AI Video Detector
Upload any video and find out if it was made by AI or contains a deepfake. Detects face swaps, AI-generated scenes, and temporal manipulation.
Three steps. One answer.
Upload a video
MP4, up to 50 MB. For videos longer than 30 seconds, a built-in trimmer lets you select the segment to analyze.
Multiple models analyze frame-by-frame
Specialized detectors examine sampled frames for generative artifacts, facial inconsistencies, and temporal anomalies.
Get a verdict with confidence score
Real, Synthetic, or Uncertain. Plus a plain-language explanation of what was found and which frames triggered the detection.
Two categories of video manipulation.
Face swap deepfakes
Face replacement, reenactment, and lip-sync manipulation. Detected by temporal analysis across 32 frames that identifies inconsistencies in facial geometry, blending boundaries, and motion coherence.
AI-generated video
Full synthetic video from Sora, Runway, Kling, Veo, and other generators. Detected by spatial artifact analysis that identifies patterns left by video generation models.
Check videos from anywhere.
Upload a video file directly, or use the Chrome extension to scan videos on any website. Works wherever you watch.
How Witness compares.
Most AI detection tools only support images. Here is how video detection stacks up across the tools that exist today.
| Capability | Witness | Hive | AI or Not | Illuminarty | SightEngine |
|---|---|---|---|---|---|
| Video support | Yes | Yes | No | No | No |
| Face swap detection | Yes | No | No | No | No |
| Frame-by-frame analysis | Yes | Unknown | N/A | N/A | N/A |
| Chrome extension | Yes | Yes | No | No | No |
| Max video length | 50 MB (trimmer) | Unlimited (API) | N/A | N/A | N/A |
| Price | $15/mo | Free ext / API paid | From $10/mo | Free + paid | From $23/mo |
Data as of September 2026. Features and pricing may have changed. If you spot an error, email us at support@witness.vision.
Common questions.
Can AI-generated videos be detected?
Yes. AI-generated videos contain temporal and spatial artifacts that trained detection models can identify. Frame-by-frame analysis reveals inconsistencies in motion, lighting, and facial geometry that are invisible to the human eye but measurable by specialized detectors.
How does deepfake video detection work?
Witness extracts frames from the video and analyzes them with multiple detection models. For face swap deepfakes, temporal analysis across 32 frames detects inconsistencies in facial geometry, blending boundaries, and motion coherence. For fully AI-generated video, spatial artifact analysis identifies patterns left by generators like Sora, Runway, and Kling.
What types of video deepfakes can Witness detect?
Witness detects two main categories: face swap deepfakes (face replacement, reenactment, and lip-sync manipulation) and fully AI-generated video (synthetic scenes created by tools like Sora, Runway, Kling, and Veo). Both categories are analyzed using different specialized models.
How long can the video be?
Videos up to 50 MB can be uploaded. For videos longer than 30 seconds, a built-in trimmer lets you select the segment you want analyzed. The detector samples frames across the selected segment for thorough coverage.
Check any video. Know what you are watching.
Upload a video and get a clear answer. Face swap or AI-generated, Witness tells you what is real.