Legal

Privacy Policy

Last updated: March 2025
Convertlo is a free, browser-based file conversion tool. All file processing happens entirely on your device. Your files are never uploaded to our servers — we cannot see, access, or store them.

1. Information we collect

Convertlo does not require you to create an account or provide any personal information to use the tool. We collect limited, non-personal data automatically:

  • Usage data — pages visited, time spent, general interaction patterns (collected anonymously via Google Analytics)
  • Technical data — browser type, device type, operating system, screen size, and approximate country (not city or address)
  • Cookies — small text files stored on your device by us and our advertising partners (see Section 4)

We do not collect: names, email addresses, file contents, or any personally identifiable information.

2. How your files are processed

All conversions and compressions on Convertlo happen 100% inside your browser using built-in browser technologies (Canvas API, Web Audio API, and open-source JavaScript libraries). This means:

  • Your files never leave your device
  • We have no access to your file names, file contents, or converted output
  • Nothing is stored on our servers — because we don't use any
  • Your conversion history is stored only in your browser's localStorage and never transmitted to us

3. Google Analytics

We use Google Analytics to understand how visitors use Convertlo. This helps us improve the tool. Google Analytics collects anonymised data such as page views, session duration, and device type. This data is processed by Google and subject to Google's Privacy Policy.

You can opt out of Google Analytics tracking using the Google Analytics opt-out browser add-on.

4. Advertising and cookies

Convertlo is free to use and is supported by advertising. We use Google AdSense to display ads. Google AdSense may use cookies and similar technologies to show you relevant ads based on your browsing history and interests.

Specifically, Google may use:

  • Cookies to serve ads based on your prior visits to our site or other sites
  • The DoubleClick cookie to serve interest-based ads across the web
  • Device identifiers to help measure ad performance

You can opt out of personalised advertising by visiting Google's Ads Settings or www.aboutads.info.

For more information on how Google uses data when you use our site, visit: google.com/policies/privacy/partners.

5. Third-party libraries

Some conversions load open-source JavaScript libraries on demand from trusted CDN providers (jsDelivr, Cloudflare). These libraries run entirely in your browser and do not transmit your file data. The libraries we use include:

  • jsPDF — PDF generation
  • mammoth.js — DOCX reading
  • PapaParse — CSV parsing
  • SheetJS — XLSX generation
  • fflate — ZIP creation

6. Data retention

Since we don't collect personal data or store files, there is nothing to retain or delete on our end. Your local conversion history (stored in your browser's localStorage) can be cleared at any time by clicking "Clear all" on the main page, or by clearing your browser data.

7. Children's privacy

Convertlo is not directed at children under 13. We do not knowingly collect any information from children. If you believe a child has provided personal information, please contact us and we will address it promptly.

8. Changes to this policy

We may update this Privacy Policy from time to time. Any changes will be posted on this page with an updated date. We encourage you to review this page periodically.

9. Contact us

If you have any questions about this Privacy Policy, please contact us.