JSON Formatter
Format JSON into a readable, indented document.
Developer & securityFREE TOOL
Regex Tester
Test a JavaScript regular expression against a text sample.
Runs in your browser
Your input
Your input stays in your browser. No account needed.
Your result
↗A little input.
A little input.
A useful result.
Fill in the details and run the tool.
Your result will appear here.
No registrationProcessed locallyFree to use
How to use Regex Tester
Enter the pattern without / delimiters. Matching runs in a separate worker with a time limit.
- Fill in the input fields.
- Check your input and run the tool.
- Review, copy or download the result.
Frequently asked questions
How do I use Regex Tester?
Enter the pattern without / delimiters. Matching runs in a separate worker with a time limit.
Is Regex Tester free to use?
Regex Tester is free and does not require an account. Copy or download the result for your workflow.
What happens to my input?
Inputs and files are processed on your device. Anonymous usage events never contain your input or generated output.