Need to format JSON from an API response? The Wivrix Regex Tester is free, works in your browser, and takes seconds to use.
What this tool does
Test regular expressions live against your text. See matches highlighted instantly with cheat sheet, common patterns, and group capture. Free online regex tester.
Why use Wivrix?
Many online tools ask you to sign up, add a watermark, or upload your files to a server you cannot see. Wivrix is different:
- Private by design — Everything runs in your browser. Your files and input stay on your device — nothing is uploaded to Wivrix.
- Free — no account, no paywall, no file-size tricks
- Fast — open the page and start working
Step-by-step guide
- Enter your regular expression in the pattern field.
- Toggle flags: g (all matches), i (ignore case), m (multiline), s (dot matches newline), u (unicode).
- Paste sample text to test against.
- Click Test Regex to see every match with its index, captured groups, and named groups.
Common uses
- Format json from an api response
- Decode a jwt during debugging
- Test a regular expression quickly
- Convert yaml config to json
Frequently asked questions
Do I need an account?
No. Open the tool and use it straight away.
Is the Regex Tester really free?
Yes. Wivrix tools are free to use. The site is supported by ads that load only after you consent.
Is my data safe?
Everything runs in your browser. Your files and input stay on your device — nothing is uploaded to Wivrix.
Try it now
Open the free Regex Tester and follow the steps above. If this guide helped, bookmark the tool or share it with someone who needs the same job done quickly.
Related tools
- Text Diff Checker — see also our guide
- URL Encoder / Decoder — see also our guide
- Base64 Encoder / Decoder — see also our guide
Ready to try it? Open the free Regex Tester — no sign-up needed.
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