Resize Image
Resize by pixels or percent, keep proportions, or fit social media sizes.
Drop images here
or select to choose from your device
Files are processed on this device. Nothing is uploaded.
How to use Resize Image
- Add one or more images.
- Choose a preset (YouTube, Instagram…) or enter a width, height or percentage.
- Select Resize images and download the results.
How it works
Resizing keeps the proportions unless you choose Exact size. Fill a box scales the image to cover the target and trims the overflow from the centre, which is how most social media crops work. Downscaling is done in steps of at most half the size each, with the browser’s high-quality smoothing, which avoids the jagged edges of a single large jump.
Enlarging an image cannot add detail that was not captured; a small image scaled up will look soft. For best results, start from the largest original you have.
Example
A 4000×3000 photo resized to width 1280 becomes 1280×960. With the YouTube preset (fill 1280×720) the top and bottom are trimmed equally to make a 16:9 frame.
Frequently asked questions
How do I resize without losing quality?
Downscaling always discards pixels, but with high-quality smoothing and quality 90% or higher the result looks sharp. Avoid enlarging, and keep PNG for graphics with text.
What size should an Instagram post be?
1080 px wide: 1080×1080 for square and 1080×1350 for portrait. Platforms change their recommendations, so check their current guidelines.
Can I resize many images at once?
Yes. Add as many as you like; all get the same settings and can be downloaded as a ZIP.
Are images uploaded?
No. Resizing happens in your browser.
Limitations
- Animated GIFs become a single frame.
- Platform size recommendations change; presets reflect common sizes as of November 2026.
Last reviewed November 9, 2026. How we build and test tools.