Developer Tools

100+ free online tools for developers. Format, validate, convert, generate, and debug data with ease. No login, no ads, just productivity.

JWT Tools

  • JWT Decoder & Validator
    Decode, validate, and analyze JWTs. Security analysis, claims, and timeline.
  • JWT QR Code Tool
    Scan JWTs from QR codes or generate QR codes for your JWT tokens.
  • JWT Batch Decoder
    Decode and analyze multiple JWT tokens at once. CSV export and security scoring.
  • JWT Generator
    Create custom JWTs for testing and development. Choose algorithm, set claims, and get your JWT instantly.
  • JWT Compare Tool
    Compare two JWT tokens side-by-side. Instantly see differences in header, payload, signature, and security analysis.

Formatters & Validators

  • Code & Data Formatters
    Format, beautify, minify, and validate 40+ code and data formats: JSON, JS, HTML, CSS, SQL, XML, YAML, and more.
  • JSON Formatter & Validator
    Format, validate, minify, beautify, and convert JSON data instantly. Tree view, converters, and more.