When this tool is useful
Preparing common browser-tab, shortcut, install and launcher assets from a simple square mark with safe padding and transparent edges.
How local processing works
The browser validates and decodes one source, fits it consistently onto transparent square canvases for the documented icon sizes, encodes each PNG, packages selected small sizes into ICO directory entries, and includes a manifest snippet and file inventory in the ZIP.
How to use it
- Prepare the source and limits: Keep an unchanged source and review the accepted format, dimensions, frame or page budget, and output choices. Preparing common browser-tab, shortcut, install and launcher assets from a simple square mark with safe padding and transparent edges.
- Process locally: Run the documented bounded operation in this browser and stop when the decoder reports an unsupported structure. The browser validates and decodes one source, fits it consistently onto transparent square canvases for the documented icon sizes, encodes each PNG, packages selected small sizes into ICO directory entries, and includes a manifest snippet and file inventory in the ZIP.
- Download and verify: Inspect every PNG at native size on light and dark backgrounds, confirm transparent padding and maskable safe zones, open the ICO entries, validate the manifest paths in the real site, clear platform icon caches, and test install and launch on target devices.
Important limitations
The package supplies dimensions, not platform approval or a complete site manifest. Scaling one master cannot restore detail at tiny sizes, transparent pixels can be flattened by some launchers, maskable PWA icons need deliberate safe-zone artwork, ICO transparency differs between PNG alpha and legacy masks, and operating systems may cache old icons.
Verify the downloaded result
Inspect every PNG at native size on light and dark backgrounds, confirm transparent padding and maskable safe zones, open the ICO entries, validate the manifest paths in the real site, clear platform icon caches, and test install and launch on target devices.
Private by design
Your files stay in this browser. The tool does not upload the source or output to our servers.
Questions and answers
When is this workflow useful?
Preparing common browser-tab, shortcut, install and launcher assets from a simple square mark with safe padding and transparent edges.
What does local processing do?
The browser validates and decodes one source, fits it consistently onto transparent square canvases for the documented icon sizes, encodes each PNG, packages selected small sizes into ICO directory entries, and includes a manifest snippet and file inventory in the ZIP.
Which format limits matter?
The package supplies dimensions, not platform approval or a complete site manifest. Scaling one master cannot restore detail at tiny sizes, transparent pixels can be flattened by some launchers, maskable PWA icons need deliberate safe-zone artwork, ICO transparency differs between PNG alpha and legacy masks, and operating systems may cache old icons.
How should I verify the download?
Inspect every PNG at native size on light and dark backgrounds, confirm transparent padding and maskable safe zones, open the ICO entries, validate the manifest paths in the real site, clear platform icon caches, and test install and launch on target devices.