22 browser tools. No signup.
Developer tools that run in your browser
Format JSON, decode JWTs, generate IDs, compare text, convert time zones, and prepare images without uploading your files.
Start With
JSON Formatter
Format, minify, validate JSON — convert between formats
JWT Decoder
Decode JWT tokens, view claims, and verify HS256 signatures
GUID Generator
Generate UUID v4 or v7 values and validate existing IDs
Diff Tool
Compare and find differences between texts
Time Zone Converter
Convert times between different time zones instantly
Image Compressor
Reduce image file size without changing dimensions — export as WebP, JPEG, or PNG
All Tools
Browse by task when you know what kind of work you need to do.
Time & Scheduling
Code & Diff
GUID Generator
Generate UUID v4 or v7 values and validate existing IDs
UUID Validator
Check UUID format, version, variant, and normalized output
Bulk UUID Generator
Generate up to 1,000 UUID v4 or v7 values at once
UUID v4 / v7 Generator
Generate random UUID v4 values or time-ordered UUID v7 values
GUID vs UUID
Compare GUID and UUID naming, formats, versions, and uses
Diff Tool
Compare and find differences between texts
Data & Formats
Design & Visuals
Color Picker
Pick, tune, save, and copy colors
UI Palette Builder
Turn one color into usable UI tokens
Brand Palette Extractor
Extract, edit, and export dominant colors from any image
Image Cropper
Visually crop any image and export to favicon, app icon, or social media bundles
Retina Asset Export
Export any image as @1x, @2x, and @3x — ready for Xcode, React Native, or web
Image Compressor
Reduce image file size without changing dimensions — export as WebP, JPEG, or PNG