To convert OTF to WOFF, select or drop your .otf file above, check that WOFF is chosen as the output, and click Convert. This conversion runs on our server, and your files are deleted 72 hours later.
What is an OTF file?
OTF – OpenType font. OTF (OpenType) is the modern font format by Adobe and Microsoft: it holds PostScript or TrueType outlines and can add ligatures, small capitals and other typographic features. Every operating system installs it.
OTF Converter →What is a WOFF file?
WOFF – Web Open Font Format. WOFF (Web Open Font Format) is a TTF or OTF font compressed for web pages: smaller to download, and every browser loads it with @font-face. It is a web format; operating systems do not install it.
WOFF Converter →How to convert OTF to WOFF
- Click Select File, or drop your .otf files anywhere on this page. You can add several at once.
- Check that WOFF is chosen as the output format. On this page it is picked for you.
- Click Convert. When a file has to go to our server, the button says Upload and convert instead.
- Click Download next to each file when it's done.
OTF vs WOFF: how they compare
| OTF | WOFF | |
|---|---|---|
| Layout | Letter shapes (curves) | Letter shapes (curves) |
| Editable | In font editors | In font editors |
| Created by | Adobe and Microsoft, 1996 | Mozilla, Opera and Microsoft, 2009 |
| Best for | Fonts for print and design with extra typographic features | Fonts on web pages |
Good to know
- The font is converted by FontForge: the letter shapes, spacing and kerning are kept. Hinting (the instructions that sharpen small text) is made again or left out, which modern screens do not show.
- WOFF is for web pages: load it with @font-face in your style sheet. Operating systems do not install it.
- Check the font's licence before converting and using it: ConvertKitty does not look at what the licence allows.
Frequently asked questions
Is converting OTF to WOFF free?
Yes. Everyone gets 25 free credits a day, with no account needed. Conversions on our server use one credit per started minute of work, so most cost a single credit. Credits reset at midnight UTC.
Are my OTF files uploaded anywhere?
This conversion runs on our server, because converting fonts needs FontForge, which does not run in a browser. Your file is sent over an encrypted connection, and both it and the result are deleted 72 hours after the conversion. The server has no internet access while it works on your file.
How large can the OTF file be?
Up to 1 GB per file. This conversion runs on our server, which accepts files up to that size.
Will the WOFF look the same as the OTF?
Yes: the letter shapes, spacing and kerning are kept. Hinting, the instructions that sharpen small text on old screens, is made again or left out, and you will not see the difference on modern screens.
Can I convert several OTF files at once?
Yes. Add as many files as you like; they are converted one after another, and each one gets its own Download button.
How long does converting OTF to WOFF take?
In our tests even a font with 60,000 glyphs took between 1 and 9 seconds to convert; ordinary fonts finish in a moment.
Convert OTF to other formats
Convert other files to WOFF
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