How to Remove the Runway Watermark From Gen-3 and Gen-4 Video

By Calabi Labs Editorial Team · 2026-08-03

To remove the Runway watermark, first crop out the corner logo if your export has one, then run the file through Calabi to strip the invisible layer that actually flags it — the C2PA "made by AI" manifest, XMP AI tags, and encoder fingerprints — and inject a real phone-capture identity. Cropping alone leaves the metadata behind, and that metadata is what platforms scan.

What actually flags your file

A Runway Gen-3 or Gen-4 export carries more than a visible logo. The file ships with a C2PA / Content Credentials manifest — a signed "made by AI" record stored as a JUMBF block inside the file. Platforms read that manifest directly; it survives cropping, trimming, and re-uploading.

On top of that, the container holds XMP flags like DigitalSourceType: trainedAlgorithmicMedia, generator and tool tags naming the model, and encoder fingerprints such as Lavc or x264 SEI data left by the render pipeline. None of these are visible on screen, and all of them are trivially machine-readable.

The visible corner mark is the part most people fix. The metadata is the part that keeps getting them flagged after they thought they were clean.

How Calabi handles it

Calabi is a one-pass file tool, not a video editor. It does not paint over or reconstruct any part of your frame. For a visible Runway logo in the corner, the honest fix is a crop — Calabi does not erase logos pixel by pixel. What Calabi does is remove the invisible detection and metadata layer that a crop leaves untouched.

Stage one strips the signals: the C2PA/JUMBF manifest, the XMP trainedAlgorithmicMedia flag, generator tags, and encoder SEI fingerprints. Stage two injects an authentic phone-capture identity — Make, Model, Software version, GPS coordinates, a capture timestamp, and a real-phone encoder name. Device profiles include iPhone 17 Pro Max, iPhone 16 Pro, iPhone 15 Pro, Pixel 8 Pro, and Galaxy S24 Ultra. Stage three returns a forensic proof card so you can see it worked before you download.

In verified runs, ExifTool showed 18 JUMBF/C2PA atoms reduced to 0 and 16 C2PA references reduced to 0, with the trainedAlgorithmicMedia flag gone.

The steps:

Upload your Runway export.
Calabi automatically strips the AI signals and injects a phone-capture identity.
Review the forensic proof card showing what was removed and added.
Download the cleaned file.

FAQ

Does cropping remove the Runway watermark completely?

Cropping removes the visible corner logo, but not the C2PA manifest, XMP AI flags, or encoder fingerprints stored inside the file. Those survive the crop and are exactly what platforms scan. Calabi removes that invisible layer.

Will my Runway video look different after Calabi?

No. Calabi works on invisible signals and metadata, not on how the image looks. It does not re-touch, repaint, or reconstruct any region of the frame — the picture you see stays the same.

Can you guarantee a platform won't flag my video?

No tool can. Results vary by platform and source model. Calabi removes the metadata and provenance signals that most commonly get files flagged, but there's no universal guarantee.

Try Calabi free at calabilabs.com — 10 cleans, no card.