Regex Tester
Regex Tester with a focused editing workflow, clear options, and a result you can review before use.
Processed in your browserA simpler way to use the regex tester
Regex Tester with a focused editing workflow, clear options, and a result you can review before use. This utility runs in your browser without uploading your input. Review the output before using it.
How it works
- Enter the content described by the input label.
- Choose the available options, then run the tool.
- Review your result, copy or download it where available, and reset for another task.
Your data stays with you.
Your file and form inputs don’t leave your device. This tool works locally in your browser. We only save recently opened tool names and optional feedback on this device.
What does Regex Tester do?
Regex Tester with a focused editing workflow, clear options, and a result you can review before use.
- Cost and account
- Free to use. No account required.
- Processing
- In this browser
- Device requirements
- Desktop, tablet or phone with a supported modern browser; file and memory limits still apply.
- Inputs and settings
- Text to test; Regular expression; Flags
Limits and things to check
Runs JavaScript regular expressions in an isolated worker with a two-second limit and at most 1,000 matches.
Frequently asked questions
Does this tool upload my data?
No. Processing takes place in your browser. The tool does not save your inputs or results.
What limits apply?
Inputs support up to 100,000 characters. Tool-specific validation appears next to the form. Reset clears the current result.
What inputs does Regex Tester use?
The form asks for: Text to test; Regular expression; Flags.
What should I check when using Regex Tester?
Runs JavaScript regular expressions in an isolated worker with a two-second limit and at most 1,000 matches.