Crop & Resize Video

Crop a video's picture to 9:16, 1:1, 16:9 or a custom rectangle. Resize proportionally, preview the first frame and export H.264 MP4 with supported audio locally.

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Your video stays on your device — processed locally in your browser, never uploaded.

Quick Facts About Crop & Resize Video

Crop a video's picture to 9:16, 1:1, 16:9 or a custom rectangle. Resize proportionally, preview the first frame and export H.264 MP4 with supported audio locally.

Input
Supported local containers with video codecs your browser can decode
Output containers
MP4 (H.264 / AAC)
Aspect ratio preset
9:16 / 1:1 / 16:9
Output width
2–3840 px
Privacy and limits
No video upload; browser codec support and memory determine practical limits

Does cropping change the duration or sound?

Cropping removes picture edges, not time. The full clip and primary audio are retained; incompatible audio makes export fail. Output uses H.264 and AAC. Resizing keeps proportions with even-pixel rounding.

How to use

  1. Click to select
  2. Aspect ratio preset · Left · Top · Crop width · Crop height · Output width
  3. Export MP4 → Download MP4

Conversion settings

  • Aspect ratio preset
  • Output width
  • First-frame crop preview

Supported Formats

MP4 / MOV / WebM / MKV → MP4 (H.264 / AAC). Cropping removes picture edges, not time. The full clip and primary audio are retained; incompatible audio makes export fail. Output uses H.264 and AAC. Resizing keeps proportions with even-pixel rounding.

Common Use Cases

  • Reframe landscape footage for a portrait or square post.

Privacy & Browser Processing

This tool runs entirely in your browser using WebCodecs. Your video is decoded, processed and re-encoded on your device — it is never uploaded to a server, and everything is released when you close the tab.

Related Video Tools

  • Video Trimmer Online — Trim a video to one selected range with filmstrip handles and 0.1-second time controls. Preview the selection and export a frame-aligned MP4 locally in your browser.
  • Video Converter Online — Convert supported videos to MP4, WebM, MKV or MOV locally. Choose quality, resolution and frame rate, with H.264 or VP9 output and no video upload.
  • GIF to MP4 Converter — Convert animated GIFs to silent H.264 MP4 videos in your browser. Keep frame timing, choose a background color and repeat the animation 1–10 times. No upload.

Download Videos with TakeVid

TakeVid is a browser extension that detects supported video and streaming resources on many websites. Save compatible media in your browser, then edit the source clip with these local video tools.

Install TakeVid Extension

Frequently Asked Questions

Does cropping change the duration or sound?

Cropping removes picture edges, not time. The full clip and primary audio are retained; incompatible audio makes export fail. Output uses H.264 and AAC. Resizing keeps proportions with even-pixel rounding.

Will my video be uploaded?

No. Decoding and encoding happen locally in your browser via WebCodecs.