Resize Photo to 3.5 x 4.5 cm
Add your photo and the tool crops and resizes it to 3.5 x 4.5 cm (35 x 45 mm), which is 413 x 531 pixels at 300 DPI. Turn on the size limit if the form also asks for a file under 20, 50 or 100 KB.
Your exact pixel size is kept and the JPEG quality is lowered until the file is just under the limit (1 KB counted as 1,000 bytes, so it passes whichever way a website measures). PNG is saved as JPG when a limit is on, and transparency becomes white.
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Supports: JPG, PNG, WebP • Max 10MB per file • Up to 10 images
100% Private
Everything happens in your browser. Pictures are never uploaded to any server.
Pixels, cm, mm or inches
Type the size in the unit your form uses. The DPI is saved inside JPG and PNG files.
Batch Processing
Resize up to 10 pictures at once and download them all as a ZIP.
How to resize a photo to 3.5 x 4.5 cm
- Set the width and height above, in pixels, centimetres, millimetres or inches (the size for this page is already filled in).
- Choose how the picture should fit: crop to fill, pad with white, stretch or keep proportions.
- Optionally tick Keep the file under and choose a size such as 20, 50 or 100 KB.
- Drop your JPG, PNG or WebP picture into the box, press Resize and download the result. The file name ends with the new size in pixels.
3.5 x 4.5 cm is a common size for passport and ID photos, but rules differ between countries and forms, so always check the size, background and head position your application asks for. This tool only changes the size: it does not change the background. For portraits, set "Crop from" to Top so the head is not cut off.
Centimetres to pixels at 300 DPI
| Size | Pixels |
|---|---|
| 3.5 × 4.5 cm | 413 × 531 |
| 4 × 6 cm | 472 × 709 |
| 5 × 7 cm | 591 × 827 |
| 10 × 15 cm | 1181 × 1772 |
| 21 × 29.7 cm | 2480 × 3508 |
Related size pages
Frequently asked questions
What is 3.5 x 4.5 cm in pixels?
At 300 DPI it is 413 x 531 pixels, at 200 DPI 276 x 354 pixels, at 150 DPI 207 x 266 pixels and at 96 DPI 132 x 170 pixels. The tool shows the pixel size for the DPI you choose.
Is 3.5 x 4.5 cm the same as 35 x 45 mm?
Yes. One centimetre is ten millimetres, so 3.5 x 4.5 cm is 35 x 45 mm. In inches it is about 1.38 x 1.77.
How do I resize a photo to 3.5 x 4.5 cm and under 50 KB?
Add your photo, keep the size at 3.5 x 4.5 cm, tick "Keep the file under" and choose 50 KB. The tool keeps the exact pixel size and lowers the JPEG quality until the file is just under the limit.
Will my photo be cut off?
If your photo has a different shape, "Crop to fill" cuts off the edges so nothing is stretched. Use "Crop from: Top" for portraits, or choose "Pad with white" to keep the whole picture and add white borders instead.
How do I resize an image to an exact size?
Add your picture, choose the unit (pixels, cm, mm or inches), type the width and height, pick how the picture should fit (crop to fill, pad with white, stretch or keep proportions) and press Resize. Then download the result.
How do I keep a picture under 50 KB or 100 KB after resizing?
Tick "Keep the file under" and type the size. The tool keeps your exact pixel size and lowers the JPEG quality until the file is just under the limit. If even the lowest quality is too big, it shows the smallest size it reached, and you can use a smaller pixel size or a larger limit.
What is the difference between crop, pad, stretch and keep proportions?
Crop to fill scales the picture until it covers the exact size and cuts off what overflows. Pad with white scales it until it fits inside and fills the rest with white, so nothing is cut off. Stretch forces the exact size and can distort the picture. Keep proportions fits the picture inside your width and height, so one side may end up shorter than you typed.
Does it work with PNG and WebP?
Yes. You can add JPG, PNG and WebP pictures and save the result as JPG, PNG or WebP. With a file size limit, PNG is saved as JPG because PNG files cannot be made smaller by lowering the quality, and transparent areas become white.
Is my picture uploaded to a server?
No. Resizing runs in your browser on your own device, so the picture is never sent to our servers.