How to use Resize Image Online - Pixels, CM, MM & Inches
- 1Upload your photo or signature.
- 2Type the width and height in pixels, or pick a preset.
- 3Optionally crop or set a maximum file size, then download.
About Resize Image Online
This image resizer changes your picture to any dimensions you type. Enter a width and height, press Resize, and download. You can work in pixels, centimeters, millimeters, or inches. Aspect ratio lock keeps faces from stretching. Up to 10 images resize in one batch, free.
Forms rarely speak the same unit. Web uploads want pixels. Indian government forms often quote centimeters, like 3.5 x 4.5 cm. Print shops think in inches and DPI. This tool takes all of them directly, no conversion math needed. Set the DPI field when a form names one, usually 200 or 300. The saved file carries that DPI so validators accept it.
Keep the aspect ratio lock on whenever both sizes are flexible. The tool then fits your photo without distortion. Turn it off only when a form demands exact width and height. If the forced shape crops badly, crop first with the built-in crop button. Small tip: enlarging a tiny image cannot add detail. Start from the biggest original you have.
Need the file smaller in KB rather than dimensions? Use reduce image size in KB. Common exact sizes have preset pages, like 3.5 x 4.5 cm and 600 x 600 pixels.
We see 3.5 x 4.5 cm asked for more than any other size. Type any size directly, or use the preset pages linked above.
DPI confuses more people than any other setting here. On screens, DPI changes nothing: only pixels count. For printing, DPI tells the printer how densely to place those pixels. A form that demands 300 DPI wants print-quality sharpness. Set the DPI field only when your form names a number. Otherwise leave it alone and think in pixels or centimeters.