Image Resizer
Resize photos to exact pixel dimensions or by percentage, with the aspect ratio locked or unlocked. Resizing happens in your browser.
Runs in your browser. Your data is not uploaded.
How to resize an image
- Select or drop the image you want to resize.
- Choose Pixels to enter an exact width and height, or Percentage to scale the image proportionally.
- Keep “Keep aspect ratio” ticked to avoid stretching. Change one dimension and the other updates automatically.
- Pick an output format and select Resize image. Check the new dimensions and file size, then download.
Features
Exact pixel dimensions
Enter the width and height a website, profile or form requires, for example 600 × 600 or 1080 × 1350.
Resize by percentage
Scale to 25%, 50% or 75% with one click, or enter any percentage up to 400%.
Aspect ratio lock
Keeps the proportions so faces and objects don’t look stretched or squashed.
High-quality downscaling
Large reductions are done in steps, which keeps edges smooth and avoids the jagged look of a single big resize.
Choose the output format
Keep the original format or save as JPG, PNG or WebP, with a quality setting for JPG and WebP.
Runs on your device
The image is resized in your browser and never uploaded.
Common uses
- Meet exact size requirements for passport, visa or exam photos
- Prepare images for social media posts, banners and profile pictures
- Make large camera photos suitable for websites and email
- Create thumbnails and preview images
Supported formats and limits
- Input
- JPG, PNG, WebP, GIF (first frame), BMP, AVIF
- Output
- Same as original, JPG, PNG or WebP
- Maximum output size
- 10,000 px per side, about 16 megapixels in total
- Maximum file size
- 40 MB
Related tools
Image Compressor
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Shrink a photo or scan below 50KB for forms and applications.Compress Image to 100KB
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Convert JPG or JPEG images to lossless PNG.Image to PDF
Combine JPG and PNG images into a single PDF.
Frequently asked questions
Will resizing reduce image quality?
Making an image smaller keeps it sharp, because detail is only being condensed. Making it larger can’t add detail that wasn’t captured, so enlarged images may look soft or blurry.
How do I resize without stretching the image?
Keep “Keep aspect ratio” ticked. The tool then calculates the matching height when you change the width, and the other way round.
How do I resize to an exact size like 600 × 600 when my photo isn’t square?
Untick “Keep aspect ratio” and enter both values. The image will be stretched to fit. To avoid distortion, crop the photo to a square first with your phone’s or computer’s photo editor.
Is my image uploaded?
No. Resizing happens in your browser, and the image never leaves your device.
Why is there a maximum size?
Browsers limit how large an image they can process in memory, especially on phones. The limit of about 16 megapixels works reliably on all modern devices.
Resizing versus compressing
Resizing changes the number of pixels in an image. Compressing keeps the pixels but stores them more efficiently. Making an image smaller in pixels also makes the file smaller, often dramatically: halving the width and height leaves a quarter of the pixels.
If a form asks for a maximum file size in KB rather than dimensions, use a target-size compressor instead. If it asks for both, resize first and then compress.
Common image sizes
These are typical sizes; always check the current requirements of the site you’re uploading to.
- Instagram square post: 1080 × 1080 px; portrait: 1080 × 1350 px
- Full HD wallpaper or slide: 1920 × 1080 px
- Website hero image: 1600–2400 px wide
- Email newsletter image: 600–1200 px wide