imagetoolbox

Resize a video

Make the picture smaller, or bring an oversized clip down to something a website will accept.

  • Free
  • Runs on your device
  • No account
  • No limits

One file at a time. The video is edited on your own device, so nothing is uploaded and there's no size limit beyond what your browser can hold.

How to resize a video

  1. Drop a video in the box above.
  2. Pick a common size or type the width you want. The height follows so nothing is stretched.
  3. Download. The file keeps its name and its format, with -resized added.
  4. The first video also fetches the video engine, about 7MB, which your browser then keeps. After that it starts straight away.

About resizing video here

Type a width and the height is worked out from it, rounded to an even number, so the picture keeps its proportions and never comes back squashed. Scaling down is what this is for, and it's also the most reliable way to make a file substantially smaller without touching the quality settings.

Scaling up is possible and rarely worth it. A 720p clip enlarged to 1080p has no more detail in it than it did, and the file gets bigger for nothing. If you're trying to meet an upload limit, going the other way and combining it with compression does far more.

This edit changes the picture, so every frame has to be decoded and encoded again. Your own machine does that work, which is what keeps the file off anybody's server, and it's why a long clip takes longer than a short one. Trimming and removing the sound are the two things here that skip it entirely.

Common questions

Is the resize a video free?

Yes, properly free. No paid tier, no trial, no watermark on the result and nothing to sign up for. Put as many files through it as you like, as often as you like.

Are my files uploaded to a server?

No. The resize a video runs inside your browser, on your own machine, so your files never go anywhere. Big ones are fine too, up to whatever your browser can hold.

What size should I make a video for the web?

1080p wide is the usual answer for anything watched full screen, and 720p is plenty for a clip that sits inside a page. Going below that starts to show on a large monitor. If you're aiming at a phone feed, the width matters less than the shape, since the player scales it to the screen anyway and a vertical crop does more for how it looks.

Does resizing a video make the file smaller?

Usually by a lot, because there are fewer pixels to describe in every frame. Halving the width and the height leaves a quarter of the pixels, and file size tends to follow. It's a more predictable way to shrink a file than turning quality down, since it removes detail you can point at rather than detail the encoder decides to throw away.

What people do next

All video tools and conversions

Free to use, with no account and no limits. Everything runs in your browser, and your files never leave your device.