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Build and debug JavaScript regular expressions interactively - toggle flags g/i/m/s/u/y, view all matches with positions, inspect named capture groups.
This regex tester runs 100% in your browser. Nothing you paste, drop, or generate ever leaves your device - no analytics on your input, no uploads, no logs.
JavaScript ECMAScript regex - same engine as Chrome/Node.
Same browser-only philosophy. Free, no signup, no upload.
Beautify, validate, and minify JSON with sortable keys, exact error positions, and a one-click copy.
Percent-encode and decode URLs and query parameters.
Generate v1, v4, and v7 UUIDs in bulk - copy or download as JSON.
Validate JSON syntax with exact line and column for every error.
Strip whitespace from JSON to produce a single compact line.
Convert a JSON array of objects into a downloadable CSV file.
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