Why this tool is useful
Add ownership, draft or review context to a short clip without revealing the source file to an upload service.
Local File Tools · runs locally
Private Video Text Watermark
Place a bounded text label on a browser-decodable clip and export WebM without uploading the source video.
Ready. Your working data stays in this browser.
Files and capture streams stay on this device. Processing uses browser APIs only; nothing is uploaded to YTSave, the media API or a proxy.
How it works
The browser measures and clamps the label, paints a translucent backing and text on every canvas frame, then records WebM.
Practical example
Mark a preview with 'DRAFT 2' in the bottom-right corner and confirm the label and position in the result report.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.