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General
What is RegexNest?
RegexNest is an interactive online playground for writing, testing, and debugging regular expressions. It supports live matching with real-time highlighting, a built-in cheat sheet, and export to multiple programming languages including JavaScript, Python, PCRE, and Go.
Is RegexNest free to use?
Yes. The core playground — including live testing, regex explanation, and pattern history — is completely free and requires no account. Paid plans unlock team workspaces, unlimited saved patterns, and priority support.
Can I use RegexNest for commercial projects?
Absolutely. Patterns you create are yours. You may copy, export, and deploy them in any commercial or open-source project without attribution. We never claim ownership over your regex.
Who is RegexNest built for?
RegexNest serves developers, data engineers, QA testers, and students who need a fast, visual way to validate regex against real input. Whether you're parsing log files, validating email addresses, or extracting data from HTML, the playground gives you instant visual feedback.
Billing
What plans are available?
We offer three tiers: Free (unlimited testing, 10 saved patterns), Pro at €9/month (unlimited patterns, team workspaces, regex diff tool), and Team at €29/month per seat (SSO, audit logs, shared libraries, admin dashboard). All paid plans include a 14-day free trial.
How does billing work?
Pro and Team plans are billed monthly or annually. Annual billing includes a 20% discount. Payments are processed via Stripe and support credit cards, SEPA Direct Debit, and PayPal. You can upgrade, downgrade, or cancel at any time from your account settings.
Can I get a refund?
Yes. We offer a 30-day money-back guarantee on all paid plans. If you're not satisfied, contact support@regexnest.dev within 30 days of your first charge and we'll issue a full refund — no questions asked.
Do you offer discounts for education or nonprofits?
Yes. Verified educators and registered nonprofits receive a 50% discount on Pro and Team plans. Email billing@regexnest.dev with proof of eligibility and we'll apply the discount within one business day.
Technical
Which regex flavors are supported?
RegexNest supports ECMAScript (JavaScript), PCRE (PHP/Perl), Python (re module), Go (RE2), Java, Ruby, and .NET. You can switch flavors from the engine dropdown in the toolbar. Each flavor uses its respective engine for accurate matching behavior.
Can I export my regex patterns?
Yes. Patterns can be exported as standalone code snippets in JavaScript, Python, Go, Java, or C#. You can also export your entire workspace as a JSON file, share a public link, or generate a Markdown-formatted cheat sheet for your team's documentation.
Is my data stored securely?
Your regex patterns and test strings are encrypted at rest using AES-256 and in transit via TLS 1.3. We never scan, analyze, or sell your input data. Free-tier data is stored for 90 days; paid plans retain data indefinitely. You can delete everything at any time.
Does RegexNest work offline?
The playground is a progressive web app (PWA). After your first visit, you can install RegexNest on desktop or mobile and use the core testing features offline. Saved patterns sync when you reconnect. Offline mode is available on Pro and Team plans.
What browsers are supported?
RegexNest works on the latest versions of Chrome, Firefox, Safari, and Edge. For the best experience — including the regex explanation engine and live cursor tracking — we recommend Chrome 115+ or Firefox 118+.
Is there an API?
Yes. The RegexNest REST API (v2) lets you validate patterns, generate explanations, and manage saved patterns programmatically. Base URL: https://api.regexnest.dev/v2. API access is included in Pro and Team plans with rate limits of 1,000 and 10,000 requests per hour respectively.
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