JustInBrowser
A collection of free, powerful utility tools designed for developers and professionals. Simple, fast, and always available.
Lightning Fast
All tools run directly in your browser with instant results
Always Free
No subscriptions, no hidden fees, just free tools for everyone
Privacy First
Your data stays on your device, we don't track or store anything
Available Tools
Choose from our collection of carefully crafted utility tools
JS to JSON Converter
Convert JavaScript objects to properly formatted JSON with syntax validation
QR Code & Barcode Generator
Generate QR codes and barcodes with downloadable high-quality outputs
API Request Tester
Test REST APIs with full HTTP method support and response visualization
Color & Gradient Converter
Visual color picker with format conversion and gradient generator for all platforms
Regex Tester & Generator
Test regular expressions with real-time matching and common pattern snippets
Markdown to HTML Converter
Convert Markdown to HTML with live preview and multiple themes
Image Compressor & Converter
Compress and convert images between formats with drag-and-drop interface
Image Annotator
Upload images and add annotations with arrows, shapes, text, and freehand drawing
JSON Viewer & Beautifier
Format, validate, and explore JSON with syntax highlighting and tree view
Custom Text Generator
Generate placeholder text in various styles for design and development
Text Analyzer
Analyze text for word count, character count, and keyword density statistics
Color Palette Extractor
Extract dominant colors from uploaded images and get hex color codes
Cron Expression Generator
Generate cron expressions with visual interface and common presets
Password Strength & Generator
Check password strength and generate secure passwords with customizable options
Favicon Generator
Convert images to favicon files (.ico) with multiple sizes (16x16, 32x32, 48x48)