Regex Tester
Test a regular expression against sample text and see matches, groups and flags highlighted live.
Your file is processed locally in your browser and is not uploaded to our server.
Matches (2)
Contact us at hello@example.com or support@example.org
How to use Regex Tester
- 1Enter a regular expression pattern and flags (e.g. g, i, m).
- 2Paste sample text to test against.
- 3Matches are highlighted, and capture groups are listed below.
Frequently asked questions
This uses standard JavaScript regular expressions (the same engine used in browsers and Node.js).
Related tools
Developer
Text Diff Checker
Compare two blocks of text and highlight differences.
Developer
Random String Generator
Generate random alphanumeric strings.
Developer
CSV to JSON
Convert CSV or TSV data into a JSON array.
Developer
Hash Generator
Generate MD5, SHA, SHA-3, RIPEMD-160 and CRC32 hashes.
Developer
CSV Formatter
Clean up CSV/TSV data and remove duplicate rows.