Add Watermark to Video (Free, Online, No Upload)

Add a watermark or logo to any video right in your browser. Nothing gets uploaded to a server. Position your image overlay anywhere on the video with full control over size and opacity. The processing runs locally using FFmpeg compiled for your browser.

Try it in your browser

Loading FFmpeg engine... (~31 MB)

Use the API

curl -X POST https://renderio.dev/api/v1/run-ffmpeg-command \
  -H "X-API-KEY: ffsk_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
  "ffmpeg_command": "-i {in_video} -i {in_video} -filter_complex \"overlay=W-w-10:H-h-10\" {out_video}",
  "input_files": {
    "in_video": "https://example.com/input.mp4"
  },
  "output_files": {
    "out_video": "output.mp4"
  }
}'

Need an API key? Get your free API key to start processing files programmatically.

Common Variations

Top-left corner

-i input.mp4 -i watermark.png -filter_complex "overlay=10:10" output.mp4

Center with opacity

-i input.mp4 -i watermark.png -filter_complex "[1:v]format=rgba,colorchannelmixer=aa=0.3[wm];[0:v][wm]overlay=(W-w)/2:(H-h)/2" output.mp4

Text watermark

-i input.mp4 -vf "drawtext=text='RenderIO':fontsize=24:fontcolor=white@0.5:x=W-tw-10:y=H-th-10" output.mp4

Scaled watermark (20% of video width)

-i input.mp4 -i watermark.png -filter_complex "[1:v]scale=iw*0.2:-1[wm];[0:v][wm]overlay=W-w-10:H-h-10" output.mp4

Related Operations

Overlay Video Online Free, No Upload | RenderIO Add Subtitles to Video Online Free, No Upload | RenderIO Resize Video Online Free, No Upload | RenderIO Compress Video Online Free, No Upload Required | RenderIO

Need to process at scale?

Automate this with the RenderIO FFmpeg API. Process thousands of files programmatically or through no-code video automation.

Get your API key