Regex Tester with live matches
Type a pattern and a test string and see every match highlighted as you type.
匹配项
| # | 匹配 | 索引 | 分组 |
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所有操作均在您的浏览器中进行。您的数据绝不会上传到我们的服务器。
What is a regex?
A regular expression is a pattern used to search, validate and replace text.
Private by design
Your test text never leaves your device.
Why use our Regex Tester tool?
Private and secure
Everything runs in your browser. Nothing is uploaded.
Instant results
No waiting, no queues and no software to install.
Simple to use
A clean tool that works the same on phones and computers.
Free forever
No sign-up, no watermark and no hidden limits.
Regex Tester Online for Free
Type a pattern and a test string and see every match highlighted as you type. The DailyOnWeb Regex Tester is free, needs no registration and works on phones, tablets and computers.
How to use the Regex Tester
- Enter your regular expression.
- Choose flags such as g, i or m.
- Paste the text you want to test.
- Read the highlighted matches and groups.
A regex tester that respects your privacy
Many online tools send what you type to a server. This tool does all the work inside your browser, so your regex stays on your own device and nothing is stored on our side.
Tips
- Escape special characters such as . and ( with a backslash.
- Use anchors ^ and $ to match the whole string.
- Start simple and add parts one at a time.
Explore the other free utility tools on DailyOnWeb for coding, text, generators and everyday tasks.
常见问题 （常见问题）
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