Overview
Instant regex tester: flags, live highlights, groups, and replace preview. Works fully offline. No permissions.
Regex Lab is a lightweight, offline regular-expression tester built for clarity and speed. Enter a pattern, pick flags (i, g, m, s, u, y), paste test text, and see live highlighting, match counts, execution time, capture groups, and an optional Replace preview (supports $1, $2, …). You can copy the highlighted HTML or copy the replaced output in one click. Why it’s safe and easy to approve No permissions required (no tabs, no storage, no clipboard permission). Works fully offline — nothing leaves your browser. No site access and no content scripts; it doesn’t modify web pages. No background tasks, no tracking, no external network requests. MV3 & CSP-friendly: no inline scripts or remote assets. Key features Test patterns with live feedback and error messages for invalid regex. Flags: toggle i g m s u y as needed. Highlight all matches in a clean preview pane. Matches & groups: view each match with start index, length, and captured groups. Replace preview with $1, $2, … placeholders. Copy highlighted HTML or replaced output instantly. Accessible, keyboard-friendly UI with a compact “terminal” theme. Designed for developers, QA, writers, and anyone who needs fast, privacy-first regex testing inside a simple popup.
Details
- Version1.0.0
- UpdatedOctober 22, 2025
- Offered bymariaiuo8362
- Size13.23KiB
- LanguagesEnglish
- Developernelson
1264 Đ. Lê Đức Thọ Phường 15 Gò Vấp, Thành phố Hồ Chí Minh 700000 VNEmail
mariaiuo8362@gmail.com - Non-traderThis developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.
Privacy
This developer declares that your data is
- Not being sold to third parties, outside of the approved use cases
- Not being used or transferred for purposes that are unrelated to the item's core functionality
- Not being used or transferred to determine creditworthiness or for lending purposes
Support
For help with questions, suggestions, or problems, visit the developer's support site
