How to open .PTI files on iOS
To open .PTI files on iOS, iOS is unlikely to preview .PTI in Files/Quick Look; transfer the file to a desktop system with the correct PTI-capable software/plugin, then export to a common image format for viewing on iOS.
Step-by-step instructions
- iOS is unlikely to preview .PTI in Files/Quick Look; transfer the file to a desktop system with the correct PTI-capable software/plugin, then export to a common image format for viewing on iOS.
Common issues
No app can open the .PTI file
PTI (image/prs.pti) is a specialized binary format and isn’t widely supported by default image viewers, so the OS may not suggest an app.
- Identify what software created the file and install that application or the relevant PTI plugin mentioned in the MIME registration details.
- Try opening it on a desktop OS where you can install specialized software; then export to PNG/JPEG/TIFF.
The file opens as garbled data or the wrong app launches
If the system has an incorrect file association or MIME detection rule, it may open .PTI with a text editor or an unrelated program.
- Manually choose “Open with” and pick the correct PTI-capable application (don’t rely on the default).
- On Linux, ensure your MIME database/associations are up to date (shared-mime-info is what controls this mapping).
Conversion attempts fail (renaming doesn’t work)
Renaming .PTI to .JPG/.PNG does not change the underlying binary format, so viewers and converters will still fail.
- Open the file in software that truly supports PTI and use Export/Save As to produce PNG/JPEG/TIFF.
- If you don’t have such software, ask the sender to re-export the image to a common format.
The file won’t open or reports corruption
As a binary format, .PTI can fail to parse if truncated or damaged during transfer.
- Re-download or re-transfer the file (prefer a direct file transfer instead of copy/paste through chat apps that may alter attachments).
- Ask the source to resend or re-export the file from the original application.
Security note
.PTI (image/prs.pti) is a binary format; treat files from unknown sources cautiously because malformed binary files can exploit bugs in parsers/viewers.