What DPI should I choose for printing?

300 DPI for photos and documents viewed up close, 150–200 DPI for posters viewed from a distance. Images that are only shown on screen don't need a particular DPI.

How do I resize a photo to 3.5 × 4.5 cm?

Pick the 3.5 × 4.5 cm preset (or type it in), keep 300 DPI and download. You get a 413 × 531 pixel image that prints at exactly that size.

What if my image has a different aspect ratio?

Keep the ratio locked to preserve the original proportions, or unlock it and choose Crop to fill the size, Fit to add white borders, or Stretch.

Is the Resize Image in CM free to use?

Yes. Resize Image in CM is completely free with no sign-up, no watermarks and no usage limits.

Are my files uploaded to a server?

No. Resize Image in CM runs entirely in your browser — your files and data never leave your device.

Does it work on mobile and offline?

Yes. It works in any modern browser on desktop or mobile, and the toolkit is a PWA that keeps working offline after your first visit.

Resize Image in CM

Resize an image to exact centimetres, millimetres or inches at 300 DPI (or any DPI) for printing, forms and photo prints. The DPI is saved in the file. Free, no upload.

How it works

1
Add your image
Drop a photo or scan. It's processed in your browser — nothing is uploaded.
2
Enter the print size
Type the width and height in cm, mm or inches, or choose a preset like 3.5 × 4.5 cm or A4.
3
Choose the DPI
300 DPI is standard for photo prints. The exact pixel size it produces is shown as you type.
4
Download
Get a JPG or PNG with the pixel size and DPI set, ready to print at exactly that size.

Common uses

Resize a photo to 3.5 × 4.5 cm for a passport, visa or ID application.
Prepare an image to print at exactly A4, A5 or 10 × 15 cm.
Meet a form rule like '5 × 5 cm at 300 DPI' without a photo editor.

About the Resize Image in CM

Resize an image to exact centimetres, millimetres or inches at 300 DPI (or any DPI) for printing, forms and photo prints. The DPI is saved in the file. Free, no upload.

Printers and application forms think in centimetres, but image files only store pixels plus a DPI (dots per inch) tag that says how big those pixels should print. This tool does the conversion — pixels = size in inches × DPI — resamples the image with high-quality Lanczos filtering, and writes the DPI into the JPG or PNG so Word, Photoshop and print shops read the right physical size.

Resize Image in CM is part of a free, privacy-first toolkit. Everything is processed locally on a Canvas with high-quality pica resampling — there are no uploads, no quality loss from a server round-trip, and no limits.

Because resize image in cm works without any sign-up or installation, you can use it as often as you like and it's always available — on desktop or mobile, and even offline.

Explore more image tools, or try Change Image DPI · Resize Image in Inches.

One-click presets: Resize Image in Inches.