Crop Video Online (Free, No Upload)

Crop your video to any size or aspect ratio without uploading a thing. This tool runs in your browser, so your files stay on your device the whole time. Completely free, no account required.

Try it in your browser

Loading FFmpeg engine... (~31 MB)

How to crop video online online

1Drop your video file into the tool above, or click to browse your files.
2Set your crop area by adjusting dimensions or picking an aspect ratio preset (1:1, 16:9, 9:16).
3Click crop and download your cropped video file.

About MP4 format

Cropping a video means cutting away parts of the frame you don't want. Think of it like trimming the edges of a photo. The original content in the middle stays the same, but the video's pixel dimensions change.

People crop videos for a few reasons. You might need to remove black bars left over from a different screen size, reframe a shot to focus on one subject, or change the aspect ratio for a specific platform. TikTok and Instagram Reels use 9:16 portrait. Instagram posts use 1:1 square. YouTube is 16:9 widescreen.

Cropping is different from resizing. Resizing scales the whole frame up or down. Cropping removes pixels from the edges. And both are different from trimming, which cuts the video's length (not its frame).

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}} -vf \"crop=1280:720:320:180\" -c:a copy {{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

Crop to center square (1:1)

-i input.mp4 -vf "crop=min(iw\,ih):min(iw\,ih)" -c:a copy output.mp4

Crop to 9:16 portrait for TikTok or Reels

-i input.mp4 -vf "crop=ih*9/16:ih" -c:a copy output.mp4

Crop to 16:9 widescreen

-i input.mp4 -vf "crop=iw:iw*9/16" -c:a copy output.mp4

Crop 10% from all sides

-i input.mp4 -vf "crop=iw*0.8:ih*0.8:iw*0.1:ih*0.1" -c:a copy output.mp4

Frequently Asked Questions

Is this video cropper really free?+

Yes, completely free. No account needed, no watermark, no usage limits. Crop as many videos as you want.

Are my files safe? Do you store my videos?+

Your files never leave your device. The cropper runs in your browser, so nothing gets sent to a server. Nobody sees your video but you.

What's the maximum file size I can crop?+

There's no server-side limit because processing happens on your device. The only constraint is your browser's available memory. Most modern devices handle files up to a few gigabytes.

Can I crop a video to a square for Instagram?+

Yes. Pick the 1:1 aspect ratio preset to crop your video into a square. Works for Instagram posts, profile videos, or any platform that uses square video.

Does this work on iPhone and Android?+

Yes. It runs in any modern browser on desktop, iPhone, iPad, and Android. No app install needed.

What video formats can I crop?+

MP4, WebM, MOV, AVI, MKV, and most other common formats. Your output keeps the same format as your input by default.

What's the difference between cropping and resizing a video?+

Cropping cuts away part of the frame, like trimming the edges of a photo. Resizing scales the entire frame up or down without removing anything. If you want to change the overall dimensions without losing content, try the resize tool instead.

Privacy

Your video files never leave your device. Everything runs locally in your browser. No data gets uploaded to any server, and nothing is stored or tracked.

Related Operations

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