Fontello
Custom Icon Font Generator
Free
Support platforms
web
What is Fontello
Fontello is a high-performance web utility that allows developers to build custom icon fonts from vector SVG files. Unlike monolithic icon libraries like Font Awesome, Fontello enables users to cherry-pick specific icons from various sets or upload their own custom SVGs, resulting in significantly reduced bundle sizes. It automatically generates CSS, WOFF, EOT, and TTF files, ensuring cross-browser compatibility. By stripping unused glyphs, it optimizes web performance and minimizes HTTP requests, making it an essential tool for front-end engineers focused on lean, performant UI architecture.
Fontello 's Core features
Custom Icon Subset Selection
Fontello allows you to select only the specific glyphs required for your application. By excluding thousands of unused icons, you can reduce your font file size from hundreds of kilobytes to just a few kilobytes. This granular control directly improves Core Web Vitals, specifically reducing Largest Contentful Paint (LCP) times by minimizing the payload size of critical assets.
SVG to Font Conversion
The platform includes a robust engine that converts vector SVG paths into standardized font formats (WOFF, WOFF2, TTF, EOT). It handles path normalization and coordinate scaling automatically, ensuring that your custom icons render crisply at any resolution. This is superior to using raw SVGs in the DOM, as it allows for easy color and size manipulation via standard CSS properties like 'color' and 'font-size'.
Automatic CSS Generation
Upon download, Fontello provides a ready-to-use CSS file that includes all necessary @font-face declarations and class definitions. This eliminates the manual overhead of writing boilerplate CSS for icon positioning, line-height adjustments, and vertical alignment. The generated code is optimized for modern browsers, ensuring consistent rendering across Chrome, Firefox, Safari, and Edge without requiring complex polyfills.
Unicode Mapping Control
Users have full control over the Unicode mapping for each icon. This is critical for developers integrating icons into legacy systems or complex design systems where specific character codes might already be reserved. By manually assigning codes, you prevent character collisions and ensure that your icon font integrates seamlessly with existing typography stacks without unexpected behavior.
Cross-Platform Compatibility
Fontello generates multiple font formats simultaneously to ensure maximum browser compatibility. While WOFF2 is preferred for modern browsers due to its superior compression, Fontello includes older formats like EOT and TTF to support legacy environments. This ensures that your UI remains consistent across a wide range of devices, from modern smartphones to older desktop browsers, without requiring additional build-time conversion tools.
How to use Fontello
Navigate to fontello.com and browse the integrated icon collections or drag-and-drop your own SVG files into the 'Custom Icons' tab.,Select the specific icons you need for your project by clicking on them; selected icons will be highlighted in red.,Navigate to the 'Customize Names' tab to rename your icons, which will define the CSS class names used in your stylesheet.,Go to the 'Customize Codes' tab to map your icons to specific Unicode characters if you need to avoid conflicts with existing character sets.,Click the red 'Download webfont' button in the top right corner to receive a ZIP archive containing the generated fonts and CSS.,Extract the files into your project directory and link the generated CSS file to your HTML to start using the icons via class names.
Use cases of Fontello
Optimizing Web Performance
Front-end developers use Fontello to replace heavy icon libraries. By creating a custom font containing only the 20-30 icons actually used in a web app, they reduce the total asset size by up to 90%, leading to faster page loads and improved SEO rankings.
Branding with Custom Icons
Designers and developers collaborate to convert proprietary brand logos and unique UI elements into a single, cohesive icon font. This allows the brand assets to be styled using CSS, enabling dynamic color changes on hover or state changes.
Rapid Prototyping
UI/UX designers use Fontello to quickly assemble a set of icons from multiple open-source collections (like Entypo or Iconic) to test interface concepts. It provides a unified way to manage disparate icon styles within a single project.
Who benefits from Fontello
Front-End Developers
Need to manage icon assets efficiently while keeping bundle sizes small. Fontello solves the problem of 'bloated' icon libraries by providing a streamlined, custom-tailored font file.
UI/UX Designers
Require a way to implement custom vector icons into web projects without relying on developers to manually export and optimize individual SVG files for every screen size.
Performance Engineers
Focused on reducing HTTP requests and asset payload sizes. They use Fontello to consolidate multiple icons into a single font file, reducing the number of network requests required to render the UI.
Pricing of Fontello
Fontello is a free, open-source project. The software is provided under the MIT license, allowing for free use in both personal and commercial projects.
