What sizes does the ICO file contain?

Each ICO output contains six embedded PNG frames: 16×16, 32×32, 48×48, 64×64, 128×128, and 256×256 pixels. Modern Windows and browsers select the best size automatically.

Why convert JPG to ICO?

ICO is the standard format for Windows application icons and browser favicons. If you have a photo or logo as a JPG file that you want to use as an icon, converting to ICO is the right step.

Can I convert multiple JPG files at once?

Yes — this tool supports batch conversion. Drop up to 25+ files at once, monitor per-file status, then download individually or as a single ZIP archive.

Does my data get uploaded to a server?

Never. All JPG decoding and ICO encoding happens entirely in your browser using JavaScript. Your images never leave your device.

What software opens ICO files?

ICO files open natively in Windows Explorer (as icons), web browsers (as favicons), GIMP, Photoshop (with a plugin), and most professional image editors.

JPG to ICO Converter

Convert JPG and JPEG images to ICO icon files locally in your browser. Each ICO contains six sizes (16–256 px) embedded as PNG frames. Batch convert, preview thumbnails, download individually or as a ZIP. No uploads, no account required.

🖼️

Drop JPG/JPEG files here

or Browse Files · Multiple files supported

Download as ZIP ZIP named with timestamp · Individual download always available per file

What This Tool Does

Converts JPG and JPEG images to ICO format entirely in your browser. Each ICO output contains six embedded PNG frames at standard icon sizes (16×16, 32×32, 48×48, 64×64, 128×128, and 256×256 pixels). No server upload, no account, no file size limits imposed by a backend. JPG files are decoded natively by your browser — no extra libraries needed.

Who This Is For

Web developers who need a favicon from a JPG logo or photo
Windows app developers who need an ICO file for application icons
Designers converting JPG brand marks or portraits into multi-size icon assets
Anyone who needs a quick ICO from a JPG image without installing software

Example: Input: logo.jpg → Output: logo.ico (multi-size icon, ready for favicon or Windows app use)

💡 Need a web-optimized image instead? Try JPG to WebP for faster web delivery. For lossless quality, use JPG to PNG. To compress images, use the Image Compressor.

Related Guides & Tutorials

Guide

JPG to ICO: Complete Conversion Guide

What ICO format is, when to use it for favicons and Windows icons, and how to get the best results from JPG source images.

Tutorial

How to Convert JPG to ICO: Step-by-Step

A hands-on walkthrough for converting JPG images to ICO in your browser — batch mode, multi-size output, ZIP download, and more.

Guide

JPG to PNG Converter Guide

When to convert JPG to lossless PNG for better quality and transparency support.

Tool

⬇ Image Resizer

How It Works

Drop your JPG filesDrag multiple .jpg or .jpeg files onto the drop zone, or click Browse Files. Thumbnails generate immediately.

Click Convert to ICOYour browser decodes each JPG to pixel data natively; the ICO encoder scales to six sizes and builds a standards-compliant ICO blob in memory.

Download your ICOsDownload files individually or check "Download as ZIP" for a single timestamped archive. App resets after export.

🔒 Privacy & Security

All decoding and encoding runs entirely in your browser. JPG files are never sent to any server — they stay in your browser's memory from load to download. This is especially important for personal, business, or client photos.

You Might Also Need

JPG to PNG → JPG to WebP → JPG to SVG → Image Resizer → Image Compressor →

JPG vs ICO: Format Comparison

Property	JPG	ICO
Primary use	Photography, web images	Application icons, favicons
Typical dimensions	Any size — often megapixels	16×16 to 256×256 px
Multi-size support	No	Yes — multiple frames in one file
Transparency (alpha)	None	Full 32-bit RGBA transparency
Compression	Lossy JPEG	Lossless PNG frames (modern)
Platform support	Universal	Windows, all browsers (favicon)
Best for	Photos, sharing, web content	App icons, favicons, Windows UI
Internal format	DCT-compressed pixel data	PNG or BMP frames embedded

Frequently Asked Questions

What sizes does the output ICO contain?▼

Each ICO file contains six PNG frames: 16×16, 32×32, 48×48, 64×64, 128×128, and 256×256 pixels. Windows and browsers automatically select the most appropriate size for the context.

Can I use the ICO as a favicon?▼

Yes — ICO is the original favicon format. Rename the output to favicon.ico and place it in your website root. All browsers will use it automatically, selecting the most appropriate embedded size.

Can I convert multiple files at once?▼

Yes — drop up to 25 or more files at once. The tool processes them sequentially, shows per-file status badges, and lets you download all ICOs individually or as a single timestamped ZIP.

Does the ICO support transparency?▼

Yes — the ICO frames are encoded as 32-bit RGBA PNG, which supports full alpha channel transparency. JPG itself does not have transparency, so the output background will be white unless the source image already has clean edges suitable for icon use.

Is this tool free with no limits?▼

Yes — completely free with no file size limits, no per-conversion limits, and no account required. Processing happens in your browser so we never see your files.

What is the ZIP file named?▼

The ZIP is named dataconversioncenter_jpg_to_ico_YYYYMMDDHHMM.zip using your local time — for example dataconversioncenter_jpg_to_ico_202603051709.zip.