An AJP file with extension .ajp changes meaning depending on its creator, usually showing up as a CCTV/DVR backup where the device saves video in a proprietary container that VLC or WMP can’t play, generated after selecting a camera and date/time for export to USB/CD/DVD, and typically relying on a companion viewer such as a Backup Player or AJP Player to view and sometimes convert the footage.
If the file wasn’t generated by a camera system, an AJP may belong to older software like Anfy Applet Generator or show up in CAD/CAM workflows such as Alphacam and therefore isn’t video, and you can usually tell which type you have by comparing file size and companion files—CCTV exports are often hundreds of MB or more and may include viewer programs, while project-style AJP files are lightweight and appear with web or CAD assets, and checking Properties or opening it in a text editor briefly can show readable text for project files versus gibberish-like binary for DVR footage.
To open an .AJP file, you need a method that matches its creator, since Windows and typical video software won’t recognize it, and if it’s a CCTV/DVR export, your best bet is the viewer/player supplied with the footage—often located in the same folder and named something like Player.exe or BackupPlayer.exe—which you can launch to load the AJP and then use its built-in export/convert tools to save out an MP4 or AVI.
If the AJP came without a viewer, the next logical step is to figure out the manufacturer and install the vendor’s CMS/VMS/backup viewer, since many systems decode AJP only through their own PC client; once set up, open the client itself and load the AJP via its Open/Playback/Local File feature, and if playback works but exporting doesn’t, your final fallback is to record the footage from the screen, which is time-intensive but can be necessary for older or locked-down formats.
If the AJP file doesn’t trace back to a DVR, it may originate from older animation/app-creation tools or CAD/CAM workflows, requiring the same program that made it, so look around its folder for identifying app names, documentation, or related file types like DXF/DWG, then open it inside the correct software, noting that file size can guide you—tiny files usually mean project/config content, while huge ones are often CCTV backups.

