Resize an Image for Print

• Converts the print size you type into exact pixels at the DPI, 300 to begin with.
• Crops to the shape of that print size and scales the kept part to the pixel count.
• Writes the DPI into a JPEG or PNG, so print software reads the size you meant.

• Adds no detail: a small photo stretched to a large print reaches the pixels, not the sharpness.
• Writes no DPI into a WebP, so choose JPEG or PNG when the print size has to travel with the file; the panel says so when WebP is chosen.
• Leaves the original untouched — the print-ready copy is a new file you download.

1. Check the unit and the DPI. Inches and 300 DPI are filled in under Advanced options. Switch to centimetres or millimetres when your size is metric, and change the DPI only if whoever prints it asks for a different number.
2. Type the print size. Enter the width and height in that unit. The page turns them into whole pixels at the DPI, so there is no sum to do by hand.
3. Add the photo and place it in the frame. Drop a JPEG, PNG or WebP. The Target line under the photo shows the print size in pixels straight away, and a frame in the shape of the print appears; drag the photo until the part you want on paper sits inside it.
4. Press Fit image and check the result. The finished file is listed against every requirement — dimensions, format and resolution — with Meets or Fails beside each. Download image appears once they are met.

Paper is measured in inches or centimetres and a picture in pixels, and DPI is the exchange rate between them. At 300 DPI an inch of paper takes 300 pixels, so a print one inch wider needs that many more pixels across. A file with too few pixels for its size either prints smaller than intended or is stretched by the printer and comes out soft.

That is why this page asks for the size first and does the arithmetic itself. The width and height you type are multiplied by the DPI and rounded to whole pixels, and those pixels become the exact box the photo is fitted to.

Pixels alone do not tell software how big to print. A JPEG or a PNG can carry a resolution record, and print dialogs, layout programs and photo labs read it to decide the size on paper. When this page saves either of those formats it writes the DPI you used, so the file states the size you meant instead of leaving a program to assume 72.

Changing only that number, with the pixels left alone, is a different job: changing the DPI rewrites the record without touching the picture, which is right when the pixel count is already enough and wrong when it is not.

Inches come first because DPI is counted per inch, but the unit is a choice, not a limit. Switch Unit to centimetres or millimetres and type the size the way the instruction gives it; the conversion to pixels still happens at the DPI, with the inch converted to millimetres exactly.

For a passport or visa print, the size is not yours to choose: the passport photo tool carries the published size rules for the countries it lists, and the print sheet lays out as many copies as fit on one sheet of 4 × 6 in, 5 × 7 in, Letter (8.5 × 11 in) or A4 (210 × 297 mm) paper, at a DPI you set.

A large print from a small file is the case to watch. The page will still reach the pixel count — it enlarges the part inside the frame — but enlarging spreads the same detail over more pixels and cannot invent what the camera never recorded. When that is about to happen, the page names the photo’s size and the target size before it runs, so the choice is yours.

If the result looks soft, the fixes that add sharpness are a smaller print or a larger original. Lowering the DPI here, where the printer accepts a lower one, asks for fewer pixels and so less enlarging, but the paper still shows only the detail the photo had.

A photo may be up to 20 MB, and the converted size may not pass 8000 pixels on either side — at 300 DPI that is a print of up to 26.6 inches across. The whole output may also not pass 40 megapixels, about 21 inches square at 300 DPI, and that limit binds first on a square or near-square print, well before the per-side one does. The conversion, the crop, the scaling and the encode all run in this tab on your own device, so the photo is never sent anywhere, and a photo too big for what this device can spare is refused before the work starts.

• A WebP saved here carries no DPI. Choose JPEG or PNG when the print size has to travel with the file.
• One photo at a time — there is no batch mode on this page.