Direct answer
Image to ICO conversion rasterizes an SVG or bitmap logo, trims transparent or near-white margins, pads the result to a square, and packages selected sizes into a Windows ICO container together with matching PNG files.
How to use this tool
Upload one image
Drop a single SVG, PNG, JPG, or WebP logo. SVG markup is sanitized in the browser before rendering.
Choose ICO sizes and trim tightness
Keep the default 16, 32, and 48 pixel layers or add 64, 128, and 256. Use the inset slider if automatic margin removal still leaves extra padding.
Download the ZIP
Export a ZIP named from your file that contains a multi-size favicon ICO and one PNG for each selected size.
How Browser-Based Image to ICO Conversion Works
Favicons and desktop icons need square bitmaps at several resolutions. This tool decodes the source in local Canvas memory, removes empty margins, pads to a square, scales each requested size, and writes a Microsoft ICONDIR ICO plus PNG siblings into one ZIP.
- Client-Side Processing: Rasterization, trimming, and ICO packaging never leave the device.
- SVG Sanitization: Script tags, event handlers, and remote resources are stripped before an SVG is drawn.
- Matched PNG Export: Each selected ICO layer is also saved as a PNG with the same pixel size.
Practical examples
Turn a logo into a favicon pack
Input: File: logo.png (brand mark with extra transparent padding)
Output: Exported: logo-favicon.zip containing logo-favicon.ico plus logo-16.png, logo-32.png, and logo-48.png
Produces a complete favicon set for browser tabs and a matching PNG for each selected size.
Limitations
- Only one image is processed at a time; replace the current file to convert another logo.
- Animated SVG and animated WebP are rejected because a static ICO cannot keep multi-frame animation.
- Very light logos on near-white backgrounds may be trimmed too tightly; reduce the inset or add contrast before export.
Frequently asked questions
Which files can I convert to ICO?
SVG, PNG, JPG/JPEG, and WebP. SVG files are sanitized first so scripts and remote network references cannot run.
Does this tool upload my logo?
No. Decoding, margin trimming, Canvas scaling, ICO packaging, and ZIP creation all happen in your browser.
Authoritative References & Standards
- W3C Scalable Vector Graphics (SVG) 2 Specification ↗ — Official W3C recommendation governing SVG document trees, coordinates, and rasterization rendering.