Turn a plain-English description into a correct regular expression for your language, with a part-by-part explanation and edge cases called out.
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RegexProof reviews regular expressions for ReDoS and dialect pitfalls with deterministic heuristics plus optional model-assisted explanations — not a completeness guarantee.
Built for founders who need results without a learning curve.
Built for founders who need results without a learning curve.
Built for founders who need results without a learning curve.
Built for founders who need results without a learning curve.
Describe your goal in plain language.
RegexProof structures the work and runs the workflow.
Copy, export, or upgrade for 40 runs/day · 300/mo.
or generate below.
Try it on this page
Paste your patterns and see matches immediately - no account, no credit card.
Deterministic by default
Every check runs from a versioned rule set with severity levels and concrete remediation steps.
Pay only if you need more
Free tier covers casual use. Upgrade for higher volume, saved history and export.
Regular expression Denial of Service from catastrophic backtracking; see OWASP ReDoS guidance.
Notes cover JavaScript/ECMAScript, Python, Go, PCRE, and Rust differences at a high level.
No. Heuristics catch common patterns; novel attacks may be missed.
Explicit Demo returns labelled results without live AI.
It suggests safer patterns and notes; you decide what to ship.
OWASP ReDoS community page and ECMA-262 regular expression semantics.
As a cloud web app, RegexProof is reachable from any country with internet access; there is no region lock by default. Payment availability via our merchant of record (Waffo Pancake) may vary by processor and region.
Your inputs are used only to generate your output and are never sold. Retention, sub-processors, and your rights are described on our Privacy page; Enterprise plans can include a DPA and NDA on request.
The interface and generated results are in English. You can paste input in other major languages wherever the underlying model understands them.
Licenses are issued manually after your payment is confirmed: we generate one per paid order and send it to the purchase email, typically within a few hours. Enter it below to activate Pro on this device — no account needed. Nothing yet? Write to lixingliangsy@163.com and reference your order email.
Yes. Self-serve plans cancel anytime; access continues until period end.
No. Start with email signup, then upgrade when ready.
No for Free/Pro. AI runs are included in your plan (fair use) via our platform key. Enterprise can optionally bring your own provider key (BYOK) — configure it at /settings (key stays server-side only).
Pro includes about 300 AI generations/month (and a daily cap) on gpt-4o-mini. If you hit the fair-use limit, Studio returns a mock/demo result until the daily or monthly reset — or upgrade / use Enterprise BYOK for heavier volume.
Payments are processed by Waffo Pancake (merchant of record).
You receive access confirmation; fulfillment is tracked via webhook + order logs.
Join builders using RegexProof. Free to try — no card needed.
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