Legal
Privacy Policy
Last updated: September 8, 2026
FastCompiler ("we", "us") respects your privacy. Because the compiler runs entirely in your browser, we have very little data about you in the first place. This policy explains what we do collect, and why.
1. The code you write stays with you
FastCompiler compiles HTML, CSS and JavaScript locally, inside your browser. We do not upload, send, store, or otherwise transmit the code you write to any server. Your code is saved to your own browser's local storage and never leaves your device. Clearing your browser storage will delete it.
2. Information we collect
Because there are no accounts, we do not collect names, email addresses, or passwords to use the product. The only information we may collect is:
- Basic analytics — anonymous usage data such as page views, referring site, approximate location/region, and device or browser type, used to understand how the site is used.
- Contact information — the name, email, and message you voluntarily send us through the contact page.
3. Cookies
We use cookies and similar technologies to provide a better experience, help the site work correctly, and understand aggregate usage. Essential cookies keep the editors, preferences and consent choice working. If you accept optional cookies, we use them for anonymous analytics. You can change your choice at any time by clearing this site's data in your browser settings — the consent banner will appear again. FastCompiler will still work if you decline optional cookies.
3a. Advertising and Google AdSense
We may show ads served by Google AdSense to support this free service. Google uses cookies to serve ads based on your prior visits to this and other websites. Google's use of advertising cookies enables it and its partners to serve ads based on your visit to our site and/or other sites on the Internet. You may opt out of personalized advertising by visiting Google Ads Settings and aboutads.info choices. See How Google uses information from sites that use its services for details. We never share the code you write with advertisers — your editor content stays on your device.
4. How we use information
We use collected information solely to:
- Operate, maintain, and improve FastCompiler.
- Understand general usage trends (never individual code).
- Respond to messages you send us.
5. Sharing your information
We do not sell your personal information. We do not share your data with third parties for their own marketing. We may share limited data with service providers who help us operate the site (for example, hosting or analytics), bound by confidentiality.
6. Storage and security
We take reasonable measures to protect information in transit, and we minimize how much data we hold at all. Because your code never leaves your device, it is not at risk on our servers.
7. Your rights
Depending on your jurisdiction (for example, under the GDPR), you may have the right to access, correct, or delete personal data we hold about you, and to object to or restrict certain processing. To exercise these rights, contact us via the contact page.
8. Children's privacy
FastCompiler is not directed to children under 13, and we do not knowingly collect personal information from children.
9. Changes to this policy
We may update this policy from time to time. We will post any changes on this page and update the "Last updated" date. Continued use of FastCompiler after changes constitutes acceptance of the revised policy.
10. Contact
If you have questions or concerns about this policy, please contact us.