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Terms of Use

Undoyear is a free tool. Keep your original files, check the copies in After Effects, and respect other people's work.

Last updated: November 8, 2026

Using Undoyear

Undoyear converts After Effects project files so older versions of After Effects can open them. You may use it for personal, educational and commercial work, as long as you follow these terms.

Keep your originals

A converted file is a new copy. Always keep your original project. Open every converted copy in After Effects and check it before you rely on it. Versions marked untested have not had a converted file opened in them yet, so use them with extra care.

Your files and other people's rights

You are responsible for the projects you convert. Converting a project doesn't give you any rights to the footage, fonts, plug-ins or other material it uses. Only convert and share projects you own or are allowed to use.

No warranty

Undoyear is provided "as is", without warranty of any kind. A converted project may not open, or may look or behave differently, especially where it uses features the older version doesn't have. The project report lists known things to check, but it can't promise to catch everything.

Limitation of liability

To the fullest extent the law allows, Undoyear and its contributors are not liable for any damages arising from your use of the site, including lost work or data.

Trademarks

After Effects and Adobe are trademarks of Adobe. Undoyear is an independent tool and is not affiliated with, endorsed by or sponsored by Adobe.

Open source

The file-format knowledge and test files come from py-aep by Fortiche production, under the MIT licence. The Inter typeface is used under the SIL Open Font License.

Changes

These terms may change from time to time. The date at the top shows the latest version. Continuing to use Undoyear after a change means you accept the updated terms.