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PDFHive

Resize image

Change a photo or image to the exact size you need: in pixels for websites and online forms, in centimetres or millimetres for printing, or by percent. See the framing before you save, and add a KB limit if a form asks for one.

Your files are processed in your browser and never leave your device.

How to use Resize image

  1. Click "Select image" and choose a JPG, PNG, WebP or iPhone HEIC image.
  2. Choose a unit (pixels, cm, mm or percent) and type the new width and height. With "Keep proportions" ticked, the other side fills in by itself.
  3. If the new shape is different, choose Crop to fill, Add white border or Stretch, and use the slider to move the picture into place.
  4. If your form has a size limit, tick "Limit the file size" and type it in KB, then click "Resize image".
  5. Check the result and download it.

How to resize an image to exact pixels

Choose Pixels, untick "Keep proportions", and type both numbers, for example 600 × 600 for a square profile picture. If your image has a different shape, Crop to fill trims the edges so the picture fills the whole size, and the slider decides which part stays. Add white border keeps the whole picture and fills the gaps with white instead.

The preview shows exactly what you'll get, and the result is exactly the size you asked for, down to the last pixel.

How to resize a photo in cm or mm

Screens work in pixels, so a size in centimetres needs a print resolution to turn it into pixels. PDFHive uses 300 DPI (dots per inch), the usual standard for printed photos: 3.5 cm becomes 413 pixels. Choose 200 DPI for smaller files or 600 DPI for very sharp prints.

The resolution is also written into the JPG or PNG file, so when you print it at 100%, it comes out at the size you chose.

How to resize an image for an online form

Application forms often ask for a photo of a given size in pixels and under a given size in KB, such as 200 × 230 pixels and under 50 KB. Type the pixel size, tick "Limit the file size", and enter the KB limit. The image is saved as a JPG at the best quality that fits, without changing the pixel size you asked for.

What if the resized image won't fit the form?

Forms usually check the pixel size, the file size in KB, or both. If yours is rejected, check these.

  1. The image looks soft: it was made larger than the original. Start from a bigger original, or choose a smaller size.
  2. Still over the KB limit at that pixel size: choose a smaller pixel size, or check whether the form accepts a larger file.
  3. Part of the face is cut off with "Crop to fill": move the picture with the slider, or choose "Add white border" to keep the whole picture.
  4. A size in cm or mm prints at the wrong size: print at 100% ("actual size"), not "fit to page".

Frequently asked questions

Is my image uploaded anywhere?

No. The image is resized inside your web browser, on your own computer or phone. It never leaves your device, so personal photos and documents stay private.

Is Resize image free?

Yes. It is free, with no sign-up, no watermark and no limit on how many images you resize.

Will resizing reduce the quality of my image?

Making an image smaller keeps it sharp: PDFHive shrinks big photos in gentle steps to avoid jagged edges. Making it larger than the original can't add detail, so it may look soft; the tool warns you when that happens. JPG and WebP are saved at high quality, and PNG is saved without any quality loss.

What is the difference between Crop to fill, Add white border and Stretch?

They only matter when the new shape is different from your image. Crop to fill fills the whole size and trims what doesn't fit, and you choose which part stays. Add white border keeps the whole image and adds white bars. Stretch squeezes the image to fit, which makes faces and text look distorted.

Which file format will I get?

The same as your original: a JPG stays a JPG, a PNG stays a PNG (with any transparency), and a WebP stays a WebP. An iPhone HEIC photo is saved as a JPG. With a KB limit, the result is always a JPG, because JPG gives the smallest files for photos. Safari can't save WebP, so there a WebP becomes a PNG.

Can I resize a photo on my phone?

Yes. It works in Safari and Chrome on iPhone and Android. Choose a photo from your gallery, resize it, and the new file is saved to your phone, ready to upload.

What DPI should I use?

For printed photos, 300 DPI is the usual choice and is selected for you. Use 200 DPI if a form gives a size in cm and a small KB limit, or 600 DPI for very fine prints. DPI only matters for sizes in cm or mm; for pixels, the number of pixels is all that counts.

Is there a size limit?

Images are made in your browser's memory, so the new size can be up to 16,000 pixels on each side and 50 megapixels in total. Very large photos may be slow on older phones. To make a file smaller in KB without changing its size much, use Compress image instead.

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