Receive temporarily
The video is transferred to Cloudflare and given a random, short-lived retrieval URL.
Official artifact verification
Was this video
made with Seedance?
A free AI video detector built on the official ModelArk verification API. Upload a video to check whether it was generated by Seedance (the video model behind many AI clips online) and retrieve the model version and resolution when available.
Free — no sign-up, no accountOfficial API workflowDual-node verification
SEEDANCE DETECTOR
Video artifact check
Tag where the video came from to help the community track Seedance usage per platform
Continue only if you have the right to process this video. Temporary local uploads are deleted automatically within 24 hours.
100 MBmaximum file size
3 formatsMP4 · MOV · AVI
2 nodeschecked in parallel
≤ 24 hourstemporary storage only
How it works
Check artifact signals, not just how the video looks
The workflow uses the official ModelArk verification APIs and preserves the uncertainty stated in the returned result.
Check both nodes
Volcengine and BytePlus are queried in parallel, and their official results are combined automatically.
Explain the result
The site shows the match status, model version, resolution, channel and official result message.
Understand the result
Three outcomes, clearly bounded
Automated verification supports review decisions. It is not a legal or forensic determination.
Read the complete guide →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 detection guides
Build a defensible verification workflow
Combine official verification, source-file evidence and visual continuity checks.
Complete guide · 8 min
How to tell whether a video was generated by Seedance
A practical order of operations for official signals, metadata and visual clues.
Read the guide →Technical note · 5 minHow to read ModelArk verification results
Understand IsOfficial, Status, ModelName and the limits of a non-match.
View the note →AI detection guide · 4 minHow to check if a video is AI generated
A free online detector workflow: what to check, what the results mean, and their limits.
Read the guide →Model comparison · 5 minMiniMax H3 vs Seedance vs Kling vs Veo
The 2026 AI video models compared — and which one you can actually verify.
Read the comparison →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.
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.