Resizing a PNG with transparency
PNG is lossless and can hold transparent areas, so it is the usual format for logos, icons, interface graphics and screenshots. This page keeps the output as PNG and keeps the transparent pixels, including soft edges. Nothing needs to be filled with a colour unless you choose padding.
Icons and logos
- Resize from the biggest version you have. A 1,024 pixel logo can become a 256, 128 or 64 pixel icon, but a 64 pixel icon cannot become a sharp 512 pixel logo.
- For tiny sizes, check the result at 100%. Thin lines can become blurry at 16 or 32 pixels and may need a hand-made small version.
- Use a square size for app and favicon images. For icon files, see the PNG to ICO converter.
Screenshots
Text and lines in screenshots look best when they are scaled by whole fractions, such as 50%. Odd sizes make the text soft. If you only want a smaller file, compress the PNG by reducing colours instead of pixels.
File size of PNGs
A PNG is not tuned with a quality slider. File size follows the pixel count and the amount of detail. A photo saved as PNG is several times larger than the same photo as JPG or WebP. If the picture has no transparency, switch the output format to JPG or WebP to get a much smaller file. WebP keeps transparency in a smaller file: use the WebP resizer.
Print size
Choose cm, mm or inches and a DPI, and the tool does the pixel maths. The DPI is also stored in the PNG, which some print programs read.
Other formats: JPG, WebP, HEIC. Shrink to a limit: 100 KB, 200 KB, 500 KB.