Seedance renders slick motion, but the flaws hide between frames: subjects that morph mid-shot, a face that flickers frame-to-frame, motion that warps as the camera pushes in, a duplicated character in the crowd, or audio that drifts off the lips. UploadCheck watches and listens to your export before you post, catches those generation artifacts, and tells your AI exactly what to re-roll.
broken videos published. Every Seedance generation gets one final pass, so a frozen frame or dropped word never reaches your audience.
instead of re-watching a 20-minute export. UploadCheck finds the one bad moment with its exact timestamp — no more scrubbing to hunt for it.
saved off every delivery. No re-export → re-upload → "why is there a black frame at 0:14" from a client after it went live.
It doesn't replace Seedance — it's the automated final QC pass on the finished export, the thing an editor can't reliably do by eye.
Same engine every way. The free scan runs 35 automated checks; a paid plan adds the AI gates (garbled speech, on-screen continuity, narration match) and lifts the hourly limit.
Use Claude Code, Codex, Cursor, or any LLM for production? Paste our one-time setup prompt and it wires a /check command. Then just say "check my Seedance generation" — the AI runs UploadCheck and reads back the findings. Free needs no key.
Export your video or audio from Seedance, then drop the file into the free scan. No account, no tools — a real PASS / BLOCK verdict with timestamps in seconds.
Start free →On a paid plan, upload the Seedance generation straight into your UploadCheck dashboard — same engine as the free scan, with every AI gate on and no hourly throttle. Paste a link or choose a file.
See paid plans →You generate and export your generation in Seedance as usual, then run the finished file through UploadCheck — from the web, the CLI, or your AI assistant. UploadCheck scans it for problems Seedance can't check, returns timestamped flags and fixes, and you re-check until it passes.
Morphing and warped motion, temporal flicker, frozen/looped frames, cloned or duplicated subjects across a shot, audio that drifts out of sync with the video, off-target loudness, and wrong resolution/codec/frame-rate — each with the exact timestamp and a fix.
No. UploadCheck is the last step after your Seedance generation — one check before you publish. It doesn't touch your Seedance project; it inspects the finished file and hands you (or your AI) a repair list.
UploadCheck doesn't fingerprint whether a clip came from Seedance — it inspects the pixels and audio for the failure modes AI video produces. Deterministic gates catch frozen/looped frames (loop_freeze), audio desync (av_sync), letterboxing and bad framing (canvas_fill), and spec/loudness issues; the paid AI oracle gates go further — twins flags a subject that got cloned or morphed across the scene, and the omni_watch and gemini_watch multimodal watchers see-and-hear the clip to surface the "something looks wrong here" moments (warping, flicker, extra fingers) that no codec-level check can measure.
Instead of re-watching a clip to hunt for the one bad moment — or worse, finding it after you've published — UploadCheck flags it in one pass with the exact timestamp. Catching one bad generation before publish saves the re-generate/re-export, re-upload, and the reputational hit of a broken clip going live.
Free with your email — 35 gates, unlimited. Add the AI gates when you're ready, from $0.025/min.