Tool guides and practical walkthroughs
Every tool now has its own English introduction, with category grouping, SEO metadata, and a direct link back to the utility page.
Featured guides
Unix Timestamp Guide
Convert Unix timestamp to date/time and vice versa, supports ms. for log timestamps, API payloads, and scheduling.
URL Encoder/Decoder Guide
Encode or decode URLs with UTF-8 support, essential for debugging. for safe URL encoding and decoding during debugging.
JWT Tools Guide
Generate, parse and verify JSON Web Tokens instantly. for inspecting, generating, and validating tokens quickly.
Regex Tester Guide
Real-time regex testing with support for common patterns. for testing patterns before shipping them into code.
Hash Generator Guide
Generate MD5, SHA-256, SHA-512 hashes for any text instantly. for quick checksums and integrity verification.
YAML/JSON Converter Guide
Professional YAML/JSON conversion with syntax highlighting. for moving configuration data between YAML and JSON.
Developer workflows
Tools for APIs, tokens, formats, and debugging.
Unix Timestamp Guide
Convert Unix timestamp to date/time and vice versa, supports ms. for log timestamps, API payloads, and scheduling.
URL Encoder/Decoder Guide
Encode or decode URLs with UTF-8 support, essential for debugging. for safe URL encoding and decoding during debugging.
JWT Tools Guide
Generate, parse and verify JSON Web Tokens instantly. for inspecting, generating, and validating tokens quickly.
Regex Tester Guide
Real-time regex testing with support for common patterns. for testing patterns before shipping them into code.
Hash Generator Guide
Generate MD5, SHA-256, SHA-512 hashes for any text instantly. for quick checksums and integrity verification.
YAML/JSON Converter Guide
Professional YAML/JSON conversion with syntax highlighting. for moving configuration data between YAML and JSON.
Cron Generator Guide
Configure Cron expressions with real-time human-readable explanation. for building readable schedules from Cron rules.
Free HTTPS Certificate Guide
Apply for free SSL certificates via Let's Encrypt. for issuing SSL certificates without leaving the browser-first flow.
JSON Formatter Guide
Format, validate, and convert JSON to TS/Go/CSV code. for formatting and converting JSON without switching tools.
IP Lookup Guide
Query current IP address, location, and ISP details. for checking network location and ISP details.
Image editing
Tools for image prep, cleanup, and conversion.
markdown to card Guide
Convert your words into beautiful social media share cards. for turning notes into shareable visual cards.
Color Converter Guide
Convert HEX, RGB, HSL, CMYK with live preview and picker. for matching color systems across design and front-end work.
Favicon Generator Guide
Convert any image into 16x16, 32x32 and other standard website icon sizes. for packaging brand images into favicon assets.
Image Compressor Guide
Dramatically reduce image file size while maintaining quality. for shrinking images without giving up too much quality.
Format Converter Guide
Convert between WebP, JPG, PNG and other common formats. for re-saving assets in the right format.
Resize & Crop Guide
Accurately adjust width, height, or crop to any ratio. for precise cropping and resizing for web assets.
Image Watermark Guide
Add text or image watermarks to protect your copyright. for protecting visual assets with branded marks.
Remove Watermark Guide
Algorithmically remove unwanted watermarks or objects. for removing simple unwanted marks and objects.
Image Merge Guide
Combine multiple images horizontally or vertically. for stitching multiple visuals into one long image.
Image Base64 Guide
Convert images to/from Base64 encoding strings. for embedding images into code or transport payloads.
EXIF Cleaner Guide
Remove GPS and sensitive metadata from your photos. for stripping location metadata before sharing photos.
Writing and documents
Tools for writing, documents, and content review.
Text Utilities Guide
Word count, case conversion, and text cleaning tools. for cleaning copy, counting words, and normalizing text.
Markdown Editor Guide
Real-time preview and HTML export for content creation. for drafting content with live preview.
HTML to MD Guide
Instantly convert webpage HTML code into clean Markdown. for converting page content into clean Markdown.
PDF Expert Guide
Merge PDFs and convert to high-quality images locally. for merging and converting PDFs in the browser.
Document Diff Guide
Compare two text versions with side-by-side highlighting. for reviewing text changes side by side.
Audio and video
Tools for audio and video processing.
Media Converter Guide
Professional FFMPEG-based video/audio transcoding tool. for local audio and video transcoding.
Everyday utilities
Small utilities you use all the time.
Password Generator Guide
Generate high-strength secure passwords with custom rules. for creating strong passwords with custom rules.
Unit Converter Guide
Fast and precise conversion for length, weight, storage, etc. for fast everyday unit changes across common categories.
QR Code Toolbox Guide
Generate artistic QR codes with Logo and WiFi support. for generating and decoding QR codes with richer layouts.
P2P File Transfer Guide
Fast and secure local file sharing directly in browser. for sharing files peer to peer without an upload server.
AI and recognition
Recognition and AI-adjacent workflows.
AI Image Detector Guide
Deep detection of AI-generated images using mainstream models. for checking whether an image looks AI-generated.
OCR Text Recognition Guide
Extract text from images with multi-language support. for pulling text out of images and screenshots.
Captcha Solver Guide
Identify and solve captcha images with automatic calculations. for recognizing simple captchas and arithmetic prompts.
Voice Synthesis Guide
High-quality text-to-speech with adjustable pitch and speed. for generating natural-sounding narration and reads.
AI Hot News Guide
Track the latest trends and reports in Artificial Intelligence. for scanning the latest platform trends from one dashboard.
Trend monitoring
Monitoring and trend discovery across platforms.
3AI Hub toolbox
3AI Hub is a browser-first toolbox focused on privacy, speed, and low-friction workflows. It combines local processing, lightweight server helpers, AI detection, image tools, document conversion, trending news, and developer utilities.