Developer
Regex Studio
Test, replace, explain, and reference JavaScript regular expressions locally.
Client-side only
Processing is local to this browser. DevPaste does not upload pasted content, JWTs, .env values, editor contents, or HMAC secrets to a server.
Everything runs locally in your browser. Patterns and test text are not uploaded or stored by default.
Some regular expressions may be computationally expensive. Live matching is disabled for large or risky inputs; JavaScript regex execution cannot be made perfectly safe.
Flags
Test text
Monaco editor content is kept in component memory only.
Monaco
Samples
Cross-tool actions
Matches
2
Groups
4
Named
4
Mode
Live
Test results
2 matches found.
Highlighted matches
Contact ada@example.com or support@devpaste.dev.
All matches
Selected match details
Selected match
Match 1, index 8-23, line 1, column 9
Full match
ada@example.com
Capture groups
$1
ada
$2
example.com
Named groups
user
ada
domain
example.com