Font Format Converter

Convert fonts between TTF, OTF, and WOFF formats right in your browser. No upload to any server, no file size limits, no sign-up required. Drag and drop your font file, pick the output format, preview the typeface with custom text, and download the converted file instantly. Ideal for web developers preparing web fonts, designers converting typefaces between platforms, or anyone who needs a font in a different format.

What is the difference between TTF, OTF, and WOFF?

TTF (TrueType Font) was co-developed by Apple and Microsoft in the late 1980s. It uses quadratic B-spline curves for glyph outlines and is supported by every major operating system and browser. OTF (OpenType Font) extends TrueType with support for advanced typographic features like ligatures, swashes, and contextual alternates. OTF files can use either TrueType or CFF (Compact Font Format) outlines. WOFF (Web Open Font Format) is a compressed wrapper around TTF or OTF data, designed specifically for web delivery. WOFF files are typically 30-40% smaller than the equivalent TTF or OTF, which means faster page loads. All three formats are widely supported — but each is optimized for a different use case.

When should I use TTF vs OTF vs WOFF?

Use TTF when you need maximum cross-platform compatibility — desktop applications, mobile apps, older operating systems, and legacy software all handle TTF reliably. Use OTF when your design requires advanced OpenType features or when working with professional typesetting tools like Adobe InDesign or Illustrator. Use WOFF for web deployment — the compression reduces bandwidth usage significantly, and every modern browser supports WOFF. If you are building a website, converting your TTF or OTF to WOFF before adding it to your CSS @font-face rule is a best practice that improves Core Web Vitals scores.

How do I optimize web fonts for faster page loading?

Start by converting your desktop font (TTF or OTF) to WOFF format — the compression alone saves 30-40% of file size. Next, subset the font to include only the character sets you actually use (Latin, for example, instead of all Unicode blocks). Add font-display: swap to your @font-face CSS rule so text renders immediately with a system fallback while the custom font loads. Use <link rel="preload" as="font" type="font/woff" crossorigin> to start downloading the font file early. Finally, limit the number of weights and styles you load — every variant is a separate file. These optimizations can reduce font-related loading time by 50-80%.