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Select the supported files. They upload directly into an isolated job workspace.
ToolsDeveloper & Text Tools
RegEx Tester
Test and debug regular expressions in real time with group captures and syntax highlighting.
Deleted automatically after 30 minutes
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Fidelity A · High fidelity
This tool preserves normal PDF quality and structure for its core operation.
Choose files or drag them here
text/* · Up to 0 files · Max 25 MB per file
Set options
Configure only the settings relevant to this tool, then start processing.
Download safely
Review warnings, download the result, or delete the job immediately.
Frequently Asked Questions
Is RegEx Tester completely free on Ukitz?
Yes, RegEx Tester is 100% free with no subscriptions, no watermarks, and no registration required.
Are my files secure when using RegEx Tester?
Your files and data remain completely private. Processing occurs locally in your web browser or inside an isolated session that automatically deletes files.
Can I use RegEx Tester on mobile devices?
Yes, RegEx Tester is fully responsive and optimized for iPhones, iPads, Android smartphones, tablets, and desktop computers.