Is Regex Tester an AI tool, and how is it counted?

No. Regex Tester is a non-AI tool. Guests can use it once a day, and it is unlimited with a free account. A visit counts once, the first time you add a file or text, and you can keep working for 30 minutes.

Does Regex Tester upload my content?

No. Regex Tester runs entirely in your browser, so your content never leave your device.

How long does Regex Tester take?

Results appear instantly as you type or drop a file.

Regex Tester

Q: What does Regex Tester do?

Test regular expressions against sample text.

Free

Test regular expressions against sample text with live highlighting of matches and capture groups. Supports JavaScript flags like g, i, and m.

Pattern

Flags

Test string

Matches

0 found

No matches

Adjust your pattern or test string.

How to get the best results

1Type a pattern and any flags (g, i, m…).
2Paste the text to test against.
3Matches and groups highlight as you type.

Example

You give

Pattern: \b\d{4}-\d{2}-\d{2}\b Flags: g Text: Invoices dated 2026-09-30 and 2026-10-03 are due.

You get

2 matches: 2026-09-30 and 2026-10-03

Regex Tester FAQ

Common questions about using this tool on Toolartisan.

More utilities people use with Regex Tester.

All tools

JSON FormatterBeautify, minify, and validate JSON.
Base64 Encode/DecodeEncode and decode Base64 strings and files.

Matches

No matches

How to get the best results

Regex Tester FAQ

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