JSON & data
JSON Formatter & Validator
Format, minify and validate JSON, with clear parse errors.
Open tool →Developer utilities
UUID Generator
Generate UUIDs, including bulk generation.
Generate random version 4 UUIDs, one per line. Generate up to 100 at a time. Values come from your browser's cryptographic random source.
1 to 100
Choose how many UUIDs you need, then press Generate.
Privacy: this tool runs in your browser. The data you enter is not sent to a server.
Related tools
JSON & data
JSON Diff Checker
Compare two JSON inputs and highlight additions, removals and changes.
Open tool →JSON & data
CSV to JSON Converter
Convert CSV with headers and basic quoting into JSON.
Open tool →Developer utilities
JWT Decoder
Decode and inspect a JWT header and payload. This is not a signature check.
Open tool →Encoding & decoding
Base64 Encoder & Decoder
Encode and decode text in Base64, with Unicode support.
Open tool →Encoding & decoding
URL Encoder & Decoder
Encode and decode URL components, with examples.
Open tool →Image & media
Image Compressor
Compress JPEG, PNG and WebP images in your browser. Files are never uploaded.
Open tool →