Is this HEIC to ICO converter really free?

Yes. Up to 5 files at a time, no signup, no catch. The free tier adds a small watermark to image output — Pro ($9.99/mo or $49/yr) removes it, raises the file size limit to 500 MB, and unlocks unlimited batch conversion.

Are my files uploaded to a server?

No — and you can verify it yourself. Open DevTools → Network tab, then convert a file. You'll see zero upload requests. Everything runs right in your browser. We never see your files.

How long does conversion take?

Usually 1–3 seconds for a typical file. The very first conversion on a fresh page load may take 5–20 seconds while the converter engine loads — after that it's instant. Your CPU does all the work locally.

What is the file size limit?

Free: up to 10 MB per file, 5 files per batch. Pro: up to 500 MB per file, unlimited batch. If you're working with large videos or RAW photos, Pro is built for that.

Can I batch convert multiple HEIC files at once?

Yes — drop multiple files at once (or Ctrl/Cmd+click to select them) and they all convert in parallel. Free accounts handle up to 5 files per batch; Pro has no limit.

Will the image quality change after conversion?

It depends on the formats involved. Converting to a lossless format like PNG preserves every pixel exactly. Converting to a lossy format like JPEG or WebP applies compression — we default to 85% quality, which looks identical to the original for almost all images. You won't notice a difference unless you zoom in pixel-by-pixel.

Do you support batch image conversion?

Yes — drop multiple images at once and they all convert in parallel. Free accounts handle up to 5 at a time; Pro is unlimited. Download everything as a single ZIP when you're done.

What sizes are included in the ICO output?

The converter produces a multi-resolution ICO containing 16×16, 32×32, and 48×48 pixel frames — the standard sizes Windows and browsers use for favicons and application icons.

My HEIC is a photo, not a logo — will the ICO look good?

ICO files are tiny, so detail-heavy photos look muddy at icon size. For best results, crop your HEIC to a square containing just the subject before converting.

How private is this converter?

Completely private — by design, not policy. There is no upload endpoint. Files are processed right inside your browser tab and disappear the moment you close it. We collect only anonymous page-view counts; your file content is never seen or stored.

HEIC to ICO Converter — Free, Online, No Upload

How to convert HEIC to ICO online

1
Drop your HEIC file
Drag and drop your High Efficiency Image Container file onto the converter, or click to browse your files. You can select up to 5 at once. Nothing leaves your device — conversion happens right here in the browser.
2
Hit Convert — it happens locally
Click Convert and watch it go. There's no upload, no server queue, no waiting. The converter runs High Efficiency Image Container → Windows Icon Format entirely in your browser tab. Most files finish in 1–3 seconds.
3
Download your ICO
Your Windows Icon Format file is ready. Click Download, or grab a ZIP if you converted a batch. Close the tab and everything disappears — no copies kept anywhere.

HEIC vs ICO: format overview

HEIC

High Efficiency Image Container

Apple (based on MPEG HEIF/ISO spec) · 2017

Compression: lossy
Color depth: 12-bit
Transparency: Yes

✓ 50% smaller than JPEG at equivalent quality
✓ Supports 16-bit depth and HDR
✗ Poor browser support

ICO

Windows Icon Format

Microsoft · 1985

Compression: lossless
Transparency: Yes

✓ Multiple resolutions in a single file
✓ Required format for Windows app icons and favicons

HEIC magic bytes: 00 00 00 18 66 74 79 70 68 65 69 63

ICO magic bytes: 00 00 01 00

Why convert HEIC to ICO?

It's not common, but it happens: you take a photo on your iPhone — a logo on a whiteboard, a product shot, a portrait — and you want to use it as a favicon or application icon. The problem is that .heic files are completely unrecognized by browser tooling, Windows icon editors, and favicon generators, so you can't use the photo directly.

ICO is the format Windows uses for application icons and the format browsers use for favicons. It can contain multiple image sizes packed into a single file — typically 16×16, 32×32, and 48×48 pixels — so the operating system or browser can pick the right size for the context. Converting HEIC to ICO handles the format translation and the resizing in one step.

Keep in mind that favicon and icon images are tiny. The fine detail of a photograph rarely survives being scaled to 32×32 pixels, so results depend heavily on what's in the photo. Simple shapes, logos, and high-contrast images work well. Complex scenes and faces tend to become unrecognizable at icon sizes. If you need a polished icon, use the converted image as a starting point and refine it in a tool like GIMP, Figma, or RealFaviconGenerator before deploying it.

Quality & file size: HEIC to ICO

Typical file sizes: HEIC 1.5–3 MB → ICO 10–100 KB.

Converting from lossy HEIC to lossless ICO will not recover detail the HEIC codec already discarded — but the output will not degrade any further. This is useful when you need a lossless format for editing or compatibility without additional compression artifacts.

Color depth: HEIC supports 12-bit, ICO supports standard color.

Transparency: HEIC supports transparency. ICO preserves transparency.

Frequently asked questions

Privacy: how FormatDrop handles your files

Your HEICfiles are converted 100% inside your browser. They are never uploaded to our servers, never stored, and never seen by anyone other than you. This isn't a privacy policy claim — it's an architectural guarantee: our server has no endpoint that receives file bytes.