HEIC to ICO Converter
Convert HEIC to ICO online for free. Fast, secure, and high-quality conversion with no sign-up or software required.
Maximum file size is 1GB
How it works
Three steps to your converted file
Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.
Upload your file
Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.
Choose an output format
Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.
Convert & download
Hit Convert and grab your download link moments later. Originals are erased when the job completes; results are cleared within about an hour.
What is a HEIC file?
HEIC (High Efficiency Image Container) is the file extension used for images stored in the High Efficiency Image File Format (HEIF) specifically when encoded with the High Efficiency Video Coding (HEVC/H.265) standard. Adopted by Apple in iOS 11 and macOS High Sierra, it encapsulates single images or image sequences using the ISO Base Media File Format (ISOBMFF). It offers superior compression ratios-typically 50% smaller than equivalent JPEGs-while supporting 16-bit color depth, transparency (alpha channels), and non-destructive editing instructions.
How to open a HEIC file
Native support is available on macOS (High Sierra and later), iOS 11+, and Windows 10/11 (provided the HEIF Image Extensions and HEVC Video Extensions are installed from the Microsoft Store). Android 9 (Pie) and later also support the format natively. For older systems or non-compatible software, users often require conversion tools like iMazing HEIC Converter or must use viewers like VLC Media Player and GIMP, which have integrated HEIC decoding libraries.
HEIC Technical Info
- Full Name
- High Efficiency Image Container
- Developed By
- MPEG (Moving Picture Experts Group)
- Initial Release
- 2015
- MIME Type
- image/heic
What is an ICO file?
The ICO format is an image container specifically designed for Microsoft Windows to store icons for executable files, folders, and applications. Introduced with Windows 1.0, it can encapsulate multiple raster images of varying dimensions and color depths (specifically BMP or PNG frames) within a single file to support dynamic scaling across different display resolutions. The structure comprises an ICONDIR header referencing one or more ICONDIRENTRY directory entries, allowing the operating system to select the appropriate 16x16, 32x32, or 48x48 pixel resource based on the current UI scaling settings.
How to open an ICO file
ICO files are natively supported by the Microsoft Windows operating system, which automatically renders them in the File Explorer and taskbar. On macOS, Apple Preview handles the format natively. For editing or detailed inspection of the contained bitmap layers, raster graphics editors such as GIMP, Adobe Photoshop (via plugin), or Paint.NET are required. Web browsers also natively render ICO files when they are designated as favicons.
ICO Technical Info
- Full Name
- Microsoft Icon File
- Developed By
- Microsoft
- Initial Release
- 1985
- MIME Type
- image/vnd.microsoft.icon
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Why RunConvert
The fastest way to convert any file
Purpose-built for speed, privacy, and breadth of format support.
Convert HEIC to ICO in seconds
Every HEIC to ICO conversion runs on our servers, so your device stays fast and the output quality stays intact.
Fast, cloud-powered
No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.
Secure & private
Encrypted in transit and never shared with anyone. Uploads are erased the moment your job completes, and results shortly after.
Free - no account needed
Convert without creating an account - no credit card, no trial clock. Sign in only if you want history and higher daily limits.
Developer API
Convert HEIC to ICO via API
Automate HEIC to ICO conversions in three steps: create a job, upload your file, then poll for the result.
# 1. Create job
curl -X POST https://api.runconvert.com/v3/jobs \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"tag": "heic-to-ico",
"tasks": {
"upload-file": {
"operation": "import/upload"
},
"convert": {
"operation": "convert",
"input": "upload-file",
"output_format": "ico"
},
"export-result": {
"operation": "export/url",
"input": "convert"
}
}
}'
# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.heic
# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$JOB_ID?include=tasks \
-H "Authorization: Bearer YOUR_API_KEY"Replace YOUR_API_KEY with your RunConvert API key. Get your free API key at runconvert.com/api.