JavaScript Developer Tools

Test regex patterns, explain JavaScript errors and generate local browser-side helper outputs for frontend and Node.js workflows.

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Regex Regex Tester and Explainer

Test JavaScript regular expressions safely with try/catch, inspect matches, and see basic token explanations.

Open tool UUID UUID Generator

Generate UUID v4 identifiers locally for tests, fixtures, database rows, API examples and automation scripts.

Open tool Hash Hash Generator

Generate SHA-256 hashes locally for text, cache keys, checksums and debugging workflows.

Open tool JS JavaScript Error Explainer

Paste JavaScript browser or Node.js errors and get likely causes, fixes and debugging steps for common failure patterns.

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JavaScript Tools FAQ

Which regex engine is used?

The browser JavaScript RegExp engine, not PCRE.

Do UUIDs and hashes run locally?

Yes. They use browser APIs when available.

Can the error explainer inspect source maps?

No. Use browser DevTools or build tooling for source-map stack mapping.