Generate one or many cryptographically random UUID version 4 identifiers.

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

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

Test a regular expression, inspect matches and capture groups, and preview replacements.

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

Turn a title or phrase into a clean lowercase URL slug with hyphens.

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