Convert OTF to WOFF Online
Free, private OTF to WOFF converter. Your files never leave your browser. All processing happens locally on your device.
Drag & drop files here
images, PDFs, documents, audio, video, and more
No Server Uploads
FormatShift converts files directly in your browser. Your files never leave your device, so there's nothing to intercept or leak.
Instant Export
Files convert on your machine, so downloads are ready right away, even on slow connections.
High Fidelity
Good encoding keeps your files looking and sounding right, even at smaller sizes.
Built for Privacy
Your files are processed entirely in your browser. They never leave your device.
How to convert OTF to WOFF
Drop your OTF file
Drag your file onto the converter above, or click to browse your files. Your files stay on your device.
Automatic conversion
FormatShift converts your file right in your browser using WebAssembly. No server involved, so your data stays completely private.
Download your WOFF file
Once the conversion finishes, click the download button and you are done. The converted file is ready to use.
Why convert OTF to WOFF?
OTF and WOFF serve different purposes. Converting between them lets you use whichever format works best for your situation.
What is a OTF file?
OpenType Font: OTF is the modern font format that extends TTF with additional typographic features. Professional fonts often ship as OTF because it supports ligatures, stylistic alternates, and other advanced layout features.
Created by: Microsoft and Adobe, first released in 1996
Used for: Professional typography, design work, documents with advanced typographic features
Technical details: Can contain TrueType or CFF (PostScript) outlines. Supports OpenType layout features like ligatures, small caps, and contextual alternates.
Compatibility: Supported by all modern operating systems and design tools. Some older applications may not support all OpenType features.
What is a WOFF file?
Web Open Font Format: WOFF is a compressed font format designed specifically for web pages. It's essentially a TTF or OTF font wrapped in compression, making it faster to download while keeping the same quality.
Created by: Mozilla, Opera, and Microsoft, standardized in 2012
Used for: Web fonts, CSS @font-face declarations
Technical details: Compressed wrapper around TTF or OTF data using zlib. Typically 30-40% smaller than the equivalent TTF. Includes metadata for licensing information.
Compatibility: Supported by all modern browsers. Not typically used for desktop font installation.
OTF vs WOFF
| Feature | OTF | WOFF |
|---|---|---|
| Type | OpenType Font | Web Open Font Format |
| Best for | Professional typography, design work, documents with advanced typographic features | Web fonts, CSS @font-face declarations |
| Compatibility | Supported by all modern operating systems and design tools. Some older applications may not support all OpenType features. | Supported by all modern browsers. Not typically used for desktop font installation. |
| Pros | Advanced typographic features, cross-platform, compact CFF outlines | Smaller than TTF/OTF for web delivery, fast loading, universal browser support |
| Cons | Some features only work in applications that support OpenType layout | Only useful for web, replaced by the more efficient WOFF2 |