How to resize an image without losing quality
Shrinking an image is essentially free in quality terms. Enlarging is not, because the missing detail has to be invented. Knowing which direction you are going tells you what to expect.
JPG, PNG or WebP. Everything is processed on your device.
Up to 50 MB per file. Files are processed in your browser.
Full options and FAQs on the Image Resizer page.
Downscaling versus upscaling
Reducing dimensions averages existing pixels together, so the result stays sharp. Increasing dimensions has to guess at pixels that were never captured, which produces softness or blockiness. Always start from the largest original you have.
Aspect ratio
Keep the ratio locked and the picture stays true. Force both dimensions to values that do not match the original ratio and faces stretch. When a platform demands an exact square, resize on the long edge and crop the excess instead of squashing.
Dimensions people usually need
- Passport-style photograph: commonly 600 x 600 pixels — always check the specific authority's rule.
- Profile picture: 400 x 400 pixels is enough almost everywhere.
- Full-width web image: 1600 pixels wide.
- Print at 300 DPI: multiply the printed size in inches by 300.
Step by step
- 1Start from the highest-resolution copy you have.
- 2Load it into the resizer and keep the aspect ratio locked.
- 3Enter the target width; the height follows automatically.
- 4Resize and inspect the result at 100%.
- 5Compress afterwards if the file still needs to be smaller.
Frequently asked questions
- Can I make a small image bigger and keep it sharp?
- Not really. Standard resizing cannot recover detail that was never captured — modest enlargements of 20-30% pass unnoticed, but doubling a small image will look soft.
- Does resizing change the format?
- No, the format is preserved. Use the converter if you also need to change it.