Video Cropper
Crop any video online for free — no sign-up, no uploads, nothing to install. Draw a custom crop area or lock to an aspect ratio, then download your cropped clip in seconds. Everything happens right in your browser, so your video never leaves your device.
Drop a video file here
MP4, WebM, MOV, AVI — up to 500 MB
How It Works
Choose your video
Drop any MP4, WebM, MOV, or AVI file. The first frame is drawn to a canvas in your browser — nothing leaves your device.
Set your crop area
Drag the handles to define the region to keep. Lock to an aspect ratio preset (1:1, 16:9, 4:3, 9:16) or draw freeform. Rule-of-thirds guides help with composition.
Crop via FFmpeg WASM
FFmpeg WebAssembly applies a pixel-accurate crop filter on your device. The audio track is stream-copied — no re-encoding, no quality loss, no server involved.
Download your clip
The cropped MP4 saves straight to your device — compatible with every platform and social network. No server round-trip ever occurs.
Your video stays on your device
Unlike cloud-based video editors, this tool never transmits your video to a server. All cropping happens inside your browser tab using FFmpeg WebAssembly — the same battle-tested FFmpeg engine used by professional broadcast software, compiled to run in a Web Worker in your browser. You can verify this by watching your network tab in DevTools — you will see zero outbound video requests after the initial FFmpeg WASM download.
The crop operation applies FFmpeg's crop=W:H:X:Y video filter, which removes the pixels outside your selected region without re-encoding the video stream. The audio track is stream-copied with -c:a copy, meaning audio is preserved at original quality with no transcoding overhead.
Common video cropping use cases
- Square for Instagram — crop a landscape video to 1:1 to fit the Instagram feed format.
- Vertical for Reels and TikTok — crop a horizontal video to 9:16 for vertical short-form platforms.
- Remove letterboxing — crop out black bars from videos recorded or downloaded with incorrect aspect ratios.
- Reframe a talking head — zoom in on a subject by cropping out the edges of a wide-angle recording.
- Remove watermarks or subtitles — crop the portion of the frame that contains unwanted overlays.
- Extract a region of interest — isolate a specific area from a screen recording or surveillance clip.
Frequently Asked Questions
Is my video uploaded to a server?
No. All cropping happens locally in your browser using FFmpeg WebAssembly. Your video files never leave your device — nothing is transmitted to a server.
What video formats can I crop?
The tool supports MP4, WebM, MOV, and AVI files up to 500 MB. MP4 (H.264) offers the best cross-browser support and is the recommended format.
Will the audio track be preserved?
Yes. Cropping only removes pixels from the video frame — the audio track is stream-copied into the output file without re-encoding, preserving full quality.
What format does the cropped video download as?
The output is an MP4 file (H.264 video) — compatible with virtually every device, platform, and social media network.
Why does the tool need to download FFmpeg (~25 MB)?
FFmpeg WebAssembly is a complete video processing engine that runs inside your browser. It handles all codecs without a server. The 25 MB download happens once and is cached — every subsequent use is instant.
Is this video cropper really free?
Yes, completely free — no account, no watermarks, no hidden fees. Because all processing runs on your own device, there are no server costs to pass on.
Privacy & Security