How do I crop a video to square?

Add your video, choose the 1:1 square ratio, and tap Crop video. The preview shows the square framing before you download.

Is my video uploaded to a server?

Never. Everything runs locally in your browser. Your file never leaves your device.

How do I make a video vertical for TikTok or Reels?

Choose the 9:16 vertical ratio. Sondra crops the center of your video to a tall 9:16 frame that fills the phone screen.

Can I crop and resize at the same time?

Yes. Pick an aspect ratio to crop and an output size to scale down, and Sondra does both in one step.

Where does it crop from?

Sondra crops from the center of the frame, keeping the middle of the picture.

Will cropping reduce the quality?

Cropping and resizing re-encode the video at a high quality, so the result still looks sharp. Resizing to a smaller size naturally has fewer pixels.

Which formats are supported?

You can crop MP4, MOV, MKV, WEBM and AVI files. The result is saved as an MP4.

Yes. Cropping and resizing videos on Sondra is free, with no signup and no watermark.

Can I crop a video on my phone?

Yes. Sondra works in mobile browsers, with files up to 100MB on mobile and 500MB on desktop.

Crop and Resize Video Online

Crop your video to a square, vertical or any aspect ratio and resize it to a smaller resolution. Free, private, and right in your browser.

Drop a video here or click to upload

MP4, MOV, MKV, WEBM, AVI

Up to 500MB on desktop, 100MB on mobile

Fast 100% private Free

How to crop a video

Add your video

Drop in or pick the clip you want to crop or resize. It stays on your device.

Pick a ratio or size

Choose an aspect ratio like square or vertical, and a smaller output size if you want. The preview shows the framing.

Download

Save your cropped video, ready to post.

Why crop or resize a video?

Every platform wants a different shape. Instagram likes square and 4:5, Reels, TikTok and Shorts want tall 9:16, and YouTube is widescreen 16:9. Cropping reframes your video to the right ratio so it fills the screen instead of sitting in a small box with black bars around it.

Resizing is about the resolution. Scaling a clip down from 4K or 1080p to 720p or 480p makes the file much smaller and faster to upload or send, which is handy for email, messaging, or saving storage. You can crop, resize, or do both at once.

Sondra crops from the center and keeps the quality high, with no watermark. It works with MP4, MOV, MKV, WEBM and AVI, and everything happens in your browser, so nothing is uploaded.

What you can do by cropping and resizing

Reframing or shrinking a video solves a lot of everyday problems. Here are the most common ones.

Make a square video

Crop a clip to 1:1 for an Instagram feed post or a profile video.

Go vertical for Reels

Crop a landscape clip to 9:16 so it fills the screen on TikTok, Reels and Shorts.

Remove black bars

Crop away the letterbox bars around a video so the picture fills the frame.

Shrink the resolution

Resize a big 1080p or 4K clip down to 720p or 480p for a smaller, faster file.

Crop video for any platform

Each platform has its own ideal shape. A quick guide to the most popular ones.

Instagram

Use square 1:1 or portrait 4:5 for the feed, and 9:16 for Stories and Reels.

TikTok and Shorts

Crop to vertical 9:16 so the video fills the whole phone screen.

YouTube

Keep landscape 16:9 for regular videos, or 9:16 for YouTube Shorts.

Twitter and Facebook

Square 1:1 plays well in the feed and takes up more space than landscape.

Private by design

Most online croppers and resizers upload your video to a server first. Sondra does not. All the work happens inside your browser on your own device, so your video is never sent anywhere and nobody else can see it.

That also means there is no waiting for a long upload, no account to create, and no limit on how many videos you crop. Close the tab and nothing is left behind.