Regex Replace Tester
Test search-and-replace regex patterns and preview the output instantly.
Replacement setup
Test search-and-replace patterns before using them in code or content workflows.
Replaced output
Preview the transformed result before using the pattern elsewhere.
Common use cases
- Cleaning structured text quickly
- Testing replacement groups before using them in code
- Validating content cleanup patterns in a safer sandbox
FAQ
Does this support regex flags?
Yes. You can add standard flags like g, i, or m to match your intended replacement behavior.
Can I test capture-group replacements too?
Yes. Replacement strings work with standard JavaScript regex replacement patterns.
How it works
Enter a pattern, flags, replacement string, and source text to see the transformed result in the browser. The result is produced immediately so you can review it before copying or using it elsewhere.
Privacy
The tool is designed to process ordinary input in your browser. Avoid pasting passwords, private keys, access tokens, personal records, or other sensitive production data into any online utility.
Limitations
This utility handles the focused workflow described on this page. Check the result before production use, especially when an input depends on a vendor-specific format, security rule, or external standard.