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Free Regex Tester Online
Test regular expressions against sample text.
local browser tool
Introduction
Regex testers help you validate patterns for validation, parsing, replacements, and search rules before shipping them.
How To Use
Step 1
Enter a regex pattern
Add the expression and flags you want to test.
Step 2
Paste sample text
Use the real string you want to validate or parse.
Step 3
Review matches
Inspect returned matches and refine the pattern.
Examples
Input
pattern: \d+
Output
Finds all number sequences
FAQ
Does this tool upload my input?
No. This tool runs in your browser for the first release, so your input stays local.