Tutorials & Guides
In-depth tool tutorials, technical explanations, and best practice guides
PDF Text Extraction Guide
Extract copyable text from PDFs including scanned documents.
PDF Page Numbers Guide
Add page numbers to PDFs for printing and archiving.
PDF Rotate Guide: Fix Scanned Page Orientation
Rotate PDF pages 90°/180°/270° locally in your browser.
PDF to Excel Guide
Convert PDF tables to Excel spreadsheets online.
PDF Watermarking Guide
Add text or image watermarks to PDFs locally.
UUID Generator Guide: v4 Random UUIDs and Use Cases
What is a UUID? How to generate v4 random UUIDs. Generate them online in batch — copy and use instantly.
Video Compression Guide
Reduce video file size locally with FFmpeg.
Video to GIF Guide
Convert video clips to animated GIFs locally.
Video Trim Guide
Cut video clips by start/end time locally.
WebP to JPG Guide
Convert WebP to JPG for better compatibility.
Complete JWT Security Guide: Decoding, Verification, and Common Vulnerabilities
From JWT structure and signing to common security flaws and best practices—how to use JWT decode tools correctly when debugging authentication.
Complete Guide to QR Codes: From Basics to Marketing in Practice
Covers QR code principles, type selection, design guidelines, and real-world use cases—plus how to generate high-quality codes with online tools.
Complete Guide to PDF to Word: High-Fidelity Conversion and Format Preservation
Step-by-step guide to converting PDFs into editable Word documents, covering scanned OCR, table recognition, layout preservation, and how to choose the right conversion approach.
Base64 Encoding/Decoding Explained: From Concepts to Practical Applications
Deep dive into Base64 encoding/decoding principles, use cases, and caveats, including Base32/Base58 variants and applications in URLs, images, JWT, emails, and common pitfalls.
5 Practical Tips for Online Image Compression Without Quality Loss
Deep dive into compressing images online without losing quality, covering PNG, JPEG, WebP formats, compression principles, optimal parameters, and batch processing.
JSON Formatting and Validation Guide: From Basics to Debugging
Comprehensive guide to JSON formatting, validation, and debugging, including common errors, best practices, and format conversion tips.
Online Tool Privacy: Why Browser-Based Processing Matters
Analysis of privacy risks in online tools, explaining browser-based processing technology (WebAssembly, File API, Web Crypto), and how to verify tools are truly safe.
Complete Guide to Merging PDF Files: 3 Easy Methods
Detailed guide on merging PDF files online with 3 methods, including drag-and-drop, custom ordering, and batch processing. Free, no registration, browser-based for privacy.
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.
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.