After Effects compatibility

Downgrade AE 2024 to AE 2021

When a project is saved in After Effects 2024, AE 2021 may reject it before loading any comps. This page is built for the specific “AE 2024 to AE 2021” workflow and links directly to the browser-based converter.

Downgrade an AEP file

Why AE 2021 rejects AE 2024 projects

The .aep file contains version signatures and project chunks written by AE 2024. Older AE 2021 builds may not understand those structures, so the project is blocked before normal editing starts.

Recommended AE 2024 to 2021 workflow

Keep the original file, create a downgraded copy for AE 2021, then open that copy in the target version and inspect comps, layers, footage paths, expressions and effects.

Compatibility limits

A version downgrade can adjust project structure, but it cannot add AE 2024-only features to AE 2021. New effects, expressions, properties or plugins may require manual replacement.

Frequently Asked Questions

Can AE 2024 be downgraded to AE 2021?+

You can generate an AE 2021 target copy, but compatibility depends on the features and plugins used in the original project.

Is the file uploaded?+

No. Conversion runs locally in browser memory.

Does it overwrite the original?+

No. The tool downloads a new .aep copy.