Generate professional website favicons with customizable dimensions directly from your PNG images in seconds.
PNG (Portable Network Graphics) is a lossless raster format released in the mid-1990s as a royalty-free successor to GIF, after a licensing dispute over the LZW compression algorithm. It compresses images with the DEFLATE algorithm, the same method used by ZIP archives, so every pixel is preserved exactly with no generation loss on repeated saves. PNG also supports a full 8-bit alpha channel for smooth, partial transparency, unlike GIF's binary on/off transparency. These properties make it the standard choice for screenshots, logos, icons, and any graphic with sharp edges, flat colors, or text that needs to stay perfectly crisp.
ICO is the native icon file format of Microsoft Windows, dating back to Windows 1.0 in 1985. What makes ICO distinctive is that a single file is actually a small container holding several versions of the same image at different resolutions and color depths — commonly 16×16, 32×32, 48×48, and 256×256 — so Windows, and browsers for favicons, can automatically pick the size that best fits the context. Because of this multi-size structure, converting a regular JPG, PNG, WEBP, or SVG image into ICO isn't a simple format swap: the source image needs to be resized and packed into that same multi-resolution container, which is exactly what a dedicated ICO converter automates.
Websites require precise favicon dimensions depending on where they are displayed—from browser tabs (16x16 or 32x32) to app shortcuts and high-density screens. Our tool runs 100% in your browser, ensuring total privacy while safeguarding image transparency and quality.
The standard **32x32 pixels** size works universally across almost all modern web browsers for standard tabs.
If your source image is rectangular (e.g., a wide logo), this option adds transparent padding around it to prevent distortion inside the square ICO file.
No, all conversion logic is executed locally within your browser using JavaScript for complete privacy.
Transform formats with transparency.
Adjust dimensions for optimal display.
Reduce graphic file sizes securely.