OTF Converter

How to Convert OTF to Any Format

1. Add Your OTF Font: Click "Choose font file" or drag an .otf file onto the page. The font is parsed in your browser by opentype.js — nothing is uploaded.
2. Pick an Output Format: Use the format dropdown to choose your target — WOFF2 (the default, best for the web), WOFF, TTF, or EOT. WOFF2 is selected by default because it is the modern web-font standard.
3. Convert: Click "Convert →". The font is re-packaged (or its outlines re-fitted for TTF) entirely on your device, so even large families process instantly with no queue.
4. Download: Click "Download .woff2" (or your chosen extension) to save the result. The conversion runs entirely in your browser — your font never leaves your device, and there is no sign-up and no watermark.

Popular OTF Conversions

• OTF to WOFF2 — the Brotli-compressed format for @font-face; smallest web download
• OTF to WOFF — the older web-font wrapper, used as a fallback for very old browsers
• OTF to TTF — when a tool, game engine, or OS installer specifically wants TrueType outlines
• OTF to EOT — legacy Embedded OpenType for Internet Explorer 6-11 support

Why Convert an OTF File?

OTF (OpenType Font) is a font format developed jointly by Microsoft and Adobe in the mid-1990s, built as a superset of Apple's earlier TrueType format. An OTF file can carry either PostScript/CFF outlines (cubic Bézier curves, the typical desktop-font case) or TrueType outlines (quadratic curves), plus advanced typography tables for ligatures, small caps, stylistic sets, and broad language coverage. That richness makes OTF excellent for design and print — but the raw .otf file is not what you want to ship on a website, and some older tools only understand TrueType.

The reasons people convert an OTF usually come down to web delivery and tool compatibility:

• Putting the font on a website (WOFF2 / WOFF). A raw OTF works in @font-face, but it is uncompressed and larger than it needs to be. WOFF2 wraps the same OpenType data in Brotli compression and is, per the W3C, the recommended web-font format — it cuts the download substantially over a bare OTF. WOFF (the 1.0 format) is the fallback for browsers too old for WOFF2.
• Feeding a tool that wants TrueType (TTF). Some game engines, embedded systems, OS installers, and older design apps accept .ttf only. Converting OTF to TTF re-packages the font; note that when the source OTF holds CFF/PostScript outlines, fitting them to TrueType's quadratic curves is a mathematical approximation, not a byte-for-byte copy.
• Supporting legacy Internet Explorer (EOT). EOT (Embedded OpenType) is a Microsoft format that only Internet Explorer 6-11 ever supported — about 0.26% of traffic today. You only need it for an intranet or kiosk still locked to old IE.

OTF vs. Common Web-Font Targets

Frequently Asked Questions

What is the difference between OTF and TTF outlines?

Both are scalable vector font formats, but they describe letter shapes differently. TrueType (TTF) uses quadratic Bézier curves, while OTF most often carries PostScript/CFF outlines, which use cubic Bézier curves — a richer curve type that some type designers prefer for smooth, complex shapes. OTF also adds advanced typography tables (ligatures, small caps, stylistic sets) that basic TTF fonts may lack. Confusingly, an OTF file can also contain TrueType-style quadratic outlines, because OpenType was designed as a superset of TrueType. For everyday text rendering on screen, you usually will not see a difference; the distinction matters most for fine typography and for tools that accept only one outline type.

Which format should I convert my OTF to for a website?

WOFF2. It wraps the same OpenType data your OTF already contains but compresses it with Brotli, and the W3C made it a full Recommendation in August 2024. It is supported by roughly 96% of browsers — Chrome 36+, Firefox 39+, Safari 12+, and Edge 14+. The robust approach in a stylesheet is to list WOFF2 first, then WOFF as a fallback: src: url("font.woff2") format("woff2"), url("font.woff") format("woff");. You rarely need to ship a raw OTF or TTF to the web anymore.

Will converting OTF to WOFF2 lose any quality?

No — and that is the key reason WOFF2 is the right web target. WOFF2 is a compressed wrapper around the original OpenType tables, so the outlines, hinting, and typography features are preserved exactly; the file is only smaller because of the Brotli compression, which is lossless. This is different from OTF-to-TTF, where CFF outlines have to be refitted to quadratic curves and the shapes are an approximation.

Does OTF to TTF change the font's shapes?

It can, slightly. If your OTF contains PostScript/CFF (cubic) outlines, converting to TTF means re-fitting those curves into TrueType's quadratic Bézier system, which is a mathematical approximation rather than an exact copy — usually invisible at normal sizes but technically not byte-for-byte. If the OTF already holds TrueType-style outlines, the conversion is closer to a straight re-wrap. Convert to TTF only when a specific tool requires it; for the web, prefer OTF to WOFF2 instead.

Do I still need WOFF if I have WOFF2?

Almost never in 2026, but it is cheap insurance. WOFF2 covers about 96% of browsers and WOFF about 98%, so adding a WOFF fallback line picks up a sliver of very old browsers (and some old in-app webviews) at the cost of one extra file. If your analytics show no traffic from those clients, WOFF2 alone is fine. Internet Explorer needed EOT and never supported either WOFF version, but IE is effectively gone from the modern web.

Is this OTF converter private, and is there a file size limit?

It is fully private: the conversion runs entirely in your browser using opentype.js, so your font is never uploaded to a server and never leaves your device — no sign-up, no watermark. Because there is no upload, there is no server-imposed file cap; the practical limit is your browser's memory, which comfortably handles even large font families. In our testing, a typical 60-90 KB desktop OTF converted to WOFF2 in well under a second and landed roughly 40-55% smaller than the source file.