AI Video Detector — Was This Video Made With AI?
Upload one video. DiffALL reads the Content Credentials Sora and other tools sign into their output, then checks frames from across the whole clip with a detector model.
Free, no sign-up — your file is deleted as soon as the check finishes.
Drop a video here or click to browse
MP4 · MOV · MKV · WebM — up to 150 MB, 3 minutes
Free, no sign-up — your file is deleted as soon as the check finishes. The answer is an estimate between 3 and 97, never 0 or 100.
Reading the file…
What DiffALL measures
Content Credentials, verified
OpenAI's Sora and other tools sign the videos they make (C2PA). DiffALL reads the signature and checks it against the trust list, with no network call.
Frames from the whole clip
Eight frames spread from start to end, each read by the detector, so one odd moment does not decide the answer. Each frame's own estimate is shown.
Never 0, never 100
The scale stops at 3 and 97, and the middle of it means exactly what it says: not conclusive.
Harder than a still, and it says so
Video compression smooths away much of what a detector reads, so AI video is missed more often than an AI image. The result says that beside the number.
Supported formats
Use cases
A clip that looks too good
Check whether a viral video carries a generator's signature, and what the frames look like to a model.
Before you repost
A first signal, with its reasons, before a clip goes out under your name.
Moderating uploads
Screen submitted video for declared AI generation and strong signs of it.
Frequently asked questions
How does DiffALL tell whether a video was made with AI?
It first reads the file's Content Credentials (C2PA), which OpenAI's Sora and other tools sign into their output, and checks that signature. If the file says nothing, eight frames from across the clip are read by a detector model and their estimates are combined into one number from 3 to 97.
Why is video harder than images?
Video is compressed far harder than a photo, and compression smooths away the fine detail a detector reads. Expect AI video to be missed more often than AI images, and treat a low number as “no signs found”, never as proof the clip is real.
How long can the video be?
Up to 3 minutes and 150 MB. The eight frames are spread across the whole upload, so a longer clip costs the same as a short one.
Is my video stored?
No. It is deleted as soon as the check finishes.