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Regex tester
Test matches and replacements with a bounded regex worker.
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Regex tester
Your input stays in this browser unless stated otherwise
Clear your input, files and result, and restore the default settings.
0 charactersClear the source text.
How to use Regex tester
- Paste the source into the input editor, or load the built-in example.
- Adjust the basic settings, then open Advanced mode for export and fine-tuning options. Custom settings stay active when the panel is closed.
- Run regex tester, review the output, then use the available copy or download controls.
What this tool supports
Test matches and replacements with a bounded regex worker.
- Regular expression
- Set this value for your task.
- Flags
- Set this value for your task.
- Replacement (optional)
- Set this value for your task.
Limits and processing
Text operations generally accept up to 2,000,000 characters. Individual parsers, generators and formulas apply additional limits shown by their controls.
Example source
Hello ToolCabana
Frequently asked questions
What does regex tester do?
Test matches and replacements with a bounded regex worker.
Where is my input processed?
This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.
What are the input limits?
Text operations generally accept up to 2,000,000 characters. Individual parsers, generators and formulas apply additional limits shown by their controls.