Are my uploaded images kept private and secure?

Yes! All uploaded and converted files are stored in temporary isolated storage and permanently auto-deleted after 2 hours. We never inspect, sell, or store your private images.

Can I convert iPhone HEIC photos to JPG or PNG?

Yes! Our server-side decoding engine supports Apple HEIC/HEIF photos from iPhone cameras, auto-rotates EXIF orientation, and renders standard universal JPG or PNG files.

What is the advantage of converting PNG or JPG to WebP?

Google WebP offers 25% to 35% smaller file sizes than JPG at equivalent visual quality while supporting transparent alpha channels. Converting your website images to WebP improves Google Core Web Vitals and SEO rankings.

Is there a limit on how many images I can convert?

ConvertHub is 100% free with unlimited single and batch conversions for files up to 25 MB with no registration or credit card required.

ConvertHubPRO / FREE

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Image Converters•Favicon Maker

PNG to ICO

Convert PNG icons into Windows icon and favicon ICO format for websites and apps.

Instant browser processing Private & Auto-Purged

Drag & drop your files here, or browse

Max file size: 25MB (Free Tier)

Supports AVIFSVGHEIC (iPhone)PNGJPGWebPGIFICOTIFF (Up to 10 files)

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How to Convert with PNG to ICO

Follow these 3 simple steps to complete your conversion in seconds.

Step 1 of 3

Upload Your File

Drag and drop your file into the secure dropzone above or click Browse to select from your device.

💡 Tip: Files up to 25MB are completely free.

Step 2 of 3

Choose Conversion Parameters

Adjust target quality, output format, or unit settings as needed.

Step 3 of 3

Get Instant Output & Share

Click download to save your converted file. All files are automatically deleted after 1 hour.

Vector SVG Rasterization & Favicon Multi-Packing Specification

Formula representation used for accurate calculations:

Multi-Pack ICO Container = Header (6 bytes) + Directory Entries (16 bytes × N resolutions) + Embedded PNG Streams (16px, 32px, 48px, 64px) Raster Density: Rendered at 300+ DPI with Lanczos resampling and anti-aliased alpha transparency.

Calculation Example: A scalable vector SVG renders into a crisp 1024×1024 PNG asset and packs into a standard 4-layer Windows .ico favicon container (16/32/48/64px).

Image Formats Comparison Reference Matrix

Quick reference lookup table for standard unit calculations.

Comparative technical matrix across modern raster and vector image formats.
Image Format	Transparency & Alpha	Typical Size vs JPG
WebP (.webp)	Full Alpha Support (24/32-bit)	25%–35% Smaller
HEIC (.heic)	Alpha & Depth Map Support	50% Smaller
AVIF (.avif)	Alpha & 12-bit HDR	50% Smaller
JPG / JPEG (.jpg)	No Transparency (Opaque)	Baseline (0%)
PNG (.png)	Lossless True Alpha Channel	200%–400% Larger
GIF (.gif)	1-Bit Binary Transparency	Indexed 256 Colors
SVG (.svg)	Vector Alpha Transparency	Infinite Resolution
ICO (.ico)	32-bit Alpha Multi-Res Favicon	16px to 256px

Frequently Asked Questions

Common questions and answers about PNG to ICO.

ConvertHub leverages high-performance Sharp and MozJPEG rendering pipelines. Our default 85% balanced quality setting maintains high visual fidelity and sharpness while eliminating unnecessary byte overhead.