The file contains signals associated with a supported Seedance-generated video.
Free Seedance video detector
Was this video
made with Seedance?
Upload a video or paste a public URL. We check whether it contains Seedance generation signals and show the model version and resolution when available. Free, with no account required.
Free checkNo sign-up or accountOfficial API workflow
SEEDANCE DETECTOR
Free Seedance video check
Choose where the file was originally generated or downloaded—not the social app where you saw it. Do not guess. Listing a platform does not imply it uses Seedance.
Continue only if you have the right to process this video. Temporary local uploads are deleted automatically within 24 hours.
Freeno sign-up or account
100 MBmaximum file size
3 formatsMP4 · MOV · AVI
2 nodeschecked in parallel
What the result tells you
Check whether Seedance made the video
The check looks for signals left by supported Seedance generation. It tells you about the video's likely generator—not whether the people or events shown are real.
When available, you will also see the Seedance model version and video resolution.
Older, compressed or edited videos can lose their signals, so this result is not absolute proof.
How it works
Upload, check, get an answer
You do not need to choose a region or understand the API. The site handles the check automatically.
Add a video
Upload an MP4, MOV or AVI file, or paste a public video URL.
Run the check
We automatically check both supported Seedance verification regions.
Read the answer
See whether Seedance signals were detected, with model details when available.
Understand the result
One check, three possible results
The answer is kept simple, with an explanation when the video cannot be identified.
Learn how to read the result →Official signals detected
Possibly generated by an official ModelArk model.
No significant signals
This does not rule out Seedance as a source.
Unable to determine
Use a more original or complete source file.
Detection scope: the official API covers the Seedance model family only (Seedance 2.0+ videos, Seedream 5.0+ images) and verifies artifacts generated within roughly the last 30 days. It does not detect Sora, Kling, Runway or generic deepfakes, and re-encoding can remove the signals it relies on.
Seedance checking guides
Need help understanding a result?
Simple answers about detected, not detected and unable-to-determine results.
Seedance check guide · 8 min
How to tell whether a video was generated by Seedance
What to upload, how to run the free check and what each answer means.
Read the guide →Result guide · 5 minWhat does my Seedance check result mean?
Understand detected, not detected and unable-to-determine results.
Read the result guide →FAQ
Common questions
Short answers about formats, privacy, routing and accuracy.
How do I test if a video was made with Seedance?
Upload the video (MP4, MOV or AVI, up to 100MB) or paste its public URL, then run the check. The site submits it to the official ModelArk verification API and shows whether official Seedance artifact signals were detected, plus the model version when available.
How does the Seedance video detector work?
The site creates an official ModelArk artifact verification task, polls its result, and displays the official signal match, model name and resolution when available.
Can this prove that a Seedance video is authentic?
It can verify whether the file carries technical signals associated with an official Seedance / ModelArk output. It cannot prove that the people, events or claims shown in the video are real.
Does a negative result prove a video was not made with Seedance?
No. A negative result only means that no significant ModelArk artifact signals were detected. It does not rule out Seedance as a possible source.
Which formats are supported?
MP4, MOV and AVI files up to 100MB are supported.
Do I need to choose a verification region?
No. The system checks Volcengine and BytePlus in parallel and combines both official results automatically.
Are uploaded videos stored?
Pasted-URL copies are deleted after verification. Local uploads may be retained for up to 24 hours behind an expiring signed preview link, then are automatically deleted.
Is this an official ByteDance tool?
No. Seedance Check is an independent third-party tool. It is not affiliated with, endorsed by, or operated by ByteDance, Volcengine or BytePlus. It calls the publicly available official verification API.
Which AI models can it detect?
Only the Seedance family covered by the official ModelArk verification API (Seedance 2.0 and later video models, Seedream 5.0 and later image models). It cannot detect Sora, Kling, Runway, Veo or generic deepfakes — a negative result never means a video is not AI-generated.
Can it check NSFW or adult-content videos?
Yes. The official verification API checks artifact signals regardless of content type, so adult-content clips can be checked too. Seedance Check only verifies — it does not generate, host or distribute adult content. See the dedicated guide on checking if an NSFW video was made with Seedance.