How to resize an image
- 1 Drop your images into the box, or press browse.
- 2 Choose By pixels or By percentage.
- 3 Enter a width, a height or both, or pick a preset such as Instagram post.
- 4 Press Resize to download the resized images.
Pixels, file size and picture quality
Resizing changes how many pixels an image has. Making it smaller always works well, because the tool averages detail you would not see anyway. Making it larger cannot add detail that was never captured, so an enlarged small photo looks soft.
- Keep the aspect ratio unless a form demands exact dimensions, or faces and logos will look stretched. If the shape must change, crop first instead.
- Common sizes: Instagram portrait 1080 × 1350, square posts 1080 × 1080, YouTube thumbnails 1280 × 720.
- File size follows pixels: halving both sides leaves a quarter of the pixels, so the file usually shrinks by about three quarters.
If you only need a smaller file and not a particular width, Compress Image is quicker.
Features
Exact pixels
Set the width, height or both.
Three fit modes
Keep proportions, fill and crop, or stretch.
Social media presets
Instagram, stories, Facebook, X and YouTube sizes.
Batch resize
Resize many images in one go.
When to use it
Social media
Get the right size for posts and covers. Need a different shape rather than a smaller one? Crop Image does that.
Websites
Resize images for banners and blogs. After resizing, Compress Image makes the file even lighter.
Forms
Meet exact pixel sizes for uploads. For a form with a size limit as well, use Compress Image to 50KB.
Printing
Prepare images for a print size. Turn the photo the right way first with Rotate Image.
Related Image tasks
Frequently asked questions
Are my images uploaded to a server?
No. Your images are processed by your own browser and never leave your device, so private photos, ID cards and documents stay private. Once the page has loaded, the tool even works offline.
How do I resize without stretching?
Enter just a width or a height, or keep the Keep proportions option. The other side is worked out automatically.
What does Fill and crop do?
It fills the exact size you entered and trims the edges evenly, like social media apps do, so nothing is stretched.
Can I make an image bigger?
Yes, but enlarging cannot add real detail, so large increases can look soft.
What size is best for Instagram?
1080 × 1080 for square posts, 1080 × 1350 for portrait posts and 1080 × 1920 for stories and reels.
Does resizing reduce file size?
Making an image smaller in pixels usually reduces its file size a lot.
Can I do many images at once?
Yes. Drop as many images as you like. One image downloads on its own, and several come together in a single ZIP file.
Which format will I get?
The same as the original by default. You can also choose JPG, PNG or WebP.
Is it free?
Yes. There is no sign-up, no watermark and no daily limit.
Does it work on my phone?
Yes. It works in Chrome, Safari and other modern browsers on Android and iPhone. Pick photos straight from your gallery or files.
Does it keep the photo's orientation?
Yes. Phone photos are turned the right way up before resizing, so portrait photos stay portrait.
What is the difference between resizing and cropping?
Resizing changes the size of the whole picture. Cropping cuts away part of it. Use our Crop Image tool to choose exactly which part to keep.
Can I resize a photo on my phone?
Yes. Choose the photo from your gallery, enter the new size and the resized image downloads straight to your phone.
How this tool works. These image tools run entirely in your browser using the Canvas API built into every modern browser, the open-source libheif decoder for iPhone HEIC photos and Tesseract, a widely used open-source OCR engine, for reading text. Each tool is tested with real phone photos, screenshots and scans before it goes live, and nothing you open is sent to a server.
Built and reviewed by Hamza Farooq, founder and lead developer
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