ICO – Windows Icon
ICO is the Windows icon format, and browsers also use it for favicons. A single .ico file can hold several sizes of the same icon, from 16x16 up to 256x256, so the right one is shown wherever it is needed.
More ICO conversionsDrop your ICO files here
or click to choose ICO files · up to 95MB each
How to convert ICO to PDF
- Choose your files. Click Select File or drag your ICO files into the upload box. You can add many at once.
- Pick the settings. PDF is already selected as the output format. The conversion starts as soon as a file is added.
- Download. Each file appears in the list when it is ready. Download them one by one, or all together with Download all.
PDF – Portable Document Format
PDF is the standard format for documents that must look the same on every device. It preserves layout, fonts and images, but is difficult to edit.
More PDF conversionsICO at a glance
| Feature | ICO |
|---|---|
| Full name | Windows Icon |
| Compression | PNG or BMP images inside |
| Transparency | Yes |
| Animation | No |
| Introduced | 1985 |
| Developed by | Microsoft |
| Best for | Favicons and Windows icons |
Converting ICO to PDF
- Layered files are flattened; for icons the largest size is used.
Frequently asked questions
How do I convert ICO to PDF?
Click Select File or drop your ICO file onto the upload box. The converted PDF appears in the list below with a download button. You can add many files at once and download them together as a ZIP.
Is it really free?
Yes. There is no sign-up and no watermark. To keep the service available for everyone there is a 95MB limit per file and a cap on how many files one connection can process in a short period.
Are my files stored?
Your upload is used only to make the converted file. Images are processed in memory; other files are written to a private temporary folder that is deleted as soon as the conversion finishes. Nothing is kept after the result has been sent back.
Will quality drop?
For images, a little, by design: the image is re-encoded at the Quality you choose (default 75%). Audio and video are re-encoded with high-quality settings; documents keep their text and layout as far as the target format allows. Converting never restores detail that is already missing from the original.
How this works: your file is uploaded over HTTPS and converted on this server with open-source engines (libvips for images, FFmpeg for audio and video, LibreOffice and Pandoc for documents, Calibre for ebooks, Ghostscript and Inkscape for PDF and vector files). Images are processed in memory; other files use a private temporary folder that is deleted as soon as the conversion finishes.