Validate, format, minify, or alphabetically sort JSON data with clear syntax errors.

Generate one or many cryptographically random UUID version 4 identifiers.

Create SHA-1, SHA-256, SHA-384, or SHA-512 hashes from text or local files.

Decode a JSON Web Token header and payload locally without uploading the token.

Convert Unix timestamps to readable dates or turn a date and time into seconds and milliseconds.

Replace every matching word, phrase, or optional regular-expression pattern.

Regex Tester

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