Image resizer
Set the exact width and height, in pixels, centimetres or percent. Nothing is uploaded.
JPG, PNG, WebP, HEIC or AVIF, up to 20 MB. You can choose up to 10 images at once.
Your image stays on your device.
How to use it
Choose one or more images.
Enter the new size in pixels, percent, or cm or inches.
Download the resized image.
What you can resize to
An exact size in pixels
Type the width and height a form or website asks for. With Keep proportions on, the other side follows, so the picture is never stretched.
A print size in cm or inches
Enter the size in centimetres or inches and a DPI, such as 300. ChobiKit works out the pixels and saves the DPI in the file, so it prints at that size.
A percentage
Halve a large phone photo with 50%, or double a small image with 200%.
Up to 10 images at once
Choose several images and resize them in one go. Each keeps its own shape, and they download together as one ZIP file.
Pixels, centimetres and DPI
A digital image has no size in centimetres, only pixels. The DPI (dots per inch) says how many of those pixels go into each inch of paper when it is printed.
To turn a print size into pixels, change the centimetres to inches (divide by 2.54), then multiply by the DPI. ChobiKit does this for you:
- 3.5 cm at 300 DPI is 413 pixels.
- 2 inches at 300 DPI is 600 pixels.
- 10 cm at 150 DPI is 591 pixels.
If a form gives a size in cm but no DPI, 300 is the usual choice for photos.
When to resize an image
- An application form or portal asks for an exact width and height.
- A website, shop or blog loads faster with smaller images.
- An email or chat app refuses a picture that is too large.
- A print shop needs a photo at a set size in cm or inches.
- A phone photo is thousands of pixels wide, far more than a screen shows.
Smaller, larger and sharpness
Making an image smaller keeps it sharp: each group of pixels is blended into one with a high-quality filter. Making it larger can't add detail the camera never caught, so the more you enlarge, the softer it looks; the tool tells you when the new size is larger than the original.
Resizing changes the file size in KB too. If a form also sets a limit in KB, resize first, then compress the result to KB.
Frequently asked questions
How do I resize an image?
Choose your image, type the new width or height, and press Resize. With Keep proportions on, the other side changes to match, so the picture is never stretched.
Can I resize in centimetres or inches?
Yes. Choose Print size, enter the size in cm or inches and a DPI, and the tool works out the pixels. The DPI is saved in the file, so the photo prints at that size.
What DPI should I use?
300 DPI is the usual choice for printed photos. If a form gives a size in cm together with a DPI, use exactly those numbers.
Can I resize by percent?
Yes. 50% halves the width and height, and 200% doubles them.
Will resizing make my photo blurry?
Making an image smaller keeps it sharp. Making it larger than the original can't add detail, so it may look softer; the tool warns you when that happens.
Can I resize several images at once?
Yes, up to 10 at a time. Each image keeps its own proportions, and you download them together as a ZIP file.
Does resizing change the file size in KB?
Usually, yes: fewer pixels make a smaller file. If you need a file under a set number of KB, compress it to KB after resizing.
Is my image uploaded?
No. Resizing happens in your browser, and your images are never sent to a server.