You can export screenshots directly from After Effects’ Composition panel.

aeJPG simplifies the process of taking screenshots from After Effects’ Composition panel. Particularly good for social media or to send to your clients.

You can use the script to export screenshots in any still image format After Effects supports, including JPEG, PNG and TIFF. Now,  it is possible to do so with a single click, directly inside After Effects.

click the link below to get the free script