What to look for in an online project downgrader
Most online downgrading tools look like upload, pick a version, download. What actually matters is the supported range, where the file is processed, and whether the old app opens the result.
Check whether your delivery target is covered
This site covers 14 Premiere targets and 9 After Effects targets. Confirm the recipient’s installed version is in range before converting.
Know where the file goes
For client work, unreleased titles and commercial templates, file handling matters. After Effects is best suited to local browser conversion; Premiere can be self-hosted when the environment needs tighter control.
Make sure the original is never overwritten
A sensible downgrading flow always outputs a new file. If the result is not good enough, you can go back to the original and choose a closer target.
Avoid plugin-dependent handoffs
The result should be a normal project file that opens directly in the target version. Extra plugins, scripts or temporary runtime requirements make delivery less predictable.