Regex Tester
Regex Tester is a free online Regex Tools tool that live JavaScript regex testing with match groups highlighted instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server.
Description
Live JavaScript regex testing with match groups highlighted.
- Because everything is computed client-side, Regex Tester is safe to use with sensitive data such as API keys, tokens or private logs.
How to use
Using Regex Tester takes three steps:
- Paste your data into the input box (or load the example).
- Configure the options to match your target format or scenario.
- Copy, download or inspect the output — it updates live as you type.
Examples
These ready-made examples show typical inputs and the exact output Regex Tester produces for them.
[email protected] and [email protected]
Try email pattern.
Use cases
Common situations where Regex Tester helps:
- Live JavaScript regex testing with match groups highlighted.
- Because everything is computed client-side, Regex Tester is safe to use with sensitive data such as API keys, tokens or private logs.
FAQ
What is Regex Tester?
Regex Tester live JavaScript regex testing with match groups highlighted. It runs entirely in your browser, so your data stays private.
Is Regex Tester free to use?
Yes. Regex Tester is free, unlimited and works without registration or installation.
Does my data get uploaded?
No. All processing happens locally in your browser; nothing is sent to any server.