U

Utilitop

JSON Formatter YAML Formatter XML Formatter SQL Formatter HTML Formatter CSS Formatter JS/TS Formatter

Base64 Encoder/Decoder URL Encoder/Decoder JWT Decoder HTML Entity Encoder/Decoder Unicode Encoder/Decoder GZip Compress/Decompress Hex Encoder/Decoder Morse Code Encoder/Decoder

UUID Generator Hash Generator Password Generator Lorem Ipsum Generator QR Code Generator CRON Parser Color Picker File Checksum

JSON ↔ YAML Converter JSON ↔ CSV Converter Timestamp Converter Number Base Converter XML ↔ JSON Converter Markdown Preview

Regex Tester Text Diff Case Converter Word & Character Counter Text Sorter & Deduplicator List Converter / Joiner

HTTP Status Codes JSONPath Tester

Mermaid PlantUML Graphviz D2

All processing is local & private

U

Utilitop

JWT Generator

Generate signed JWT tokens

⚠ Do NOT use production secrets in this tool. This runs entirely in your browser.

Payload (JSON)

Secret Key

Algorithm