Does Cropping Stretch The Video?

No. The selected rectangle becomes the output frame without stretching. Use Video Resizer afterward if a separate exact canvas size is required.

Why Are Crop Values Even Numbers?

Many delivery codecs use chroma subsampling that expects even frame dimensions. The tool applies documented even-pixel geometry rather than producing a fragile odd-sized export.

Is The Video Uploaded?

No. The selected file remains local; only the FFmpeg processing code downloads on first use.

Video Cropper

Crop video to exact even-pixel coordinates or centered social, widescreen, portrait and cinema aspect presets.

Local processing: your media stays on this device.First export downloads about 31 MB of FFmpeg WebAssembly

01 · Source

Source Video

Set an exact even-pixel crop or center a delivery aspect preset.

Drop a video hereor choose a local file · maximum 250 MB / 30 minutes

02 · Settings

Output Controls

Settings are validated before the runtime starts.

Aspect Preset

X PositionY PositionCrop WidthCrop Height

Applied frame: Open a source · even-pixel geometry

Output ContainerQuality (CRF 24)Lower values preserve more detail and make larger files.

Remove Container MetadataInclude Primary Audio

03 · Output

Output Workspace

The completed file and processing receipt will appear here.

Open a source, confirm the settings, then run Crop Video.

Codec note: exports run in FFmpeg WebAssembly after a first-use download of about 31 MB. The 250 MB / 30 minutes picker ceiling is not a success guarantee: the complete source and output occupy browser memory, available decoders vary, and large 4K or unusual-codec media may still fail. Processing uses a duration-aware 5–45 minute job timeout. Fast trimming follows source keyframes and is not frame-perfect; re-encoded timing can still vary slightly on variable-frame-rate media.

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What Is the Video Cropper?

The Video Cropper is a private frame-recomposition workspace for moving and sizing an exact crop rectangle across an entire video. It includes freeform even-pixel geometry plus centered 1:1, 4:5, 3:2, 4:3, 16:9, 9:16 and 21:9 presets, a live crop mask, MP4 or WebM delivery, primary-audio retention, quality controls, metadata removal and a versioned JSON receipt with the applied geometry and filter.

How It Works

Open a browser-readable video, select an aspect preset or enter X, Y, width and height in pixels, check the masked source preview and planned output dimensions, then choose delivery format and quality. Cropping requires a re-encode; the first export downloads about 31 MB of FFmpeg WebAssembly while the source stays on the device.

When to Use It

Use it to reframe landscape footage for square or vertical delivery, remove unwanted frame edges, isolate a region of interest or prepare a precise editorial crop. Crop dimensions and offsets are normalized to even pixels for broad H.264 and YUV 4:2:0 compatibility.

Frequently Asked Questions

Does Cropping Stretch The Video?: No. The selected rectangle becomes the output frame without stretching. Use Video Resizer afterward if a separate exact canvas size is required.
Why Are Crop Values Even Numbers?: Many delivery codecs use chroma subsampling that expects even frame dimensions. The tool applies documented even-pixel geometry rather than producing a fragile odd-sized export.
Is The Video Uploaded?: No. The selected file remains local; only the FFmpeg processing code downloads on first use.

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