Free tool · Runs in your browser. Your files are never uploaded.
App preview video checker
Drop a video to see whether its resolution, length, size and file type match what App Store Connect accepts for app previews.
How it works
01
Drop an .mp4, .mov or .m4v file.
02
Read each check and the device classes the resolution fits.
03
Fix what failed in your editor, or make the preview in Shotcat.
Questions
The common reasons are a resolution that isn't on Apple's list, a length outside 15 to 30 seconds or more than 30 fps. Device native resolution is not accepted: 2556×1179 has to become 1920×886.
No. Browsers don't expose those without a full decode, so this tool checks what the file reports. Apple's targets are H.264 at 10 to 12 Mbps, up to 30 fps, with stereo AAC audio at 256 kbps.
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