{"id":1156,"date":"2026-08-14T15:13:00","date_gmt":"2026-08-14T19:13:00","guid":{"rendered":"https:\/\/www.xconvert.com\/blog\/?p=1156"},"modified":"2026-06-27T03:01:43","modified_gmt":"2026-06-27T07:01:43","slug":"convert-an-image-to-ico-favicon","status":"publish","type":"post","link":"https:\/\/www.xconvert.com\/blog\/convert-an-image-to-ico-favicon","title":{"rendered":"How to Convert an Image to ICO (Favicon)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">You dropped a PNG in your site root, named it <code>favicon.ico<\/code>, and the browser tab still shows a blank page icon. The problem is the format: renaming a PNG doesn\u2019t make it an ICO, and a JPEG favicon comes out with an ugly solid box behind it because JPEG can\u2019t store transparency. ICO is a Windows icon <em>container<\/em> \u2014 one file that can hold several sizes at once \u2014 and it\u2019s still the universal fallback every browser will request. This guide covers what ICO is, why a transparent PNG is the right source, which sizes to pack in, and how to make the file. We verified the format facts and favicon behavior against MDN and the ICO specification.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Quick answer:<\/strong> Start from a <strong>square PNG with a transparent background<\/strong> (not a JPEG \u2014 JPEG has no transparency, so the favicon gets a solid backing). Convert it to <strong>ICO<\/strong> and pack the standard favicon sizes \u2014 <strong>16\u00d716, 32\u00d732, and 48\u00d748<\/strong> \u2014 into the single file. Put the result at your site root as <code>\/favicon.ico<\/code>. Modern browsers also accept PNG and SVG favicons via <code>&lt;link rel=&quot;icon&quot;&gt;<\/code>, but <code>favicon.ico<\/code> remains the universal fallback, so keep it. A single ICO image maxes out at <strong>256\u00d7256<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Jump to a section<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"#what\">What ICO is (and why favicons use it)<\/a><\/li><li><a href=\"#source\">Why your source should be a transparent PNG, not a JPEG<\/a><\/li><li><a href=\"#sizes\">Which sizes to put in the favicon<\/a><\/li><li><a href=\"#formats\">ICO vs PNG vs SVG favicons in 2026<\/a><\/li><li><a href=\"#tool\">Convert an image to ICO on xconvert<\/a><\/li><li><a href=\"#faq\">FAQ<\/a><\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"what\">What ICO is (and why favicons use it)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>ICO is the image file format for computer icons in Microsoft Windows.<\/strong> Its defining trick is that a single <code>.ico<\/code> file is a <em>container<\/em>: per Wikipedia\u2019s spec summary, \u201cICO files contain one or more small images at multiple sizes and color depths, such that they may be scaled appropriately.\u201d Internally the file is an <code>ICONDIR<\/code> (\u201cicon directory\u201d) holding one <code>ICONDIRENTRY<\/code> per image \u2014 so one favicon.ico can carry a crisp 16\u00d716 for the tab, a 32\u00d732 for the taskbar\/bookmarks, and a 48\u00d748 for larger surfaces, and the OS or browser picks the best match.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That container design is why <code>favicon.ico<\/code> became the web\u2019s default site icon. When a browser loads a site, it will request <code>\/favicon.ico<\/code> from the site root even if your HTML doesn\u2019t link one \u2014 so a well-formed ICO at the root is the safe baseline that works in essentially every browser. MDN defines a favicon as \u201ca tiny icon included along with a website, which is displayed in places like the browser\u2019s address bar, page tabs and bookmarks menu,\u201d noting it is \u201cusually 16\u00d716 pixels in size and stored in the GIF, PNG, or ICO file format.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Two hard limits worth knowing:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>A single ICO image maxes out at 256\u00d7256 pixels.<\/strong> Win32 introduced support for icon images \u201cup to 16.7 million colors (TrueColor) and up to 256\u00d7256 pixels in dimensions.\u201d There\u2019s no 512\u00d7512 ICO entry \u2014 for larger app icons you use PNG.<\/li><li><strong>ICO supports full alpha transparency<\/strong> (32-bit color with an alpha channel), which lets a favicon sit cleanly on a light or dark tab.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"source\">Why your source should be a transparent PNG, not a JPEG<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This is the single most common favicon mistake. <strong>JPEG cannot store transparency<\/strong> \u2014 every JPEG has an opaque background. So if you convert a JPEG logo to ICO, whatever was \u201cwhite space\u201d around your logo becomes a literal rectangle baked into the icon. On a browser tab using a dark theme, that box looks broken.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The fix is to start from a <strong>PNG with a real transparent background<\/strong> (or an SVG exported to transparent PNG). PNG supports an alpha channel, so the transparency carries through into the ICO and your icon\u2019s shape \u2014 not a square \u2014 is what shows.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Two more source rules that save grief:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Make it square.<\/strong> Favicons render in square slots; a non-square source gets letterboxed or distorted, so crop to 1:1 first.<\/li><li><strong>Start big, then downscale.<\/strong> A high-resolution square source (256\u00d7256, ideally larger) downsamples to crisp 16\/32\/48 layers far better than upscaling a tiny image.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">You can convert a JPEG to ICO \u2014 fine for an opaque, photo-style icon \u2014 but if your logo has any transparent area, convert the <strong>PNG<\/strong> version; we have a dedicated <a href=\"https:\/\/www.xconvert.com\/convert-png-to-ico\">PNG-to-ICO tool<\/a> for that. If your only copy is a JPEG, <a href=\"https:\/\/www.xconvert.com\/blog\/convert-png-to-jpg\/\">convert it to PNG first<\/a> and re-add transparency before making the icon.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"sizes\">Which sizes to put in the favicon<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Because ICO is multi-size, you don\u2019t pick <em>one<\/em> size \u2014 you pack a few. The standard for a clean <code>favicon.ico<\/code>:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Size<\/th><th>Where it shows<\/th><\/tr><\/thead><tbody><tr><td><strong>16\u00d716<\/strong><\/td><td>Browser tab, address bar, bookmark lists \u2014 the smallest, most-used layer<\/td><\/tr><tr><td><strong>32\u00d732<\/strong><\/td><td>Higher-DPI tabs, Windows taskbar, some bookmark bars<\/td><\/tr><tr><td><strong>48\u00d748<\/strong><\/td><td>Windows site shortcuts and larger icon surfaces<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A minimal modern <code>favicon.ico<\/code> should contain at least <strong>16\u00d716 and 32\u00d732<\/strong>; adding <strong>48\u00d748<\/strong> covers Windows shortcut surfaces. For a single-size file, 32\u00d732 (or 48\u00d748) is the safe choice \u2014 but the whole point of ICO is that you don\u2019t have to choose.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">What you do <em>not<\/em> put in the ICO are the large platform icons: the <strong>Apple Touch Icon<\/strong> (180\u00d7180 PNG) and Android\/PWA manifest icons (commonly 192\u00d7192 and 512\u00d7512 PNG) are separate PNG files referenced from your HTML\/manifest \u2014 they exceed ICO\u2019s 256\u00d7256 ceiling anyway.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"formats\">ICO vs PNG vs SVG favicons in 2026<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Modern browsers don\u2019t <em>require<\/em> ICO anymore. Using <code>&lt;link rel=&quot;icon&quot;&gt;<\/code> you can serve a PNG or SVG favicon, and the browser picks among them: per MDN, \u201cif there are multiple <code>&lt;link rel=&quot;icon&quot;&gt;<\/code>s, the browser uses their <code>media<\/code>, <code>type<\/code>, and <code>sizes<\/code> attributes to select the most appropriate icon,\u201d and \u201cif several icons are equally appropriate, the last one is used.\u201d A robust setup links an SVG (scales perfectly, tiny file), a PNG fallback, and keeps <code>favicon.ico<\/code> for everything else:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Format<\/th><th>Transparency<\/th><th>Scales<\/th><th>Best for<\/th><\/tr><\/thead><tbody><tr><td><strong>ICO<\/strong><\/td><td>Yes (alpha)<\/td><td>No (bitmap, multi-size)<\/td><td>The universal <code>favicon.ico<\/code> fallback at site root<\/td><\/tr><tr><td><strong>PNG<\/strong><\/td><td>Yes (alpha)<\/td><td>No (bitmap)<\/td><td>Apple Touch \/ Android \/ manifest icons; modern fallback<\/td><\/tr><tr><td><strong>SVG<\/strong><\/td><td>Yes<\/td><td>Yes (vector)<\/td><td>Crisp modern favicon at any DPI (modern browsers only)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The practical takeaway: <strong>keep <code>favicon.ico<\/code> as the baseline<\/strong> \u2014 browsers request it from the root and it never fails to display \u2014 and <em>layer<\/em> PNG\/SVG on top via <code>&lt;link&gt;<\/code> for sharper rendering on modern clients. ICO isn\u2019t obsolete; it\u2019s the floor everything else stands on. (One gotcha: the old <code>rel=&quot;shortcut icon&quot;<\/code> is non-conforming per MDN \u2014 use plain <code>rel=&quot;icon&quot;<\/code>.)<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"tool\">Convert an image to ICO on xconvert<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <a href=\"https:\/\/www.xconvert.com\/convert-jpeg-to-ico\">xconvert JPEG-to-ICO converter<\/a> and its <a href=\"https:\/\/www.xconvert.com\/convert-png-to-ico\">PNG-to-ICO<\/a> sibling turn your square image into a ready-to-use icon. Use the <strong>PNG<\/strong> tool if your logo has transparency, the JPEG tool for an opaque photo-style icon.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"1250\" src=\"https:\/\/www.xconvert.com\/blog\/wp-content\/uploads\/2026\/06\/step-01-control-81.png\" alt=\"Set the size Preset to 48P for a standard favicon layer\" class=\"wp-image-1401\" srcset=\"https:\/\/www.xconvert.com\/blog\/wp-content\/uploads\/2026\/06\/step-01-control-81.png 1600w, https:\/\/www.xconvert.com\/blog\/wp-content\/uploads\/2026\/06\/step-01-control-81-300x234.png 300w, https:\/\/www.xconvert.com\/blog\/wp-content\/uploads\/2026\/06\/step-01-control-81-1024x800.png 1024w, https:\/\/www.xconvert.com\/blog\/wp-content\/uploads\/2026\/06\/step-01-control-81-768x600.png 768w, https:\/\/www.xconvert.com\/blog\/wp-content\/uploads\/2026\/06\/step-01-control-81-1536x1200.png 1536w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\" \/><\/figure>\n\n\n\n<ol class=\"wp-block-list\"><li>Open <a href=\"https:\/\/www.xconvert.com\/convert-png-to-ico\">xconvert.com\/convert-png-to-ico<\/a> (or <code>\/convert-jpeg-to-ico<\/code>) and click <strong>Upload<\/strong> to add your square image \u2014 from your computer, Google Drive, or Dropbox.<\/li><li>Open <strong>Advanced Options<\/strong>. The page notes its defaults are optimized for the best results, so you can skip this for a standard favicon.<\/li><li>To set the icon dimensions, use the size <strong>Preset<\/strong> dropdown (it defaults to <strong>256P<\/strong>). Available presets include <strong>16, 32, 48, 64, 128 and 256<\/strong> pixels, or enter a custom <strong>width \u00d7 height<\/strong>. For a favicon, 48\u00d748 or 32\u00d732 is a safe single-size pick.<\/li><li>Click <strong>Convert<\/strong>. The file is processed on our servers and downloads as a <code>.ico<\/code>.<\/li><li>Rename it <code>favicon.ico<\/code>, drop it in your website\u2019s <strong>root<\/strong> directory, and (optionally) add the <code>&lt;link rel=&quot;icon&quot;&gt;<\/code> tags above for PNG\/SVG fallbacks.<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Your file uploads over an encrypted connection, is processed on our servers, and is deleted automatically a few hours later. Nothing lingers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For related image prep: <a href=\"https:\/\/www.xconvert.com\/blog\/convert-png-to-jpg\/\">convert PNG to JPG (and back)<\/a> when you need to swap formats before making the icon.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"faq\">FAQ<\/h2>\n\n\n\n<h5 class=\"wp-block-heading\">What format should a favicon be?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">For maximum compatibility, <strong>ICO<\/strong> \u2014 saved as <code>favicon.ico<\/code> at your site root, because browsers request that file by default and every browser can display it. Modern browsers also accept <strong>PNG<\/strong> and <strong>SVG<\/strong> favicons via <code>&lt;link rel=&quot;icon&quot;&gt;<\/code>, which render sharper at high DPI, but you should still keep the ICO as the universal fallback. Per MDN, favicons are typically stored in GIF, PNG, or ICO format.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Can a single ICO file hold multiple sizes?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Yes \u2014 that\u2019s the whole point of ICO.<\/strong> One <code>.ico<\/code> file is a container that can store several images at different sizes and color depths (commonly 16\u00d716, 32\u00d732, and 48\u00d748), and the browser or OS picks the best match for where the icon is shown. A single ICO image can be up to <strong>256\u00d7256<\/strong> pixels.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Should I use a JPEG or a PNG to make a favicon?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Use a PNG with a transparent background.<\/strong> JPEG can\u2019t store transparency, so a JPEG-sourced favicon gets a solid rectangle baked behind your logo, which looks wrong on themed tabs. PNG (or an SVG exported to transparent PNG) preserves the icon\u2019s real shape. JPEG is only fine for an opaque, photo-style icon with no transparency.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">What size should a favicon be?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">The classic favicon layer is <strong>16\u00d716<\/strong>, but a good <code>favicon.ico<\/code> packs <strong>16\u00d716, 32\u00d732, and 48\u00d748<\/strong> together. If you want a single size, <strong>32\u00d732 or 48\u00d748<\/strong> is the safe choice. Large platform icons (Apple Touch 180\u00d7180, Android\/PWA 192\u00d7192 and 512\u00d7512) are separate PNG files, not part of the ICO.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Where do I put the favicon.ico file?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">In your website\u2019s <strong>root directory<\/strong>, named exactly <code>favicon.ico<\/code>. Browsers automatically request <code>\/favicon.ico<\/code> from the root even if your HTML doesn\u2019t reference it, so placing it there guarantees a baseline icon. You can additionally point to it (and to PNG\/SVG icons) with <code>&lt;link rel=&quot;icon&quot; href=&quot;\/favicon.ico&quot;&gt;<\/code> in your <code>&lt;head&gt;<\/code>.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Is favicon.ico obsolete now that browsers support PNG and SVG?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>No.<\/strong> ICO is no longer the <em>only<\/em> option, but it\u2019s still the universal fallback: browsers request <code>\/favicon.ico<\/code> from the root, and it displays everywhere including older clients. Best practice is to keep <code>favicon.ico<\/code> as the floor and layer a PNG and\/or SVG on top via <code>&lt;link rel=&quot;icon&quot;&gt;<\/code> for crisper modern rendering.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Sources<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Last verified 2026-06-25.<\/em><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Glossary\/Favicon\">MDN \u2014 Favicon (Glossary)<\/a> \u2014 definition of a favicon; \u201cusually 16\u00d716 pixels \u2026 stored in the GIF, PNG, or ICO file format.\u201d<\/li><li><a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/HTML\/Reference\/Attributes\/rel\">MDN \u2014 rel=\u201cicon\u201d (HTML rel attribute)<\/a> \u2014 how browsers select among multiple <code>&lt;link rel=&quot;icon&quot;&gt;<\/code> by media\/type\/sizes; last-equally-appropriate rule; <code>shortcut<\/code> is non-conforming.<\/li><li><a href=\"https:\/\/en.wikipedia.org\/wiki\/ICO_(file_format)\">Wikipedia \u2014 ICO (file format)<\/a> \u2014 ICO as the Windows icon format; multi-image container (ICONDIR\/ICONDIRENTRY); 256\u00d7256 maximum and up to 16.7M-color\/32-bit-alpha support.<\/li><li><a href=\"https:\/\/www.xconvert.com\/convert-jpeg-to-ico\">xconvert \u2014 JPEG to ICO converter<\/a> and <a href=\"https:\/\/www.xconvert.com\/convert-png-to-ico\">PNG to ICO converter<\/a> \u2014 live tool UI (Upload, Advanced Options, size Preset dropdown, Convert) and favicon size guidance.<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Convert a JPEG or PNG image to an ICO favicon. Why a transparent PNG beats a JPEG, which sizes (16\/32\/48) to pack, and how to make favicon.ico.<\/p>\n","protected":false},"author":4,"featured_media":1403,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,14],"tags":[],"class_list":["post-1156","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-how-to-guides","category-tools"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Convert an Image to ICO (Favicon)<\/title>\n<meta name=\"description\" content=\"Convert a JPEG or PNG image to an ICO favicon. 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