Regex Tester
Test a regular expression against text and inspect matches.
About Regex Tester
Test a regular expression against text and inspect matches. Processing is designed to happen locally in your browser where the selected feature supports local processing. Review the result before replacing your original file.
How to Use Regex Tester
Select your input, choose the available options, run the tool, preview the result when available, and download the output.
📥 Input → ⚙️ Process → 📤 Result
Input
Your selected file or text
Process
Runs in your browser on supported features.
Result
A downloadable or copyable result.
❓ Frequently Asked Questions
Is Regex Tester private?
For browser-based processing, your files and text are handled on your device and are not sent to a ToolBoxly processing server.
Is Regex Tester free?
Yes. ToolBoxly provides this tool without a required account.
Does it work on mobile?
It works in modern mobile browsers, although large files can require more device memory.