Question 1

Which regex flavors do you support?

Accepted Answer

JavaScript (default), PCRE-compatible, and POSIX. We mark unsupported features clearly when you switch flavors.

Question 2

Does my test string leave my browser?

Accepted Answer

No. Everything is client-side; we don't send your regex or test strings to a server unless you opt in to cloud-sync your saved patterns.

Question 3

Can it explain a regex I didn't write?

Accepted Answer

Yes — that's exactly what the explainer does. Paste any regex and get a step-by-step plain-English breakdown.

Question 4

Do I get a free trial?

Accepted Answer

No — RegexBuilder is a paid tool from $5/mo. The library and demo on the landing page show what you get.

Question 5

How do I cancel?

Accepted Answer

From your account page, or by emailing us. Cancellation stops the next renewal.

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