Image dimensions
Resize an image to the dimensions you need
Use pixels for a digital upload or centimetres with the required print density. Choose how to handle the proportions, then check the saved result. Your files never leave your device.
Drop an image here, or click to browse
JPG, PNG, GIF, WebP, AVIF, HEIC (browser support varies) — or paste / take a photo
What this page helps you do
Set a photo's width and height for a form, document or print layout, with an optional file-size target. The pixel preview makes the relationship between centimetres, DPI and output dimensions visible before export.
How to use the result
Use pixels for a pixel requirement. For a physical size, enter centimetres and the requested DPI. Keep Fit inside box enabled to preserve proportions, or crop to the required shape before requesting exact dimensions.
Before you rely on it
- Compare the actual output width and height with the requirement; fitting inside a box can leave one side shorter.
- Check for distortion and confirm any KB cap in the downloaded file.
Limit to keep in mind: Resizing does not crop the image or recover missing detail. Enlarging a small source can produce a larger but still blurry photo.
Keep pixels, print size and DPI distinct
Pixel dimensions control a digital image directly. A physical size also needs a print density: the 35 × 45 mm example becomes 413 × 531 pixels at 300 DPI. This example is not a universal passport rule.
Changing units converts the current measurements. Changing DPI alone cannot recover detail that the source never contained. If a form gives pixels, enter those values directly.
Fit within a box or use exact dimensions
Fit inside box preserves proportions and can leave one dimension shorter than the limit. The 400 × 600 portrait example remains 400 × 600 inside a 600 × 600 maximum box.
Exact width and height can stretch a picture whose proportions differ. This resizer does not crop. Prepare a permitted crop in the photo maker first when the framing needs to change.
Check both dimensions and file size
An optional KB target is applied after resizing. Fixed dimensions and a very small cap may not be achievable together, so inspect the finished size and any missed-target notice.
Reducing an image removes detail; enlarging cannot reconstruct missing detail. Output is capped at roughly 50 megapixels, and device memory can still limit a smaller job.
Related tools
Frequently asked questions
- Can I resize and compress in one workflow?
- Yes. Enter the required dimensions and a KB target. Check the final file size and any warning instead of assuming that both constraints passed.
- Does resizing cut anything off?
- No. It scales the whole image. Fit inside box preserves proportions, while exact dimensions can stretch the picture. Use the photo maker for a crop.
- Should an online form use a DPI value?
- Use pixel dimensions when the form states them. DPI is needed when converting a physical print size into pixels; it is not a substitute for a digital width and height.
- Why does an enlarged picture still look soft?
- More pixels do not recreate missing facial detail, writing or edges. Return to a higher-resolution original or take a clearer photograph where that is permitted.
- Where does processing happen?
- Resizing runs inside your browser. Input limits, decoding support and the memory available on the device still apply.