An AJP file noted as .ajp may represent several formats, most commonly a CCTV/DVR export storing video in a proprietary format that regular players won’t recognize, created when someone exports footage from a chosen camera and timeframe to removable media, and usually accompanied by a special viewer like a Backup Player / AJP Player that can open and occasionally convert it.

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 typically hundreds of MB to GB and may sit beside backup utilities or viewer executables, while project-style AJP files are much smaller 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 proper step is tied to the system that made it because Windows and standard video players don’t identify it correctly, and if yours came from a DVR export, the recommended solution is to look in the same export directory for the included playback tool—names like Player.exe, BackupPlayer.exe, or AJPPlayer.exe—launch it, load the AJP, and then use its export/convert feature to obtain a normal MP4 or AVI file.

If the export folder doesn’t include a viewer, the best option is to identify the DVR/NVR brand or viewing software and get the official CMS/VMS or backup tool, as those clients often provide the only functional AJP decoder; after installation, run the client (not the AJP directly), choose its Open/Playback/Local File option, and load the footage, and if exporting isn’t supported, the only remaining workaround is a full-screen screen recording, which is imperfect but sometimes required.

For more info regarding AJP file viewer software have a look at the web page. If your AJP didn’t come from a camera system, it may belong to an older project/animation tool or a CAD/CAM workflow, meaning it opens only in the software that created it, so the best approach is to inspect the source folder for clues—such as app names, readme files, project folders, or CAD-related extensions like DXF/DWG—then install that application and load the AJP from within it, using file size as a hint since large files usually indicate CCTV footage while smaller ones suggest project/config data.

If you want quicker identification, just share the size and a few folder filenames (or a screenshot), and I can usually recognize the DVR format and guide you to the right viewer/player.