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Test regular expressions with live match highlighting and export.
Test regular expressions with live match highlighting and export.
Workspace
Private · Browser-based · No account · No upload
Regex Tester is a free online JSON & Developer Tools tool on AllToolHub. Test regular expressions with live match highlighting and export.
Unlike installable desktop suites, Regex Tester loads in a tab so you can finish a task without creating an account or learning a heavyweight app.
This tool is a good fit when you need help with regex, regexp, pattern, test.
Enter a pattern and flags (presets for words, email, URL, digits).
Paste a test string — matches highlight live.
Copy or download matched strings for further use.
Yes. Regex Tester on AllToolHub is free, requires no account, and is built to run in your browser without a paid plan or watermarks from us.
Processing is designed to happen locally in your browser whenever possible. payloads and tokens are handled in-page - still avoid pasting production secrets on shared machines. Standard web hosting may still log technical page requests, not your file contents.
After the first visit, the Progressive Web App cache can keep many pages available offline. Tool scripts must be cached first; heavy libraries load when you open the tool.
Validate outputs in your real environment before shipping config changes. Related tools appear in the sidebar if you need a neighboring workflow.
Modern Chrome, Edge, Firefox, Safari, and mobile equivalents. Some advanced file or crypto features need a recent browser version.
Your browser’s JavaScript RegExp engine. Features and edge cases match modern JS, not PCRE or .NET.
Test regular expressions with live match highlighting and export. It runs in your browser on AllToolHub with no account required.
Very large inputs may be limited by your device memory and browser. For huge files, try a desktop machine or split the work into smaller batches.