เครื่องมือทดสอบ Regular Expression
Regex tester: test regex against text with live highlighting and match count for development, with one-click copy and offline.
วิธีใช้งาน
Enter a regex and test text to see matches and count instantly.
Overview
Regex Tester is a code tool that Regex tester: test regex against text with live highlighting and match count for development, with one-click copy and offline. It runs 100% in your browser with no upload, so you get instant results with privacy. Whether you need a quick answer or batch processing with precise control, you can enter, validate and export in seconds. The UI is responsive on mobile, tablet and desktop and supports one-click copy.
Use cases
- Format and validate JSON
- Test regex with highlights
- Escape code for string literals
- Convert between CSV/JSON/Markdown
- Use it to cross-check “正则测试、regex tester” in reports, docs or APIs to avoid manual conversion errors
How to use
- 1 Paste code/data
- 2 Pick action and options
- 3 Fix highlighted errors
- 4 Copy or export
Highlights
- Local & private: processing stays in your browser
- Live validation with tolerant parsing
- One-click copy and export for docs, code or sheets
- Batch and offline support under poor network
Notes
- Strict JSON disallows comments/trailing commas
- Disable live validation for large files
- Watch greedy vs lazy regex
FAQ
Offline?
Yes, parsing is local.
Why invalid?
Trailing commas, single quotes or BOM often cause it.
How is Regex Tester different?
It runs locally with a focus on speed and privacy, plus tolerant parsing for “正则测试、regex tester” and one-click copy for reuse.
Can I use results in official reports?
Use it as a working draft and cross-check with authoritative sources; keep the exported log and parameters for traceability.
Tip：Tip: Bookmark this page or pin the tab; find related tools via categories and search (convert → calculate → export).
All calculations run locally in your browser; nothing is uploaded.