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Video watermark

Burn a text watermark into every frame of a video - locally in the browser, no upload.

Running locally on your device ...

Watermark text
Opacity Opacity. Lower = more transparent and subtle.
Size
  • Small
  • Medium
  • Large
Position Where the element is placed on the page.
  • Bottom right
  • Bottom left
  • Top right
  • Top left
  • Center
Not the right tool? See 3 related tools

Your files

    Running locally on your device ...

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    Your files never left your device

      Continue with this file

      No re-upload needed

      These tools accept .MP4 - your file is handed over directly.

      Matches your result

      Matches your result

      Is my file uploaded?

      No. Everything runs in your browser - your file never leaves your device. How this is verifiable

      No upload100% local
      Your content stays with youno third-party access
      Hosted in GermanyGlobal Content Delivery
      Independently auditedTLS A+ · HTTP headers A+

      A copyright notice on a preview clip, a company name on a training video, or just a "draft" marker - this tool burns visible text into every frame of the video.

      Important and honest: because every frame has to be recomposed, the video is fully re-encoded (no stream copy). That needs a real hardware video encoder in the browser - without one, this tool honestly stops with an error message instead of crashing the tab or producing a broken video.

      Everything runs locally in the browser with mediabunny (MPL-2.0, self-hosted, no third-party CDN) on the browser's native WebCodecs API. Your video is not uploaded.

      Specifications

      Specifications
      Input formatsMP4, M4V, MOV, MKV, WEBM
      Auto-conversionPNG, GIF
      Output formatsMP4, WebM
      Batch processingNo
      ProcessingLocally in your browser (WebCodecs)
      File uploadNone

      In 3 steps

      1. Drop your video file (MP4, MOV, MKV or WebM).
      2. Choose the text, opacity, size and position.
      3. Download the watermarked video.

      Limitations: Text watermark only, no image logo. Needs a hardware video encoder in the browser - if none is available, the tool reports that honestly instead of crashing. Full re-encode, so it takes longer than a pure stream copy. One file per run, ~600 MB limit (the browser tab's memory limit: without streaming support the file must fit in whole, with streaming it rises to about 1 GB).

      FAQ

      Is my video uploaded?

      No. The whole watermarking happens locally in your browser.

      Why does the tool sometimes stop with an error?

      Watermarking needs a full re-encode, which requires a hardware video encoder in the browser. If missing, the tool reports that honestly instead of producing a broken result.

      Can I use an image as a watermark?

      No, only text for now.

      Does the audio change?

      No, the audio track is carried over unchanged, provided the browser has a matching codec for it.

      Does the picture lose quality?

      A small, usual re-encoding loss is unavoidable because every frame is recomposed.

      Related tools

      Rotate video · Video speed · Compress video · Video thumbnail · Merge videos · Replace video audio