An AJP file saved as .ajp may refer to multiple formats depending on what created it, so its origin is the key clue, with the most common case being CCTV/DVR backups where the system saves recorded footage in a proprietary container that typical video players don’t support, produced when a user selects a camera and time range to export, usually writing the file to a USB stick or disc along with a viewer like a Backup Player or AJP Player that can play the footage and sometimes convert it to a standard format.

If an AJP file didn’t come from a camera system, it may show up as a project/save file from older tools like Anfy Applet Generator for Java-based website animations or appear in CAD/CAM contexts such as Alphacam, meaning it isn’t video, and you can usually identify which kind you have by checking file size and nearby files—CCTV exports are very large and may sit beside backup utilities or viewer executables, while project-style AJP files are often modest in size and appear with website or CAD/CAM assets, and a quick check of the file’s Properties or a safe peek in a text editor (without saving) can reveal readable text for project/config files versus mostly unreadable binary data for DVR containers.

To open an .AJP file, the right solution hinges on what generated it because Windows and everyday media players won’t open AJP formats on their own, and when the file is from a CCTV/DVR backup, the safest method is to launch the bundled viewer/player—often included in the same export folder and named something like Player.exe or BackupPlayer.exe—then load the AJP inside that tool and use its built-in export or convert option to obtain a normal video file like MP4 or AVI.

If no viewer is bundled, the next step is to figure out the DVR/NVR brand and model—or at least the software used for live viewing—and download the official CMS/VMS/backup viewer from that vendor, since many CCTV systems rely on their own PC client to decode AJP files, and once installed you should open the client first, use its Open/Playback/Local File option to load the AJP, and if it plays but offers no export feature, the final fallback is to screen-record the footage full screen, which isn’t ideal but can be necessary for older locked formats.

If the AJP didn’t originate from surveillance equipment, it might relate to outdated animation tools or CAD/CAM software, meaning it requires the original application to open it, so check the surrounding folder for hints such as project-related filenames, readmes, or CAD formats like DXF/DWG, then install the correct program and open the file through it, noting that smaller sizes usually fit project files while very large sizes resemble CCTV containers.

If you like, simply provide the file size and list a few of the files in the same folder—or share a screenshot—and I can typically see if it’s a surveillance export and recommend the most likely working player.