A lightweight, privacy-first alternative to regex101 that runs entirely in your browser.
| Feature | foxyyy | regex101 |
|---|---|---|
| Live match highlighting | Yes | Yes |
| Capture groups | Yes | Yes |
| Cheatsheet | Built-in | Yes |
| No account required | Yes | Yes |
| 100% client-side | Yes — nothing sent to server | Server-side processing |
| No ads | Yes | Has ads |
| No tracking | Yes — zero analytics | Tracks usage |
| Multi-language support | JavaScript only | Python, PHP, Go, etc. |
| Save patterns | No (copy to clipboard) | Yes (with account) |
| Substitution | Not yet | Yes |
| Page weight | ~8 KB | ~500 KB+ |
Use foxyyy when you want a fast, lightweight regex tester that doesn't track you or serve ads. It's ideal for quick tests during development — paste a pattern, see matches, move on. The entire page is ~8 KB and loads instantly.
Use regex101 when you need multi-language support (Python, PHP, Go regex flavors), pattern saving, or the substitution feature. It's a more full-featured tool with a larger footprint.
TRY FOXYYY REGEX TESTER — FREE, NO ADSfoxyyy is part of a collection of 50+ free developer tools at foxyyy.com. See also: JSON Formatter, Base64/JWT Decoder, Hash Generator, Text Diff.