Resize Image
Change an image's dimensions in pixels, percent, centimetres, millimetres, or inches, with the aspect ratio locked or free.
Image Resizer: Change Photo Dimensions in Pixels, CM, MM, or Inches
Resize a photo to exact pixel dimensions for a profile picture or a web banner, scale it by percentage, or work in centimetres, millimetres, and inches with a DPI setting for print. Lock the aspect ratio to avoid stretching, or unlock it to hit a fixed size like 300 × 300. Presets cover the sizes people ask for most, and everything is rendered on canvas in your browser, so the original file is never uploaded.
How to Resize an Image
Upload your image
Choose a JPG, PNG, WebP, or GIF file. The tool shows its original dimensions and file size straight away.
Enter the new size
Pick a unit, type a width or height, and leave the lock on to keep the proportions. Presets like 300 × 300 and 1920 × 1080 are one tap away.
Download the resized image
Choose an output format and quality, then save the file at exactly the dimensions you set.
Popular Reasons to Resize a Photo
- Passport and document photos that must be an exact pixel or millimetre size
- Profile pictures and avatars sized to a platform's recommended dimensions
- Web banners, hero images, and thumbnails that need consistent proportions
- Print layouts measured in centimetres or inches at 300 DPI
- Shrinking camera photos before emailing or archiving them
- Preparing product images to the exact size a marketplace requires
Image Resizing FAQ
Will resizing distort my photo?
Not while the aspect ratio lock is on - typing a width fills in the matching height automatically. Unlock it only when you deliberately need a fixed size such as a square 300 × 300.
How do centimetres and inches translate to pixels?
Through the DPI setting. At 96 DPI (the screen default) one inch is 96 pixels; at 300 DPI, which is typical for print, one inch is 300 pixels. Change the DPI field and the output pixel size updates.
Can I make an image larger?
Yes, you can enter dimensions bigger than the original. Enlarging cannot add detail that was not captured, so the result will look softer than the original.
Is my image uploaded to a server?
No. The resize is drawn on an HTML canvas in your browser, so the file never leaves your device.
Which output formats are available?
JPG, PNG, and WebP. Keeping the original format is the default; switch to JPG or WebP if you also want a smaller file.
Does resizing also reduce the file size?
Usually yes, since fewer pixels means less data. If you need to hit an exact KB figure, use the image compressor instead.
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