Resize Image to 256x256
Resize images to exactly 256x256 as a favicon source, UI icon, or app icon size. Check legibility and keep a larger master.
- No file limits
- No registration
- Free forever
- Images never leave your browser
Drop images here
or paste from clipboard (Ctrl/⌘ + V)
Supported formats: JPG, PNG, WebP, AVIF, SVG
Your image is smaller than the target, so the result will be upscaled and soft. Use a higher resolution photo for a sharp output.
This page outputs exactly the target size. If your image is smaller, the file is enlarged to reach it and looks softer. Enlarging cannot recover detail that was never captured.
Processing…
Your images never leave your browser
All processing happens locally on your device. Nothing is uploaded to a server, stored, or tracked.
256 by 256 is the practical upper limit for a favicon source. Browser tabs request 16, 32, and 48 pixel icons, so a 256 pixel master leaves room to scale down cleanly, and it is still the largest square most icon systems ask you to supply directly.
How it works
Why 256 is the usual favicon source size
Browsers request tab icons at 16, 32, and 48 pixels, and some sites also reference larger sizes for pinned tabs and home screen shortcuts. A 256 pixel master has room to reduce to all of them without touching fractional pixels, and it is large enough to survive the reduction. Starting smaller forces the generator to invent detail it does not have.
| Size | Where it is used | From a 256 source |
|---|---|---|
| 16 × 16 | Classic browser tab | Clean 16 to 1 reduction |
| 32 × 32 | Modern browser tab, bookmarks | Clean 8 to 1 reduction |
| 48 × 48 | Windows shortcut icon | Clean reduction, not an exact divisor |
| 180 × 180 | Apple touch icon | Requires its own export |
| 192 × 192 | Android home screen | Requires its own export |
| 256 × 256 | Source and Windows tile | The size itself |
What survives at 256 by 256
This size is a comfortable middle ground. Text becomes small but a short word can still read, a face keeps recognisable detail, and shapes of 3 pixels or thicker stay defined. That is why 256 is a good source even when the final icons are much smaller, and why going straight from a 1,024 master gives better results than going straight from 128.
- Keep shapes 3 pixels or thicker at 256 so they survive reduction to 16.
- Test the result at actual size, not zoomed. A 256 image previewed large looks blurry and is perfectly sharp in use.
- Keep the largest master you have, so a future 512 or 1,024 export is a reduction rather than an enlargement.
Crop, pad, or stretch
For an icon, crop to fill with the mark centered is the usual choice, since padding produces bars that look unfinished unless the colour matches exactly. Fit with a matching background colour works when the mark must not be cut. Stretch distorts the proportions and is rarely what you want for a logo.
NoteIf the icon needs a transparent background, export PNG. Fit mode pads with a solid colour, not an empty channel.
Batch resize images to 256x256
Resize a group of images to 256x256 for icons in one pass. Free, private, and everything runs locally.
Frequently asked questions
What is 256x256 used for?
Favicon source files, UI icons, game textures, and app icon sizes. It is a common intermediate size when building a multi size icon set.
What favicon size should I use as a source?
256 by 256 is a solid choice because it reduces cleanly to 16, 32, and 48 pixels, which is what browsers actually request. To do all of that in one step, use the favicon generator.
Is 256x256 better than 128x128 for a favicon?
Yes, as a source. 128 works but leaves less room to scale down smoothly, and 256 gives the generator more to work with before it reaches 16 pixels. Both are fine, and 256 is the safer starting point.
Will my image be exactly 256x256?
Yes, as long as the source is at least that size on both edges. A smaller image is enlarged to reach the target and looks softer, with a warning shown. Enlarging does not recover detail.
Can I batch resize images to 256x256?
Yes. Add a folder, resize every file to 256 by 256, and download them together as a ZIP. Everything runs on your device.