Resize images to exact dimensions or scale them by percentage. Upload an image, set the new width and height, and download the resized result — free and private, right in your browser.
Everywhere you put a photo online, it has to be a certain size. A profile picture needs to be square, a website banner needs to be wide, a form asks for an image no bigger than 500 by 500 pixels, and a photo straight from your phone is far too large for any of them. Resizing by hand in a photo app takes several steps — this tool does it in seconds, to the exact dimensions you type in.
Image Resizer
Resize an image to an exact width and height, with or without keeping the aspect ratio.
🔒 Privacy: this tool runs entirely in your browser. Your files and text never leave your device — nothing is uploaded to any server.
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What is Image Resizer?
Image Resizer is a free online tool that changes the width and height of an image. You can set exact dimensions in pixels — for example, 800 by 600 — or scale the image by a percentage, such as 50% of its original size. You can also choose the output format: PNG, JPEG or WebP.
The tool runs entirely in your browser. Your images are processed on your own device and are never uploaded to a server, so your photos stay private. It works on Windows, Mac, Chromebook, Android and iPhone — anything with a modern web browser.
What you can use it for
- Profile pictures: resize a photo to the exact square size a social network or job site asks for.
- Websites and blogs: shrink large photos so your pages load faster for visitors.
- Forms and applications: meet the exact dimension limits of ID, visa or school application forms.
- Sharing by email: make big phone photos small enough to attach and send.
- Changing format: save the resized image as PNG, JPEG or WebP in the same step.
How it works
- Click Choose File and select the image you want to resize.
- Enter the new Width and Height in pixels — keep Keep aspect ratio ticked to avoid stretching the image.
- Choose an Output format: PNG, JPEG or WebP.
- Click Resize Image, then download the resized image.
Frequently asked questions
Is Image Resizer free?
Yes, it is completely free to use, with no account or sign-up needed. There is no watermark added to your image.
Are my images uploaded anywhere?
No. Resizing happens in your browser, on your own device, so your images are never uploaded to a server or stored by us. Closing the page removes them from your browser session.
What is aspect ratio, and why should I keep it?
Aspect ratio is the relationship between an image’s width and height — a photo that is twice as wide as it is tall has a 2:1 ratio. If you change one side without the other, people and objects in the photo look stretched or squashed. Keeping “Keep aspect ratio” ticked adjusts the other side automatically, so the picture keeps its natural shape.
Which output format should I choose?
For photos, JPEG or WebP give the smallest files. For screenshots, logos or images with text, PNG keeps edges sharp. WebP is the modern choice for the web because it is small and widely supported — you can also convert between formats with the JPG to WebP and WebP to JPG tools.
Good to know
- Making an image bigger than the original does not add detail — it just stretches the pixels you already have. Resize down for the best results.
- Keep your original file. Work on a copy so you can always go back to the full-size image.
- If the resized image is still too large a file, shrink it further with the Image Compressor.
Related tools
Try the Image Compressor, Image Cropper or JPG to WebP tools, or browse all free tools on VerySimple.