Fast, clean online tools for everyday work.
Simple utilities built to save time on everyday tasks — organized by category and quick to use.
Regex Tester / Replacer
Test regular expressions, inspect matches and capture groups, and run safe find-and-replace directly in your browser.
Regex Tester and Replacer for pattern matching
Use Regex Tester / Replacer to test regular expressions against sample text and perform replacements. It is useful for searching, cleaning, validating, and transforming text patterns.
How to use this tool
- Enter a regular expression pattern.
- Paste sample text to test against.
- Review matches or run a replacement.
Common use cases
- Test regex before using it in code.
- Find patterns in logs, text, or data exports.
- Prepare safer search-and-replace rules.
Frequently asked questions
What is regex?
Regex, or regular expression, is a pattern used to search, match, and manipulate text.
Can I use regex for validation?
Yes. Regex can help validate formats like emails, IDs, codes, and structured text patterns.
Should I test regex before using it?
Yes. Testing regex first helps avoid incorrect matches and accidental replacements.