Resize video
Pick a resolution or a social size and choose how the picture fills it: whole with bars, cropped to fill, or stretched. Smaller sources are not blown up unless you ask, the bitrate follows the new size, and the sound is copied as it is.
Updated October 30, 2026
Options
How it works
- Drop one or more videos anywhere on this page.
- Choose a size such as 720p or TikTok 1080×1920, or type one.
- Press Resize video and download the result.
Which size to choose
720p is the everyday choice: it looks fine on a phone, uploads fast and keeps chat apps happy. 1080p is for YouTube, a TV or a projector. 480p and 360p are for previews and slow connections. The social presets fix the whole frame: 1080 by 1080 for a square post, 1080 by 1350 for a portrait post, 1080 by 1920 for TikTok, Reels and Shorts. A named size such as 720p sets the short side and lets the other follow the picture, so a vertical clip stays vertical.
Turning a landscape clip into a vertical one
With a fixed frame you decide what happens to the picture. Cover fills the frame and crops the sides, which is what most vertical videos want when the subject is in the middle. Fit keeps the whole picture and adds bars in the color you choose, the honest option for screen recordings and slides. Fill stretches, which almost always looks wrong; keep it for a source that was itself stored stretched. Crop video afterwards if the subject sits off-center.
Time, size and sound
Changing the resolution re-encodes the picture, so a long clip takes a while, especially on a phone; the sound is copied untouched. The bitrate scales with the number of pixels, so a downscale comes out smaller, though not to a chosen size: for a target in MB use Compress video. Up to 5 videos of up to 2 GB each run in one batch, in the source format or MP4, WebM or MKV, all on your device.
Why people use it
Free, no account
Every tool is free, with no sign-up, no e-mail address and no limit on how often you use it.
Your files stay on your device
The browser opens the file and processes it in memory, on your device. Nothing is uploaded, so nothing can be kept, leaked or looked at.
No watermark
The result is yours as it is: no watermark, no branding, no trial version.
Any device
A phone, a tablet or a computer with a current browser is enough: no app to install, no software to update.
Works offline after the first visit
The browser keeps the pages and their engines, so a tool you have opened once keeps working without a connection.
Open-source engines
The code that does the work is open-source software, named on the Licences page, running as WebAssembly in your browser.
Why it is private
Everything you type or drop here is handled by your browser, on your device. Nothing is uploaded. To verify, open your browser's developer tools, go to the Network tab, and use the tool: you will see no request carrying your data.
While a file is being processed, the counter under the result shows the page's network traffic: 0 requests and 0 B for your data.
How to check it yourself, step by step
What you can check yourself
Open your browser's developer tools on the Network tab before you drop a file: while the tool works you will see no request carrying your data, and the counter under every result shows the page's own measurement.
The site sets no cookies, so there is no cookie banner. Anonymous usage counts and error reports without file names are the only things that leave the page, as the privacy policy describes.
Every change goes through thousands of automated tests in three browser engines, including a guard that fails a test if a single byte of a file leaves the page.
Frequently asked questions
- What does 720p mean for a vertical video?
- 720p is the short side: a landscape clip becomes 1280×720, a portrait phone clip 720×1280. The other side follows the picture's own shape.
- Fit, cover or fill?
- For a fixed size like 1080×1920: Fit keeps the whole picture and adds bars in the color you choose; Cover fills the frame and crops what sticks out; Fill stretches the picture to the frame.
- Will it make a small video bigger?
- Not unless you tick Allow enlarging: enlarging adds no detail, only file size. Without it a smaller source keeps its size (a fixed frame shrinks with it) and the result says so.
- What bitrate does it use?
- The source's own, scaled to the new number of pixels, so a downscale gets smaller and does not look worse than what came in.
- Does my video get uploaded?
- No. Scaling and encoding run in your browser; the video never leaves your device.
- Does resizing make the video smaller?
- Usually yes when you go down in resolution, because the bitrate follows the pixel count. For a specific size limit, resize here and then use Compress video, which aims at megabytes.
- Can I resize a video on my phone?
- Yes, in the browser. Short clips are fine; a long 4K video takes a while and some battery, so plug the phone in or use a computer for those.
- Which format comes out?
- The same as the video by default. You can choose MP4 (plays everywhere), WebM (browsers and Android) or MKV (desktop players); the sound is copied when the format can hold it.
- Can I set a custom size like 800 by 600?
- Yes. Choose Custom size and type the width and height; put 0 in one of them to let it follow the picture's shape.
- Does it change the aspect ratio?
- Not with a named size such as 720p, nor with Fit or Cover. Only Fill stretches the picture to the frame.
Install it as an app
Chrome, Edge and Android browsers offer to install this site from the address bar or the menu; on iPhone use Share, then Add to Home Screen. It opens like an app, keeps working offline and still processes everything on your device.