Legal

Privacy Policy

Last updated: April 2026  ·  TwentyOneTools  ·  United Kingdom

The short version: your files never leave your device. We do not upload, store, or access any file you convert. Everything happens locally in your browser.


1. Who we are

TwentyOneTools is an online file conversion service operated from the United Kingdom. Our primary service allows users to convert files between formats directly within their web browser. References to "we", "us", or "our" in this policy refer to TwentyOneTools.

For any privacy-related enquiries, you can contact us at: privacy@twentyonetools.com

2. What data we collect

We are committed to collecting as little data as possible. Here is exactly what we collect and why:

We do not collect your files. All file conversions are performed entirely within your browser using JavaScript. No file content is ever transmitted to our servers.

3. How we use your data

We use the data we collect solely for the following purposes:

We do not sell your personal data to any third party. We do not use your data for advertising purposes.

4. Legal basis for processing (UK GDPR)

Under the UK General Data Protection Regulation (UK GDPR), we process your personal data on the following legal bases:

5. Cookies

We use a minimal number of cookies to operate the service. These include:

We do not use advertising cookies or tracking cookies. You can control cookie preferences through your browser settings. Disabling essential cookies may affect your ability to sign in to your account.

6. Data sharing and third parties

We share data with the following third-party services only where necessary to operate TwentyOneTools:

We do not share personal data with any other third parties, advertisers, or data brokers.

7. Data retention

We retain your account data for as long as your account is active. If you delete your account, your personal data will be permanently deleted within 30 days, except where we are legally required to retain it for a longer period (for example, billing records which may be retained for up to 7 years under UK tax law).

Anonymised analytics data may be retained indefinitely as it cannot be used to identify you.

8. Your rights under UK GDPR

As a UK resident, you have the following rights regarding your personal data:

To exercise any of these rights, contact us at privacy@twentyonetools.com. We will respond within 30 days. You also have the right to lodge a complaint with the Information Commissioner's Office (ICO) at ico.org.uk.

9. Data security

We take reasonable technical and organisational measures to protect your personal data. Passwords are stored using industry-standard hashing. All data in transit is encrypted using HTTPS/TLS. Access to personal data is restricted to authorised personnel only.

No method of transmission or storage is 100% secure. If you believe your account has been compromised, please contact us immediately.

10. Children's privacy

TwentyOneTools is not directed at children under the age of 13. We do not knowingly collect personal data from children. If you believe a child has provided us with personal data, please contact us and we will delete it promptly.

11. Changes to this policy

We may update this Privacy Policy from time to time. When we do, we will update the "last updated" date at the top of this page. For significant changes, we will notify registered users by email. Continued use of TwentyOneTools after any changes constitutes your acceptance of the updated policy.

12. Contact

For any questions, concerns, or requests relating to this Privacy Policy or your personal data, please contact us at:

privacy@twentyonetools.com