HEIC to ICO Converter: Free, Private, No Upload

Convert HEIC files to ICO in your browser. Lossless output, batch up to 20 files at once, no upload, no account, no watermark. Your files never leave your device.

HEIC to ICO
Batch up to 20 files
No upload, no account
Metadata stripped

1Add up to 20 images
2Pick from 18 formats
3Download or copy the code

Processed on your device. Your images are never uploaded, and metadata is stripped. How we keep it private

How do I convert HEIC to ICO for free?

Drop your HEIC files into the tool above, choose ICO as output, and download the result. Everything runs in your browser, so nothing is uploaded and there is no limit or watermark. It works on Windows, Mac, Linux, ChromeOS, iOS and Android — anywhere you have a modern browser.

Price: Free, no credits and no daily cap
Account required: No
File uploaded to server: No, processed locally in your browser
Batch limit: Up to 20 files at once
Input format: HEIC
Output format: ICO
Best for: ICO workflows, lossless quality, editing, printing
Works on: Chrome, Edge, Firefox, Safari, iOS and Android browsers
Privacy: No upload, no tracking, metadata stripped
Output quality: Lossless, exact pixels

How to convert HEIC to ICO

1
Drop your HEIC files
Drag up to 20 HEIC files onto the page or click to choose them. Everything runs in your browser.
2
ICO is preselected
Output is already set to ICO. Adjust quality, resize or batch if you want.
3
Download
Save each ICO, or download all of them together as a ZIP.

HEIC to ICO: what changes and when it makes sense

HEIC is a High Efficiency Image Container (HEIF using HEVC compression). It is best known for photos at roughly half the size of JPG, with 10-bit colour and depth data on iPhones. The main drawbacks are patchy support across web tools, editors and upload forms because of HEVC licensing.

ICO is an Windows icon format. It is best known for packing several sizes (16, 32, 48, 256 pixels) into a single file. The main drawbacks are a maximum size of 256 by 256 pixels and little use outside icons.

HEIC vs ICO at a glance

Property	HEIC	ICO
Type	Container format	Container format
Compression	Lossy HEVC compression, typically roughly half the size of JPG at similar quality	A container holding one or more bitmaps, each stored as BMP or PNG data
Transparency	Full alpha channel with soft edges	Full alpha channel with soft edges
Animation	No	No
Colour depth	8 to 16 bits per channel, with wide-gamut Display P3 colour on iPhones	Up to 32-bit colour with an 8-bit alpha channel
Support	Native on Apple devices and recent Windows and Android, but browsers other than Safari cannot display it	Supported by Windows and by browsers as a favicon, but most image viewers and editors do not open it directly
History	HEIF was defined by MPEG in 2015. Apple adopted HEIC (HEIF with HEVC) as the default iPhone photo format in iOS 11 (2017). The move roughly halved storage usage compared to JPG.	Introduced by Microsoft with Windows 1.0 in 1985. The modern 32-bit alpha version became standard with Windows XP (2001). Windows Vista (2007) added PNG compression inside ICO for icons larger than 48x48.

What actually changes in this conversion

Moving from a lossy format to a lossless one stops any further quality loss but cannot restore detail already discarded.
Transparency is preserved, including soft edges.
Browser-based conversion works in 8-bit sRGB. Wide-gamut, 10-bit and 16-bit data are reduced. For colour-critical work, keep the original.
ICO holds images up to 256 by 256 pixels. Larger sources are scaled down.
EXIF, GPS and camera data are stripped on every conversion. That is good for privacy, but you lose capture dates.

About HEIC: history and technical details

HEIF was defined by MPEG in 2015. Apple adopted HEIC (HEIF with HEVC) as the default iPhone photo format in iOS 11 (2017). The move roughly halved storage usage compared to JPG.

Technical: HEIF container holds HEVC-encoded image data plus metadata, thumbnails, and auxiliary images. HEVC (H.265) compression is roughly 2x more efficient than JPG. iPhone HEIC files use 10-bit Display P3 colour space.

Real-world size: An iPhone HEIC file is typically 1.5-2.5 MB, compared to 3-5 MB for the same photo as JPG. Windows 10 requires the HEIF Image Extensions from Microsoft Store to open it. Windows 11 has built-in support.

Popular tools: iOS Camera, macOS Preview, Adobe Photoshop 2021+, Adobe Lightroom 2018+, Windows 11 Photos, ImageMagick.

Alternatives: JPG (universal), PNG (lossless), WebP (modern web), AVIF (future web).

About ICO: what you get

Introduced by Microsoft with Windows 1.0 in 1985. The modern 32-bit alpha version became standard with Windows XP (2001). Windows Vista (2007) added PNG compression inside ICO for icons larger than 48x48.

Technical: Container holds 1-65535 images. Each entry has a 16-byte directory: width, height, colour count, planes, bit count, data size, data offset. Images are BMP (DIB) or PNG. Max dimension 256x256. Typical Windows icons use 16, 32, 48, 64, 128, 256.

Real-world size: A 6-size favicon.ico is typically 15-40 KB. A single 256x256 PNG favicon is 8-15 KB. Modern best practice uses separate files for 16, 32, 180 (Apple), 192, 512 (PWA).

Popular tools: IcoFX, GIMP, Adobe Photoshop (with plugin), ImageMagick, Favicon Generator, RealFaviconGenerator.

Alternatives: PNG (single size, widely accepted), SVG (sharp at any size), favicon.ico (still needed for legacy).

Browser and software compatibility

HEIC: Native on Apple devices and recent Windows and Android, but browsers other than Safari cannot display it. ICO: Supported by Windows and by browsers as a favicon, but most image viewers and editors do not open it directly.

ICO is meant for favicons and Windows icons. It is not a general-purpose image format.

Why people move away from HEIC

Most websites, forms and older Windows or Android devices cannot open HEIC.
Browsers other than Safari cannot display HEIC, so it cannot be used on web pages.
Email and messaging apps sometimes convert HEIC unpredictably, or refuse it.

Why people choose ICO

Browsers and Windows still look for favicon.ico at the root of a site by default.
One ICO file can carry several sizes, so tab icons, bookmarks and shortcuts all look sharp.
Windows shortcuts and application icons expect ICO.

Common mistakes with HEIC

Trying to upload HEIC to forms that only accept JPG
Expecting Windows 10 to open HEIC without the extension
Losing location data — HEIC to JPG strips GPS

Best practices for keeping quality

iPhone HEIC files use the Display P3 colour space. A browser conversion maps colour to sRGB, which can slightly mute very saturated colours.
Live Photo motion and depth data are not carried over. You get the still image only.
Start from a square image of at least 256 by 256 pixels and keep the design simple, since it will often be shown at 16 by 16.
Keep a PNG or SVG copy. Modern browsers accept link rel="icon" pointing at PNG or SVG.
Resize before converting if the image will be shown small. A 4000 pixel photo displayed at 800 pixels wastes bytes in any format.
Check the result at 100 percent zoom, especially around text, edges and gradients, before you replace any originals.
Keep your original files. Conversions to a lossy format cannot be undone.
When you convert a set of images, use the same quality setting for the whole batch. The converter handles up to 20 files at once.

HEIC to ICO questions

Quick answers about privacy, quality, supported formats, file limits and how ICO works.

Why convert HEIC to ICO?

ICO is lossless. It keeps every pixel exactly. It is the safe choice when you plan to edit, print or need exact pixel data.

Will converting HEIC to ICO lose quality?

No. ICO is lossless, so nothing is thrown away.

Does ICO keep transparency?

Yes. ICO supports full transparency, so transparent areas in your original are kept.

Are my files uploaded?

Never. Everything runs in your browser. Your files never leave your device. Open DevTools Network tab while processing — you will see no upload request.

Can I convert many files at once?

Yes, up to 20 files at once. Download them individually or all together as a ZIP.

Does the converter strip metadata?

Yes. Browsers do not pass EXIF data through a canvas, so GPS, camera model and dates are removed on every conversion. That is good for privacy.

Is it free?

Yes. No credits, no daily cap, no account, no watermark. The practical limit is your device memory.

What sizes should a favicon.ico have?

At minimum 16x16, 32x32, and 48x48. Modern best practice is to include 16, 32, 48, 64, 128, and 256 pixel versions in one ICO file. Browsers pick the size they need.

Your files never leave your device

No upload, no account, no tracking. Everything happens in your browser using the Canvas API and WebAssembly. You can confirm this in your browser's DevTools Network tab while the tool runs — no request carries your file. See why ToolDeck is different.