Convert PDF to editable DOCX via Alibaba Cloud Document Mind (upload required).

Convert PDF to XLSX via Alibaba Cloud Document Mind (upload required).

Rasterize each page and export as PNG, ZIP bundled, adjustable DPI scale. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Combine PNG/JPEG into a PDF, one image per page. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Concatenate multiple files in order. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Export page by page or group by a fixed page count. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Apply 90°/180°/270° rotation to selected pages. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Check pages to delete; remaining pages keep original order. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Remove black edges or whitespace, with page selection and pt margins. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Enter the known open password and export a new unprotected file. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Set an open password on your PDF with RC4 128-bit encryption, processed locally. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Export each PDF page as JPG, download as ZIP, adjustable quality. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Rasterize and rebuild as JPG-PDF for significantly smaller size (lossy). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Export as txt; works for text-based PDFs. Scanned docs may have no text. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Diagonal semi-transparent watermark, ideal for internal drafts. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Overlay PNG/JPG on every page with position and scale controls. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Batch page numbering in footer, supports {n} / {total} placeholders. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Three-column header/footer with presets and one-click placeholder replacement. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Export multiple PDFs to PNG sequentially, ZIP with subdirectories. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Reverse the entire page order (pdf-lib copy pages). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Read and write title, author, keywords, Creator, and other metadata. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Scope notes on Office conversion, text editing, watermark removal, and more. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Check if a PDF has digital signatures. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Format, minify, and validate JSON syntax, all processed locally in browser. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Config file format conversion (js-yaml). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Config format conversion (@iarna/toml). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert between object array and CSV table. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Extract nodes from JSON (jsonpath-plus). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Query JSON with JMESPath (jmespath). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Tree-shaped delta (jsondiffpatch). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Heuristically generate interface from sample JSON. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate Go struct from JSON. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate Java POJO class from JSON. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert JSON array to INSERT statements. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Deep merge multiple JSON objects. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert between XML and JSON. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Remove whitespace to minify JSON, show size savings. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Upper/lower, title case, camelCase, kebab-case, snake_case, CONSTANT_CASE, etc. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Sort, deduplicate, remove blank lines, trim each line, reverse line order. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Lines, characters, words, UTF-8 bytes, grapheme clusters. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Count words, characters, lines, and UTF-8 bytes in real time—for essays, blogs, and copy. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Literal or regex replacement with configurable flags. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Split into multiple lines by delimiter, or join lines with delimiter. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Match, groups, and highlight preview. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Line-level difference between two texts (diff). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate Latin placeholder paragraphs. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert title to URL-friendly slug. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Caesar cipher shift 13 (applying twice restores original). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Strip tags via DOMParser and extract visible text. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Add spaces or tabs before each line, or strip leading whitespace. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Ascending/descending and natural sort (numbers by value). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Add sequential numbers with width and custom separator. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Re-wrap paragraphs at given character width (UTF-16 count). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert Chinese characters to Pinyin. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert between Simplified and Traditional Chinese. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Mask sensitive information with custom keep positions. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Browse, search, and copy emojis by category. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Chinese synonym/antonym lookup with built-in dictionary. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate numeronyms like i18n, l10n, a11y. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert text to ASCII art banner. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Automatically add spaces between CJK and half-width characters. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Use { { variable } } syntax with auto-detection and batch fill. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Defang URLs for safe sharing, with refang support. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Detect platform-prohibited words, built-in word list. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Scrollable text teleprompter with mirror mode. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Decompose Chinese characters into radicals. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Batch generate URLs from template and parameters.

Filter/truncate/pad text lines by length.

Read text aloud using browser SpeechSynthesis API.

Convert between Chinese full-width and English half-width punctuation. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Reverse text at character level or line level. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Paste CSV or TSV text, auto-detect delimiter, convert to HTML table code. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Browse and copy special symbols organized by categories: math, arrows, Greek, currency, and more. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert iPhone HEIC/HEIF photos to JPG in batch; multi-file ZIP download. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert between PNG/JPEG/WebP, supports GIF first frame and SVG rasterization. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Batch compress to WebP/JPG with max dimension and quality controls. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Batch resize to uniform dimensions with contain/cover modes. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Select area or input pixel coordinates, export as PNG/JPG/WebP. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Scale proportionally by longest edge or fixed width/height, no distortion. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Adjustable position, opacity, and font size; batch export as ZIP. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Vertical long image or horizontal strip, export as PNG/JPG/WebP. 100% free, runs locally in your browser—nothing is uploaded to our servers.

View metadata and re-export with privacy info removed. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Chinese/English text recognition (Tesseract.js). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Choose size and export favicon.ico. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert WebP, JPG, PNG, GIF, etc. uniformly to PNG. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert .webp to .png. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert JPEG to PNG. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Export only the first frame of the animation. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Rasterize vector image to PNG. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Composite transparency onto white background. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Decode WebP and export as JPEG. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Smaller size, better for web delivery. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Further reduce image size in compatible environments. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Mirror, 90° rotation, grayscale, and invert via Canvas batch export. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert image to greyscale using Canvas. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Crop image into 3×3 grid, export as ZIP. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Add background, border-radius, and shadow to screenshots. Export PNG. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Canvas handwritten signature, export transparent PNG. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Extract GIF frames as PNG sequence. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert between MP4, WebM, MKV, GIF, M4A, WAV, and more—locally via ffmpeg.wasm. 100% free, nothing uploaded.

Convert common videos to MP4 for playback and sharing—local ffmpeg.wasm. 100% free.

Convert iPhone / Mac MOV files to MP4. 100% free, runs in your browser.

Convert MKV to MP4 for wider player support. 100% free.

Convert WebM downloads to MP4. 100% free.

Convert legacy AVI to MP4. 100% free.

Export WebM for web embedding. 100% free.

Export MKV container format. 100% free.

Cut a clip by start/end time; stream copy or re-encode. 100% free, browser-local processing.

Reduce resolution and CRF to shrink file size. 100% free, runs in your browser.

Turn video into an animated GIF with adjustable FPS and width. 100% free, local processing.

Export M4A (AAC) or WAV audio track from video. 100% free, nothing uploaded.

Encode and decode text or files. 100% free, runs locally in your browser—nothing is uploaded to our servers.

RFC 4648 text encode/decode (commonly used for OTP/key display). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Common encode/decode scenarios. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert between UTF-8 bytes and hexadecimal. 100% free, runs locally in your browser—nothing is uploaded to our servers.

HTML entities and JSON string escaping. 100% free, runs locally in your browser—nothing is uploaded to our servers.

MD5, SHA-256, and other checksums and digests. 100% free, runs locally in your browser—nothing is uploaded to our servers.

HMAC-SHA1/256/384/512 in hexadecimal. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Passphrase + PBKDF2 key derivation, local encrypt/decrypt. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Configurable length and charset, crypto-secure random. 100% free, runs locally in your browser—nothing is uploaded to our servers.

IEEE polynomial checksum (hexadecimal). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Bitcoin alphabet text encode/decode. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate PNG from text, URL, WiFi, etc. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Parse QR code from image (jsQR). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Byte-wise XOR with cycling key, output as hex or Base64. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Classic polyalphabetic cipher for English letter encrypt/decrypt. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate keys via Web Crypto, asymmetric encrypt/decrypt for short text. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Bcrypt hash generation and verification. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Chinese SM3 hash algorithm. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Chinese SM4 symmetric encryption/decryption. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Chinese SM2 asymmetric encryption. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Analyze password complexity, show strength bar. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate Wi-Fi connection QR code from SSID, password, encryption. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate BIP39 mnemonic for Bitcoin/Ethereum wallets. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate RSA public/private key pair (PEM format). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Classic substitution cipher with custom shift encrypt/decrypt.

DES and Triple DES encryption/decryption in browser.

RIPEMD-160 hash computation, commonly used in blockchain.

BCC and LRC checksum calculation for industrial communication.

Fix ISO-8859-1 misinterpreted garbled text to UTF-8.

Socialist core values encoding / fun Emoji encryption.

RC4 stream cipher encryption and decryption with UTF-8/Hex/Base64 encoding support. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert between seconds, milliseconds, and date. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Batch generate UUID v4 (crypto.randomUUID). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Time-sortable unique ID, batch generate. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Short random string with customizable alphabet. 100% free, runs locally in your browser—nothing is uploaded to our servers.

px/rem and byte KiB/MB conversions. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Character reference for codes 0–127. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Mod 97 check digit validation. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Bank card number mod-10 validation. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Parse and format to E.164 (libphonenumber-js). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Phonetic alphabet, Morse code, and six-dot Braille. 100% free, runs locally in your browser—nothing is uploaded to our servers.

CODE128/EAN and other 1D barcodes (JsBarcode). 100% free, runs locally in your browser—nothing is uploaded to our servers.

TOTP two-factor authentication code generator. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate Authorization header from username and password. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Parse HTTP Cookie header string into table. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate/edit JWT with custom header, payload, and secret. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate SVG placeholder images with custom dimensions and colors. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Online stopwatch: start/pause/reset/lap. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Add/subtract days, calculate date intervals. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Calculate age in years, months, days, and total days from birth date; optional reference date. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate random integers or decimals in a range (up to 500), copy with one click. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Percentage calculations. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert between °C, °F, K temperature units. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert between Arabic and Roman numerals. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Look up vendor by MAC prefix (OUI). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Calculate CIDR notation from IP range. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Common port numbers and protocols reference. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Evaluate math expressions with functions and constants. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Estimate remaining time from progress and elapsed time. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate random MAC addresses with prefix and case options. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Detect browser, screen, network and system information. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Estimate token count for GPT-4/GPT-3.5/Claude models. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Calculate simplest ratio and reverse compute from known side. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Equal installment / equal principal with payment schedule. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Calculate BMI value and category with reference chart. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Calculate work duration, overtime, and salary estimate. 100% free, runs locally in your browser—nothing is uploaded to our servers.

China cumulative withholding tax calculation. 100% free, runs locally in your browser—nothing is uploaded to our servers.

WGS84/GCJ-02/BD-09 coordinate system conversion. 100% free, runs locally in your browser—nothing is uploaded to our servers.

SRT/WebVTT/ASS subtitle format conversion. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Greatest common divisor & least common multiple. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Fullscreen scrolling danmaku, custom speed/color. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Batch generate new filenames by rules. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Look up issuing bank by first 6 digits. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Offline currency exchange rate converter. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Web Audio API audio trimming with waveform preview. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Parse .torrent files, convert to magnet link. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate placeholder images with custom size and color.

Generate app privacy policy documents.

Pomodoro technique timer.

Artistic QR codes with dot styles and gradient colors.

Calculate PPI from screen diagonal and resolution.

Equal payment / equal principal repayment schedule.

View GB2312/GBK Chinese encoding table.

Convert between solar and lunar calendar dates.

Display current time in multiple cities/time zones.

Detect mic devices, record & playback with volume visualization. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Press keys to highlight virtual keyboard, display key code and modifier info. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Full-screen solid colors for dead pixel testing, view resolution & pixel ratio. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Online drawing board with color picker, brush size, eraser, undo, clear, and PNG export. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Calculate base^exponent mod modulus with BigInt support. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Reverse bits at specified width, showing original, reversed, hex and decimal results. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Check if a year is a leap year, or list all leap years in a range. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Preview text in different fonts, supports web-safe fonts and custom font-family. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Read and display clipboard content with multiple MIME types. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Simple SVG visual editor supporting rect, circle, ellipse, line, text shapes. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Test your reaction speed, track history with average, best and worst stats. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert between IPv4 and IPv6 formats: mapped, compatible, 6to4 and more. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Set up automatic page refresh at intervals, with iframe preview and bookmarklet. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Fill in meta info and preview share card style (local simulation). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Check common rules and generate robots.txt text. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate sitemap.xml fragment from URL list. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Toggle Content Security Policy directives and export header value. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Feature policy header builder with explanations. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Paste env file and view as table (one-click value masking). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Common HTTP security header descriptions and one-click copy examples. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Query domain Whois information via RDAP protocol.

Query DNS records via DNS-over-HTTPS.

Query website ICP filing information.

Query your current public IP address and geo info.

Detect browser UA, screen, Canvas fingerprint, etc.

Check if a specific port is open on a host, with common port quick-check. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Resolve domain names using DoH protocol.

Decompose URL and query parameters into a table. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Internationalized domain name xn-- and Unicode. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert between file and data: Base64. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Guess type by magic bytes (PNG/PDF/ZIP etc.). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Extension and MIME type reference. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Indent and minify (js-beautify). 100% free, runs locally in your browser—nothing is uploaded to our servers.

SVG/XML validation and indentation. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Live preview with blog-style rendering. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Common codes lookup and search. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Rough UA string parsing. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Debug keydown key / code values. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert between HEX, RGB, HSL and copy as CSS. 100% free, runs locally in your browser—nothing is uploaded to our servers.

WCAG foreground/background contrast ratio. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert between CSV and Markdown pipe table. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert alphanumeric and common punctuation between full and half width. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert amount to Chinese uppercase (yuan, jiao, fen). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Paste .ics and list event summaries. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Decode electronic business card fields into a table. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Unfold folded lines and display key-value pairs. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Validate Chinese ID card number and extract info. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Traditional color names with hex values, click to copy. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Calculate family relationship titles from relationship chain. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Interactive periodic table with element details. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Tian/Mi/Fang/Dot grid paper generation. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Auto-balance chemical equations.

Format query/mutation (graphql). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Tree-view browse and search Swagger JSON. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert between Java .properties and JSON. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate EditorConfig from tech stack presets. 100% free, runs locally in your browser—nothing is uploaded to our servers.

General XML validation and indentation. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Version validity, ordering, and diff (semver). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Render flowchart/sequence diagram source (mermaid). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Format/beautify Nginx config files. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert docker run command to docker-compose.yml. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Common regex patterns reference. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate fake data like names, emails, addresses. 100% free, runs locally in your browser—nothing is uploaded to our servers.

JS code beautifier/deobfuscator (simple formatting). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert cURL commands to Python/JavaScript/Go/PHP/Java code. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Visual box-shadow editor with multi-layer support and live preview. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Adjust each corner independently with live preview. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Visual Flex property editor with live layout preview. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Linear/radial gradients with adjustable color stops and angle. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Visual keyframes editor with preset animations. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Simulate protanopia, deuteranopia, tritanopia, and achromatopsia. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Decode Base64/Hex protobuf data without schema. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Apache auth file generation, bcrypt/SHA algorithms. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Code syntax highlighted screenshot image. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate CSR and private key pair. 100% free, runs locally in your browser—nothing is uploaded to our servers.

HTML/CSS/JS live preview and execution.

Generate ASCII tree text from folder structure.

Convert key-value pairs to variable definitions in various languages.

Drag & drop files to calculate SHA-1/256/512 hash.

Convert between Big-Endian and Little-Endian.

Show original/ones/twos complement for a given integer and bit width.

Generate self-signed SSL key pairs and fingerprints.

Upload .pfx/.p12 file, parse and export certificate & private key PEM. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Send HTTP requests and view response status, headers & body. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Multi-language code formatter for JS/TS/HTML/CSS/JSON/XML/SQL/Python with adjustable indent and wrap. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Parse header/payload as JSON (signature not verified). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Beautify and minify (sql-formatter). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Select and merge common templates. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Gzip, Deflate, Brotli (streaming API). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert 5-field cron expression to human-readable description. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert between octal and rwx notation. 100% free, runs locally in your browser—nothing is uploaded to our servers.

CIDR network/broadcast/host range. 100% free, runs locally in your browser—nothing is uploaded to our servers.

CIDR start/end and address count (ip-address). 100% free, runs locally in your browser—nothing is uploaded to our servers.

PEM parse and SHA-256 fingerprint (@peculiar/x509). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Float32/64 hexadecimal with exponent and mantissa. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Binary/octal/decimal/hex and big integers (BigInt). 100% free, runs locally in your browser—nothing is uploaded to our servers.