Skip to content

BrowserTools.tech

Loading

BrowserTools.tech · files stay on your device

All tools Privacy

© 2026 BrowserTools.tech. All rights reserved.

Developed by Santhosh Kumar Korimi

Home
Tools
Developer
Regex Tester

Regex Tester

Test regular expressions with live match highlighting in your browser. Free private regex tester — no upload.

Runs in your browser. Files stay on this device.

//

Test string

Matches update as you type

2 matches · /gi

Matches

Index and capture groups

1. [0] "BrowserTools"
2. [28] "tool"

Live via RegExp

About Regex Tester

Write a pattern, paste sample text, and see matches update live. Debug capture groups before shipping validation logic.

Runs entirely in your browser so private test data never leaves your device.

Frequently asked questions

Yes. Use common flags for global and case-insensitive matching.

No. Regex testing stays in your browser.

Yes. Test regular expressions online free.

Related tools

JSON Formatter
Case Converter
Text Diff
Slug Generator