Made Good Designs

OTF to WOFF Converter

Convert a .otf (OpenType) font into the .woff web format so you can serve it with @font-face and reach even very old browsers. WOFF is the original web-font wrapper with the widest legacy support; the newer WOFF2 is around 30% smaller, so most sites offer both. Everything runs entirely in your browser, so your font is never uploaded and there is no signup or software to install.

100% private — runs in your browser

Converts fonts locally with WOFF2 compression for the web. Web-font kit includes a .woff2 file and ready-to-paste @font-face CSS.

How to convert OTF to WOFF

  1. Drop your .otf file onto the converter, or click to select it from your device.
  2. Set the Output dropdown to WOFF (web, legacy) so the tool produces a .woff file.
  3. Pick a font-display option (swap is a safe default) to control how text shows while the font loads.
  4. Click Convert & download to save your new .woff file.
  5. Click Copy CSS to grab a ready-made @font-face rule for your stylesheet.

The whole process happens locally in your browser. Your font is never uploaded to a server, so it stays completely private.

Why convert OTF to WOFF?

  • Built for the web: WOFF is a compressed web wrapper made for delivering fonts over @font-face, unlike a raw desktop OTF.
  • Widest legacy support: WOFF works in modern browsers and reaches back to older IE, Safari and Android versions that predate WOFF2.
  • Smaller than raw OTF: WOFF applies zlib compression, so the file downloads faster than an uncompressed OpenType font.
  • Lossless: the conversion only rewraps and compresses the font. Your OpenType CFF (PostScript) outlines are preserved exactly, and features like ligatures and alternates are retained.

WOFF vs WOFF2: which should you use?

Both are web wrappers around the same font data. WOFF2 uses Brotli compression and is roughly 30% smaller, so it is the preferred format for modern sites. WOFF uses older zlib compression and is slightly larger, but it has wider support on legacy browsers. The best-practice pattern is to offer both: list WOFF2 first and let older clients fall back to WOFF. Serve WOFF on its own only when you specifically need to support very old browsers.

 WOFFWOFF2
Compressionzlib (older)Brotli (~30% smaller)
Best forLegacy browser fallbackPrimary modern web font
Browser supportWidest, incl. old IE / Safari / AndroidAll current browsers
RecommendationOffer as a fallbackList first

Using your WOFF font on a website

Reference your fonts with an @font-face rule. List WOFF2 first with a format() hint so capable browsers pick the smaller file, then WOFF as the fallback for older clients:

@font-face {
  font-family: "My Font";
  src: url("/fonts/my-font.woff2") format("woff2"),
       url("/fonts/my-font.woff") format("woff");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

body {
  font-family: "My Font", sans-serif;
}

Upload both files to your server, adjust the url() paths and font-family name, and the Copy CSS button gives you a starting rule automatically. font-display: swap keeps text visible with a fallback face while the custom font loads.

Related tools

  • OTF to WOFF2 — convert an OTF font to compressed WOFF2 for fast-loading websites

Frequently asked questions

Is OTF to WOFF lossless?

Yes. The tool only rewraps and compresses the font for web delivery. The original CFF (PostScript) or TrueType outlines are preserved inside the WOFF wrapper, so the letterforms are identical to the source OTF.

Will OpenType features (ligatures) still work?

Yes. OpenType feature data such as ligatures, alternates and small caps is retained in the font, so those features keep working wherever your CSS or browser enables them.

Should I use WOFF or WOFF2?

WOFF2 is preferred because it is around 30% smaller. Use WOFF when you need to support very old browsers that lack WOFF2. The safest approach is to offer both, listing WOFF2 first and WOFF as a fallback.

Is it free and private?

Yes. The converter is free and runs entirely client-side in your browser. Your font file is never uploaded and there is no signup.

Do modern browsers still support WOFF?

Yes. Every current browser supports WOFF, and its reach extends further back than WOFF2. That makes it a reliable fallback, even though WOFF2 is the better primary choice for most sites today.

What if I need WOFF2, a TTF, or a full web-font kit instead?

Use the Output dropdown to switch to WOFF2 (web), TTF / OTF for a desktop file, or Web-font kit (ZIP) to download the font in multiple formats bundled with its @font-face CSS.

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