Presets for every platform
Instagram Reels, Stories and posts, TikTok, YouTube and Shorts, Facebook, X, LinkedIn, Pinterest, plus 4K, 1080p, 720p, 480p and 4:3.
Resize Video Online
Change the resolution of a video, right in your browser. Pick a preset for Instagram, TikTok, YouTube, Facebook, X or LinkedIn, or type any width and height; choose whether the picture should fit, fill, get bars or a blurred background; then download the MP4. Nothing is ever uploaded.
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Drop videos here or click to choose
MP4, MOV, AVI, MKV, WebM, WMV, FLV, 3GP… · up to 5 videos · max 500 MB each · the result is always MP4
Preview of the first video
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Everything happens in your browser: your videos are never uploaded.
Main features
A video resizer that runs entirely on your device, with the right size for every social network one click away. Trusted by content creators and marketing teams.
Fit, crop, bars or blur
When the proportions change, you decide: keep everything and get a smaller picture, crop the edges, add black bars, or fill the sides with a blurred copy of the video.
See it before you start
A live preview shows exactly how the first video will be framed at the chosen size and mode.
Any custom size
Type any width and height from 16 to 4096 pixels. Odd values are rounded to even ones, as H.264 requires.
Nothing is uploaded
FFmpeg runs inside your browser, so your videos never leave your computer or phone.
Up to 5 videos at once
Resize a batch with the same setting and download the results one by one or as a .zip.
All common formats in, MP4 out
MP4, MOV, AVI, MKV, WebM, WMV, FLV, MPEG, 3GP, TS and more. The result is an MP4 with H.264 video and AAC audio, accepted everywhere.
Free, no account, no watermark
Resize as many videos as you like. We only ask you to share the website if you find it useful.
Video sizes for every platform
The presets above use these dimensions. Platforms also accept other sizes, but these are the ones they display without cropping or scaling.
| Platform | Format | Size (px) | Aspect ratio |
|---|---|---|---|
| Instagram Reel / Story | 1080×1920 | 9:16 | |
| Instagram Post square | 1080×1080 | 1:1 | |
| Instagram Post portrait | 1080×1350 | 4:5 | |
| Instagram Post landscape | 1080×566 | 1.91:1 | |
| TikTok | TikTok | 1080×1920 | 9:16 |
| YouTube | YouTube 1080p | 1920×1080 | 16:9 |
| YouTube 720p | 1280×720 | 16:9 | |
| YouTube 4K | 3840×2160 | 16:9 | |
| YouTube Shorts | 1080×1920 | 9:16 | |
| Facebook Feed | 1280×720 | 16:9 | |
| Facebook Feed square | 1080×1080 | 1:1 | |
| Facebook Story / Reel | 1080×1920 | 9:16 | |
| X / Twitter | X / Twitter landscape | 1280×720 | 16:9 |
| X / Twitter square | 720×720 | 1:1 | |
| LinkedIn landscape | 1920×1080 | 16:9 | |
| LinkedIn square | 1080×1080 | 1:1 | |
| 1000×1500 | 2:3 | ||
| Standard resolutions | 4K UHD 3840×2160 | 3840×2160 | 16:9 |
| Full HD 1920×1080 | 1920×1080 | 16:9 | |
| HD 1280×720 | 1280×720 | 16:9 | |
| 480p 854×480 | 854×480 | 427:240 | |
| 360p 640×360 | 640×360 | 16:9 | |
| 4:3 1440×1080 | 1440×1080 | 4:3 | |
| 4:3 960×720 | 960×720 | 4:3 |
Questions and answers
Is it really free?
Yes. There is no account, no limit on the number of videos and no watermark. The website is supported by ads.
Are my videos uploaded to a server?
No. Everything is processed by your browser with FFmpeg compiled to WebAssembly. You can even disconnect from the internet once the page has loaded.
Which size should I choose?
Pick the preset of the platform you are posting to: vertical 1080×1920 for Reels, Stories, TikTok and Shorts; square 1080×1080 for feed posts; 1920×1080 or 1280×720 for YouTube and landscape posts. If you just want a smaller file, 1280×720 is a good general choice.
What is the difference between fit, crop, bars and blurred background?
They only matter when the original and the target have different proportions, for example a 16:9 video going to a 9:16 Reel. "Fit inside" keeps the whole picture and gives a smaller result (1080×608 in that example). "Crop to fill" gives exactly 1080×1920 but cuts the left and right edges. "Black bars" and "Blurred background" give exactly 1080×1920 with the whole picture in the middle, above and below either black or a blurred, enlarged copy of the video.
Does the video lose quality?
The picture has to be re-encoded to change its size, so some loss is unavoidable; "High" keeps it imperceptible at the cost of a larger file, "Normal" is what streaming platforms use. Audio is copied as it is when it is already AAC, otherwise it is converted to AAC at 128 kbps.
How long does it take?
The first time, your browser downloads the video engine (about 32 MB); it is then cached. Re-encoding in the browser runs at roughly real time for 720p and a few times slower for 1080p, so a one-minute clip takes one to three minutes. Longer videos work too; just keep the tab open.