Resize Image in CM Online Free

Resize an image to exact centimeter dimensions in your browser. Set the width and height in cm, lock the aspect ratio so it does not stretch, and optimize the file size to an exact KB. Made for printing, photos, and forms. Downloads as JPG. No upload, no signup.

Upload Your Image

Drag and drop or click to select - JPG, PNG, WebP supported

Processing is 100% in-browser. Your image is never uploaded.

How to Resize an Image in Centimeters

1

Upload Your Image

Drag and drop or choose any image to resize.

2

Set the Size in CM

Type the exact width and height in centimeters. Turn on Optimize File Size to also set a target KB.

3

Download the Result

Click Download and get the image at the exact cm size you set.

Pixellize free online tools illustration showing browser, file, and gear icons

Centimeter Dimensions for Printing, Photos, and Frames

Frames, posters, photo prints, and book covers are usually specified in centimeters, not pixels. This resizer converts your image to the exact cm dimensions you need, so it prints at the physical size you set. Type the width and height in cm and download, no math required.

When a form or print shop caps the file size, turn on Optimize File Size and set the KB. The tool tunes the quality and, if needed, the dimensions, then matches your exact target. To double-check sharpness before you print, run the file through the DPI checker.

Why Use Our Image Resizer in CM

Exact Centimeter Sizing

Set the width and height in centimeters with 0.1 cm precision. The pixels are worked out at 200 DPI, so the image comes out at the real-world size you asked for. Good for photo prints, ID photos, frames, and forms that ask for cm.

Lock Aspect Ratio

Turn on Lock Aspect Ratio and the matching side updates as you type, so the image keeps its shape and never looks stretched. Leave it off to fill an exact cm box.

Resize to an Exact KB

Turn on Optimize File Size and enter a size in KB. The tool tunes the quality, shrinks the dimensions if needed, and matches your exact target. Handy for portals that cap uploads at 20 KB, 50 KB, or 100 KB.

Private, No Upload

Your image never leaves your device. Loading, resizing, and compression all run in your browser, with no upload, no account, and nothing stored. The resized JPG is created on your device.

Frequently Asked Questions

Common questions about resizing images in centimeters.

How are centimeters converted to pixels?
The conversion uses pixels = (centimeters / 2.54) times DPI. This tool uses 200 DPI, a common print resolution that balances quality and file size. So 3.5 cm at 200 DPI is about 276 pixels. The pixel output is set entirely by the cm values you enter.
Why does my image look stretched?
By default the tool fills the exact width and height you set, which can stretch the image. Turn on Lock Aspect Ratio to keep the original shape, or enter cm values that match the original proportions, and the image will not look stretched.
How do I resize an image to a specific size in KB?
Set the width and height in cm, then turn on Optimize File Size and enter a number in KB. The tool lowers the JPEG quality and, if the file is still too big, reduces the dimensions, then matches your exact target so the download is the size you asked for.
How do I resize an image to cm for printing?
Enter the print size in centimeters, for example 10 by 15 cm for a standard photo, and download. The tool sets the pixels at 200 DPI so the print matches the physical size. For a sharper result, start from a high-resolution photo rather than a small one.
Scroll to Top