What this tool is for
Turn an image into a centered 512 × 512 PNG that can serve as a high-resolution favicon or app-icon source. It is a practical starting asset for modern website icon metadata.
How to use it
- Choose a simple image or logo with the main mark near the center.
- Select Process Image.
- GuavaPix applies a centered square crop and exports a 512 × 512 PNG.
- Download it, then add it to your site's icon metadata or create smaller variants as needed.
What happens to your image
The browser crops the largest centered square, resizes it to 512 × 512, and writes a PNG locally. It does not upload the source or create an ICO package.
Practical uses
- Create a favicon source from a square brand mark.
- Prepare a high-resolution icon for a web app manifest.
- Turn a mascot face into a browser-tab icon source.
- Standardize an existing logo to a square PNG canvas.
Favicon source versus favicon package
Modern browsers accept PNG favicons, often at 32 × 32 or larger, and web-app manifests can use 192 × 192 and 512 × 512 icons. This tool creates the 512 × 512 source only; your site setup determines which additional sizes and link tags are required.
Important limitations
- The output is PNG, not a multi-size .ico file.
- The crop is centered and cannot be repositioned.
- Detailed photos may become unclear at tiny favicon sizes.
- The tool does not install the icon on a website.
Frequently asked questions
Does this create an ICO file?
No. It creates a 512 × 512 PNG source that modern sites can use directly or resize into additional icon files.
What makes a good favicon?
Use a simple, high-contrast mark with little detail and enough empty space around its edges.
Can I use a rectangular logo?
Yes, but the tool keeps a centered square, so wide text can be cropped. A square brand mark works better.
Which HTML tag uses the favicon?
Sites commonly use a link element with rel=icon and the PNG path; frameworks may provide an icon metadata setting instead.