.at3 file: how to open it on Windows
1 Windows app registers the .at3 extension. Install one of them to open the file with a double-click.
About the format
- Format
- Persuasion Windows Document
- PRONOM identifier
- fmt/1707
Format data: freedesktop.org shared-mime-info and PRONOM (The National Archives, UK).
- Stellar Photo Recovery
Recover photos, audios, and video files from memory cards, cameras, hdds, ssds, etc. lost due to accidental deletion, corruption, formatting, human error, & virus attack, etc.
Related guide: Change the default app for a file type in Windows