Tutorials & Guides
In-depth tool tutorials, technical explanations, and best practice guides
YAML/JSON Config Conversion Guide: Essential for DevOps and Development
Covers YAML vs JSON syntax differences, conversion pitfalls, and practical tips for Docker Compose, Kubernetes, GitHub Actions, and other config workflows.
XML & JSON Conversion Guide: Config Files and API Data Format Transformation
Detailed guide to XML vs JSON differences, attribute handling, namespace considerations, step-by-step XML↔JSON conversion, and common pitfalls like array detection and text nodes.
X.509 Certificate Tutorial: Free Online Tool, Browser-local
Step-by-step guide to using X.509 Certificate. Free, no signup, runs locally in your browser.
Wi-Fi QR Code Generation Guide: Scan to Connect, No Password Typing
Detailed guide to Wi-Fi QR code encoding format and generation steps, covering WPA/WEP/Open authentication types, with tips for guest network setup.
Video Trim Guide
Cut video clips by start/end time locally.
Video to GIF Guide
Convert video clips to animated GIFs locally.
Video Audio Extraction Guide: Separate Audio Tracks from MP4/MOV
Learn how to extract audio tracks from video files online, with MP3/WAV/OGG output formats, adjustable bitrate, and local browser processing.
Complete Guide to Video Format Conversion in the Browser
Step-by-step guide to converting video formats in your browser, including MP4 to WebM, trimming, compression, and GIF conversion — all powered by ffmpeg.wasm with zero uploads.
Video Compression Guide
Reduce video file size locally with FFmpeg.
Complete Guide to URL Encoding: Percent-Encoding Principles and Practice
From URL structure to percent-encoding rules—explains the difference between encodeURIComponent and encodeURI, and how to handle Chinese parameters, special characters, and internationalized domain names correctly.
TOML and JSON Conversion Guide
Practical config file format conversion, mastering TOML↔JSON techniques and common use cases
Complete Guide to Timestamp Conversion: Unix Time, Time Zones, and Date Math
Explains Unix timestamp principles, seconds vs milliseconds, time zone handling, Cron expressions, and practical conversion tips for everyday developer debugging.
Chinese Character to Pinyin Guide: Tone Marks and Polyphonic Character Handling
Detailed guide to Chinese-to-pinyin conversion algorithms, tone mark styles, polyphonic disambiguation strategies, and initial abbreviation, with step-by-step tool instructions.
Data Masking Guide: Privacy Protection for Phone Numbers, ID Cards, and Emails
Detailed guide to data masking rules and templates for phone numbers, ID cards, bank cards, and emails, with compliance requirements and step-by-step tool instructions.
Complete Guide to Text Diff: Use Cases and Tips
Explains how text Diff works, Side-by-Side vs Unified views, practical tips for code review and document proofreading, and structured comparison with JSON Diff.
Text Case and Naming Style Conversion Guide: camelCase, snake_case, and More
Systematic guide to common programming naming styles (camelCase, PascalCase, snake_case, kebab-case, etc.) and their conversion rules, with step-by-step instructions.
Complete Guide to SQL Formatting: Beautify, Minify, and Debug Tips
Explains why SQL formatting matters, keyword casing conventions, indentation styles, strategies for complex queries, and common SQL debugging scenarios.
RSA Key Pair Generation Guide: Public-Key Encryption and Private-Key Signing
Complete walkthrough of RSA key pair generation, public-key encryption, and private-key signing, including key length selection, PEM format, and troubleshooting.
Regex Testing and Debugging: From Basics to Efficient Patterns
A practical guide to testing and debugging regular expressions, with syntax cheat sheets, performance tips, common pitfalls, and how to validate patterns online.
Random Number Generator Tutorial: Free Online Tool, Browser-local
Step-by-step guide to using Random Number Generator. Free, no signup, runs locally in your browser.