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Terms of Service — MB Viewer

MokingBird Oy | Business ID: 3615646-1 | Finland

Last updated: April 2026

1. Acceptance of Terms

By downloading, installing, or using MB Viewer ("the application," "the software"), you agree to be bound by these Terms of Service ("Terms"). If you do not agree to these Terms, do not download or use MB Viewer.

These Terms constitute a legal agreement between you and MokingBird Oy, a company registered in Finland (Business ID: 3615646-1).

2. Description of Service

MB Viewer is a free, offline-first desktop application for viewing and editing files including TSX, JSX, HTML, Markdown, JSON, CSS, JavaScript, SVG, images, and plain text. The application is built on Electron and runs locally on your device. It does not require an internet connection for core functionality.

MB Viewer is distributed:

Only download MB Viewer from these official sources. MokingBird is not responsible for any harm resulting from software downloaded from unofficial or third-party sources.

3. License

3.1 Free License

Subject to these Terms, MokingBird Oy grants you a non-exclusive, non-transferable, revocable license to:

3.2 Restrictions

You may not:

3.3 Future Premium Features

MB Viewer is currently free for all features. MokingBird Oy reserves the right to introduce premium features in future versions that may require a license purchase or subscription. Any such changes will be clearly communicated before they take effect, and existing free features will remain free.

4. Downloading and Installation

MB Viewer is provided as a downloadable file (.exe for Windows, .dmg for macOS, .AppImage for Linux). Installation instructions are available on the official website.

By downloading MB Viewer, you confirm that:

5. Your Files and Data

Files you open in MB Viewer remain entirely your property. MokingBird Oy has no access to the files you view or edit. Nothing is transmitted to MokingBird servers as a result of opening or editing files. Your data is yours.

See our Privacy Policy for full details.

6. Updates

MokingBird Oy may release updates to MB Viewer that include new features, bug fixes, or security patches. Updates are available from the official GitHub releases page. You are not obligated to update, but we recommend staying current for the best experience and security.

If automatic update checks are enabled, the app will notify you when a new version is available. Updating requires downloading and installing the new version manually from the official source.

7. Disclaimer of Warranties

MB Viewer is provided "as is" and "as available" without warranties of any kind, either express or implied. To the fullest extent permitted by applicable law, MokingBird Oy disclaims all warranties, including but not limited to:

The rendering of files in MB Viewer (TSX previews, Markdown output, HTML sandboxes) is provided for convenience and preview purposes. Do not rely solely on MB Viewer's rendering for production decisions without independent verification.

8. Limitation of Liability

To the maximum extent permitted by Finnish law and EU law, MokingBird Oy shall not be liable for:

9. Intellectual Property

MB Viewer, including its source code, design, branding, and documentation, is the intellectual property of MokingBird Oy. The MokingBird name, logo, and MB Viewer name are trademarks of MokingBird Oy.

MB Viewer incorporates open-source components (Electron, React, Vite, Babel, KaTeX) which remain governed by their respective open-source licenses.

10. Indemnity

You agree to indemnify and hold harmless MokingBird Oy and its affiliates, officers, and employees from any claims, damages, losses, or expenses (including reasonable legal fees) arising from your misuse of MB Viewer, violation of these Terms, or infringement of any third-party rights.

11. Termination

Your license to use MB Viewer terminates immediately if you breach these Terms. To "uninstall" MB Viewer and end your use: delete the application file from your device. No deregistration process is required.

MokingBird Oy reserves the right to discontinue distribution of MB Viewer at any time, with reasonable notice provided through the official website and GitHub repository.

12. Governing Law

These Terms are governed by the laws of Finland and applicable European Union law. Any disputes arising from these Terms or your use of MB Viewer shall be subject to the exclusive jurisdiction of Finnish courts.

13. Changes to These Terms

MokingBird Oy may update these Terms from time to time. We will notify users by updating the "Last updated" date and publishing the new Terms on the official website. Continued use of MB Viewer after changes constitutes acceptance of the updated Terms.

14. Contact

For legal or terms-related inquiries:

MokingBird Oy Business ID: 3615646-1 Finland

This document is a working baseline and should be reviewed by legal counsel before production publication.

© 2026 MokingBird Oy.