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Power-of-two texture resizer
Resize textures to power-of-two sizes such as 256, 512, 1024 or 2048 in one go. Round each side to the nearest, the next larger or the next smaller power of two, make them square if you like and save a ZIP. Free, in your browser.
How to resize textures to power-of-two sizes
- 1Drop your textures in (PNG, JPG, WebP), or click to choose
- 2Choose how to round, the largest side and the format
- 3Check the sizes and save, as a ZIP for several files
- Resized textures, as one file or as a ZIP.
What happens to your files
- Nothing is uploaded.Your pictures are read and resized by your browser, on your own device.
- A whole folder in one go.Many textures are resized together and saved as one ZIP.
- Old and new size shown.A table lists each file's size now and its power-of-two size.
What you can do
- Round each side to the nearest power of two, always up, or always down.
- Cap the largest side at 8192, 4096, 2048, 1024, 512 or 256 pixels. The default is 4096.
- Tick "Square" to make each texture a square of the larger side.
- Save in the same format, or as PNG, JPEG or WebP.
- Get a single file for one texture, or textures-power-of-two.zip for several.
Good to know
- Resizing stretches the picture to the new size. Rounding a side up or down changes the proportions unless both sides go the same way.
- The tool works on pictures, not on the textures inside a GLB. Use the glTF texture resizer for those.
- JPEG and WebP are saved at 90 percent quality, so a little detail can be lost.
Questions
Why do textures need power-of-two sizes?
Some engines and older GPUs handle sizes like 512 or 1024 best, especially for mipmaps and texture compression.
How do I resize many textures at once?
Drop them all in together. The tool saves them as one ZIP.
Does it keep the aspect ratio?
No. Each side is rounded on its own, so a 1000 × 600 picture can become 1024 × 512. Tick "Square" for equal sides.
Are my pictures uploaded?
No. They are resized in your browser and saved on your device.