Video Resizer
Set an exact even-numbered width and height, choose how the video fits, and download an MP4. No upload or account is required.
More private browser video tools
Edit or convert one video without sending it to an Instasize processing server. Codec support and processing speed depend on the browser and device.
Edit video
Resize video dimensions and aspect ratio
Exact dimensions
Enter an even-numbered width and height up to 4096 pixels per edge and 8,847,360 total pixels. Even dimensions improve MP4 encoder compatibility.
Contain, cover, or stretch
Contain preserves the complete frame and may add empty space. Cover fills the output and crops edges. Stretch fills both dimensions but can distort the image.
Re-encoded result
Resizing creates a new MP4 rather than changing display metadata. Inspect framing, detail, and text legibility at the final size.
Output, privacy, and compatibility
Private processing
The selected video is read and processed in this browser with MediaBunny. This workflow does not upload the video to an Instasize processing server.
MP4 output
Completed edits download as MP4 files with AVC video and AAC audio when audio is retained. Re-encoding can change file size and visual quality.
Browser limits
Codec support, speed, and memory limits vary by browser and device. Keep the original file and review the complete result before deleting or publishing anything.
How to resize a video online?
- 1
Step 1: Choose a video
Select one supported video up to 200MB.
- 2
Step 2: Set the size
Enter an even width and height in pixels.
- 3
Step 3: Choose the fit
Use contain, cover, or stretch for the intended framing.
- 4
Step 4: Resize and download
Review the result and save the resized MP4.
One of my go-to apps
Great app for filtering photos and even greater app for sizing pictures for not only posts but story photos as well... love this app I mainly use insta size for all my posts now ;)
Fast and Straightforward
Resizing photos for social media should be a cinch, but most editing programs are a pain to use. Of the dozen I’ve used, Instasize is the fastest, easiest and most consistent...
Great Sizes
Perfect app for the exact social media picture sizes. Love it. I use it daily. & I like the premade options they give you for different social medias!
I love instasize
Its the best app. for sizing photos to fit for Instagram or other forms of social media. You can also edit photos and create collages with multiple photos. It’s had been my friend for several years!
Always helpful
Always helpful when needing to resize photos
Huge fan
I love this app. Makes posting all types of photos. Love how it makes them fit on different formats
I’ve been using for years. Can’t work without it.
I use this app everyday to perfectly resize images for all of my social media platforms
LOVE
This app saved the day for me! I’m finally able to resize my photos for IG....effortlessly
Great App
We use this App weekly to resize pics for social media posts. Very user friendly, easy to use program when you want to get in and out quickly...
Yes. Choose Contain to preserve the complete frame. If the target aspect ratio differs, the result may include empty space around the video.
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