Convert PNG to ICO free in your browser. Batch convert, set the quality and download instantly. Your images are never uploaded.
Add your PNG files, adjust the settings and download ICO files. Everything runs in your browser, so your images are never uploaded.
Loading the converter…
To convert PNG to ICO online, add a square PNG of at least 256 pixels, tick the icon sizes you need (16, 32, 48 and 256 are the usual set), press Convert and download the .ico file. It contains every size you picked, with transparency. Nothing is uploaded.
Create a favicon.ico or Windows icon from any PNG. The finished file holds several sizes in one, so browsers and Windows can always choose the sharpest version. It is a free tool from Websolindia, a New Delhi website design and SEO company that builds fast, image-optimised websites.
Unlike most online converters, this tool does not upload your images. Your browser decodes each PNG file, converts it and creates the ICO file on your own device. That keeps private photos private, avoids upload waits and keeps working on a slow connection once the page has loaded. You can convert up to 50 files at a time and download them one by one or together as a ZIP.
Need to go the other way? Use our ICO to PNG Converter Online. For related jobs, try the PNG to JPG Converter Online, or browse every tool in the Websolindia image converter collection. Once your favicon is in place, our Website SEO Analyzer can check the rest of your site.
This table compares the two formats so you can decide whether converting is the right move.
| Feature | PNG | ICO |
|---|---|---|
| Full name | PNG (Portable Network Graphics) | ICO (Windows icon) |
| Origin | W3C Recommendation in 1996 | Microsoft's Windows icon format |
| Compression | Lossless | Holds PNG or bitmap images |
| Transparency | Yes, full alpha (256 levels of transparency) | Yes |
| Animation | No (animated PNG is a separate extension) | No |
| Colour depth | Up to 16 bits per channel | Up to 32-bit colour per image |
| Typical file size | Large for photos, small for flat graphics | Small |
| Best for | Logos, screenshots, graphics and anything needing transparency | Favicons and Windows application icons |
| Browser support | Every browser, app and device | Every browser for favicons |
| File extension | .png | .ico |
File size: ICO files are small: each size is stored as a compressed PNG inside the file.
This is exactly what happens to your file. Nothing is hidden, and you can verify that nothing is uploaded by watching your browser's network tab while you convert.
| Step | What happens |
|---|---|
| 1. Read the file locally | Your browser reads the file from your device into memory. Nothing is sent to a server. |
| 2. Identify the format | We check the file's first bytes (its signature) instead of trusting the extension, so a PNG renamed to .jpg is still handled correctly. |
| 3. Decode the PNG to pixels | The image is decoded to raw red, green, blue and alpha pixels using your browser's built-in PNG decoder. |
| 4. Fit each icon size | For every size you tick, the picture is scaled to fit inside a square and centred on transparent padding, so it is never stretched. |
| 5. Keep transparency | Every icon frame keeps its alpha channel, so corners and soft edges stay transparent. |
| 6. Encode the ICO | The pixels are written out as ICO using each size is encoded as a PNG and packed into an ICO container by our own code. |
| 7. Report the result | We show the dimensions, the sizes before and after, and the change: (new size − original size) ÷ original size × 100. For example, 500 KB becoming 350 KB is −30%. |
| Setting | Default | Range | What it does |
|---|---|---|---|
| Icon sizes | 16, 32, 48, 256 | 16, 24, 32, 48, 64, 96, 128, 256 | Every ticked size is stored inside the one .ico file. |
| What | Formula | Notes |
|---|---|---|
| Size change | (new − original) ÷ original × 100 | Shown for every file. Negative means smaller. |
| Icon frame scale | min(size ÷ width, size ÷ height) | The image is centred in a size × size transparent square. |
Speed depends on your device and the image size. In our Chrome tests on a desktop-class processor, a 6-megapixel photograph took about 2 seconds to convert to WebP or PNG. AVIF is the slowest: about 2.5 seconds on Fast and about 7.5 seconds on Balanced. Phones and older laptops take longer, and images over about 120 megapixels are declined rather than risking a frozen browser.
| Format | Where it opens | Typical use |
|---|---|---|
| PNG | Every browser, app and device | Logos, screenshots, graphics and anything needing transparency |
| ICO | Every browser for favicons | Favicons and Windows application icons |
| This converter | Current Chrome, Edge, Firefox and Safari. Needs JavaScript | Private conversion on your own device |
Upload the file to your site root and link it from the head of your pages. Browsers also request /favicon.ico automatically.
<link rel="icon" href="/favicon.ico" sizes="any">
<!-- optional modern companions -->
<link rel="icon" href="/icon.svg" type="image/svg+xml">
<link rel="apple-touch-icon" href="/apple-touch-icon.png">16, 32 and 48 pixels cover browsers and most uses; add 256 pixels for Windows. The default selection is 16, 32, 48 and 256.
Square and at least 256 × 256 pixels. A simple, high-contrast design reads best at 16 and 32 pixels.
It is scaled to fit and centred with transparent padding, so it is never stretched or cropped.
Google's favicon guidelines ask for a square image whose side is a multiple of 48 pixels, such as 48, 96 or 144. A 48 pixel frame in your ICO meets the minimum; you can also link a larger PNG or SVG.
Upload the file to your site root and add a link tag, as shown in the code sample above. Browsers also request /favicon.ico automatically.
Yes, with the ICO to PNG Converter Online, which can export every size as a separate image.
Yes. It is free, needs no sign-up, adds no watermark and has no daily limit. You can convert up to 50 PNG files in one go. It is provided by Websolindia.
No. Your PNG files are read and converted inside your browser, on your own device. They are never sent to Websolindia or anyone else, which is why this converter is safe for private photos and documents.
Yes. The new file is created from the decoded pixels, so camera details, GPS location and other embedded metadata are not copied. If you need to keep metadata, use a desktop editor.
Up to 50 files per batch and 150 MB per file. Images above roughly 120 megapixels are declined with a clear message rather than freezing your browser.
Current versions of Chrome, Edge, Firefox and Safari.
Websolindia built it. We are a New Delhi website design, SEO and digital marketing company serving businesses since 2014. We also build fast websites with properly optimised images; see our website designing and SEO services.
All converters: Websolindia Image Converter