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Private developer tools in your browser: JSON formatter and validator, JWT decoder, Base64, UUID generator, and regex tester.
Everyday engineering utilities for formatting, decoding, and generating data — built for speed and privacy in the browser with no signup.
Pretty-print, validate and minify JSON instantly.
Decode and inspect JSON Web Token payloads.
Encode and decode Base64 strings and files.
Generate UUIDs (v4) for apps and databases.
Test regular expressions with live match highlighting.
Generate MD5, SHA-1, SHA-256 and other hashes.