Regex tester

Regex Tester

Type a pattern and see what it matches in your text as you go: each match highlighted, with its position and every capture group. Then try a replacement or split the text on it.

How do I use the Regex tester?

1. Paste the text to search.
2. Type the pattern and flags (g for every match, i to ignore case, m for line by line).
3. Read the matches and groups, or switch to replace or split.

What does the Regex tester do?

• Every match highlighted, empty matches too
• Numbered and named groups for each match
• Replace with $1, $<name> and $&
• Split on the pattern
• Flags g i m s u v y and d
• Patterns that run forever are stopped after 3 seconds

Frequently asked questions

Which regex flavour is this?

JavaScript's, as your browser runs it: lookbehind, named groups, \p{L} Unicode classes with the u flag and set notation with v. PCRE-only features like possessive quantifiers aren't there.

Is my data uploaded?

No. Bracely runs entirely in your browser, so nothing you paste or open leaves your device.

More JSON tools

Bracely has more than 65 JSON tools in one page. Related ones:

• Big files
• jq Playground
• JSONPath Tester
• JMESPath tester
• Query JSON with SQL
• JSON Pointer
• Search JSON
• JSON find and replace
• JSON column viewer
• JSON image viewer
• List tools
• Remove duplicates
• JSON Formatter
• JSON Validator
• JSON Viewer
• JSON Repair
• JSON Diff
• JSON to YAML
• JSON to CSV

Runs entirely in your browser. Nothing you paste is uploaded. Made by Saurabh Pagrut. About · Privacy policy
Last updated 22 October 2026 · Version 4.9 · Changelog
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