Video Cropper

Cut away the parts of the picture you don’t want: black bars, a messy background, a watermark in the corner — or turn a landscape video into a square or vertical one. Drag the box, pick an aspect ratio or type exact pixels. Nothing is uploaded.

  • No upload
  • Drag & snap
  • Auto remove black bars
  • Free, no watermark

Drop a video here

or

You can also paste with Ctrl+V (⌘+V on Mac).
MP4 · MOV · WebM · MKV · M4V · 3GP · TS

Your videos are processed on your device and are never uploaded.

How it works

How to crop a video

Three steps — your video stays on your device.

  1. 1

    Open your video

    Drop a video onto the page or choose it from your device.

  2. 2

    Draw the crop

    Drag the box and its corners, pick an aspect ratio like 1:1 or 9:16, or type exact pixels. Play the video to check.

  3. 3

    Crop & download

    Click “Crop video” and download the result.

Why ToolCMB

Crop videos precisely — without uploading them

Everything you need, right in the browser.

Interactive crop box

Drag, resize and nudge with the keyboard. A rule-of-thirds grid helps with framing.

Aspect presets

Snap to 16:9, 9:16, 1:1, 4:5, 4:3, 21:9 and more — perfect for social media.

Auto black bars

One click finds and removes letterbox and pillarbox bars.

Exact pixels

Type X, Y, width and height for pixel-perfect results.

Trim too

Keep only a part of the video while cropping.

Scale the result

Output the crop at its natural size or scale it to 1080p, 720p or 480p.

Private

The video is processed in your browser and never uploaded.

Free

No watermark, no sign-up, no limits.

Cropping vs. resizing — and how to crop for social media

Cropping removes part of the picture — like cutting a photo with scissors. Resizing keeps the whole picture but makes it bigger or smaller. Crop to remove unwanted areas or to change the shape of the video; resize to change its resolution.

For social media, choose the aspect ratio first: 9:16 for TikTok, Reels and Shorts, 1:1 or 4:5 for the Instagram feed, 16:9 for YouTube. Then move the box over the most important part of the scene.

The cropped video is encoded again by your browser’s hardware encoder. Keep “Same as the crop” for the sharpest result, or scale to 1080p / 720p when a platform expects a specific size.

Crop ratios for popular platforms

PlatformAspect ratioRecommended size
TikTok, Reels, Shorts, Stories9:161080 × 1920
Instagram / Facebook feed4:5 or 1:11080 × 1350 / 1080 × 1080
YouTube, Vimeo16:91920 × 1080
X (Twitter)16:9 or 1:11280 × 720 / 1080 × 1080
LinkedIn1:1 or 16:91080 × 1080
Cinematic look21:92560 × 1080

Tips

FAQ

Frequently asked questions

Can’t find your answer? Contact us — we reply quickly.

Is my video uploaded?

No. Cropping happens entirely in your browser; your video never leaves your device.

How do I crop a video to a square?

Open the video, choose the 1:1 preset and drag the box over the part you want to keep, then click “Crop video”.

Can I remove black bars automatically?

Yes. Click “Remove black bars” — the tool scans several frames and sets the crop box to the picture area.

Will cropping reduce the quality?

The kept area stays sharp; the video is re-encoded at a high quality setting. Choose “Same as the crop” to avoid scaling.

Can I crop and trim at the same time?

Yes. Turn on “Also trim the video” (or just drag a timeline handle) and select the part to keep.

Why are my numbers rounded?

Video encoders require even widths and heights, so odd values are rounded by one pixel.

Which formats are supported?

MP4, MOV, M4V, WebM, MKV, 3GP and MPEG-TS; save as MP4, WebM, MOV or MKV.

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