What happens when you convert OTF to WOFF2
- Google's woff2 tools, the reference WOFF2 encoder, pack the OTF into a WOFF2 on our conversion server.
- WOFF2 restructures the glyph data and compresses the whole font with Brotli, so it is usually about 30 percent smaller than WOFF and far smaller than the original font. The outlines, kerning, hinting and OpenType features are unchanged.
- WOFF2 is for websites: load it with @font-face in CSS. It cannot be installed on a computer, so keep the original font for that.
- This conversion runs on our server: the file is uploaded, converted, and deleted together with the result as soon as the result has been sent back to you. Nothing is kept. Files up to 25 MB are accepted.
How to convert OTF to WOFF2 online
- Press "Choose OTF files" and select one or more files, or drag them onto the box. Files up to 25 MB each can be converted.
- There are no settings to choose: the converter keeps everything the target format can hold.
- Press "Convert to WOFF2". The file is uploaded to our conversion server, converted in a few seconds, and deleted together with the result as soon as the result is sent back.
- Save each WOFF2 with its download button. Our server has already deleted both your OTF and the WOFF2 by then.
Why convert OTF to WOFF2?
OTF files usually come from professional typography, ligatures and design work. People convert them to WOFF2 because WOFF2 is the smallest web font format and every current browser loads it.
In short, OTF is good at what it was made for, and WOFF2 is the more practical choice when the file has to open, upload or print somewhere else. OTF installs on Windows, Mac and Linux; browsers load it through CSS, while WOFF2 loads in every current browser through CSS; cannot be installed on a computer.
How to convert OTF to WOFF2 on Windows, Mac, iPhone and Android
On Windows
Open this page in Chrome, Edge or Firefox, drag your OTF files in from File Explorer, and press Convert. Each WOFF2 is saved to your Downloads folder.
On a Mac
Safari, Chrome and Firefox all work. Drag the OTF files from Finder onto the drop zone and the WOFF2 files land in Downloads.
On iPhone and iPad
Open the page in Safari and tap Choose OTF files. You can pick from Photos or from the Files app. The converted WOFF2 appears in Files, in the Downloads folder.
On Android
Open the page in Chrome, tap Choose OTF files and pick them from Files or your gallery. The WOFF2 is saved to the Download folder, where any file manager can find it.
Best settings for OTF to WOFF2
There are no settings: the whole font is compressed at the encoder's highest setting.
Serve the WOFF2 first in your @font-face rule, with WOFF as a fallback only if you still support very old browsers.
OTF vs WOFF2: the differences
| OTF | WOFF2 | |
|---|---|---|
| Full name | OpenType font | Web Open Font Format 2 |
| Type | font | font |
| Created by | Microsoft and Adobe | the World Wide Web Consortium |
| First released | 1996 | 2014 |
| Compression | Lossless | Lossless |
| What it holds | glyph outlines, usually cubic PostScript curves, plus typographic features | the tables of a TrueType or OpenType font, compressed with Brotli |
| In a browser | installs on Windows, Mac and Linux; browsers load it through CSS | loads in every current browser through CSS; cannot be installed on a computer |
| Common uses | professional typography, ligatures and design work | fonts served by modern websites |
| MIME type | font/otf | font/woff2 |
About OTF and WOFF2 files
What is an OTF file?
OpenType extends TrueType with advanced typography such as ligatures and alternate glyphs. An .otf file usually holds PostScript-style cubic outlines rather than TrueType curves.
What is a WOFF2 file?
WOFF2 compresses a font with Brotli and restructures its glyph data first, so it usually comes out around 30 percent smaller than WOFF. Every current browser supports it, which makes it the format to serve on the web today.
OTF to WOFF2 not working? Common problems
- "Files up to 25 MB can be converted." Server conversions have a size limit. A font that large usually holds several scripts; subset it to the characters you need first.
- "The conversion took too long and was stopped." Very long or complex files can pass the 90 second limit. Split the file and convert the parts.
- "This file is not really in OTF format." The converter checks every file before it runs anything, so a file of another format renamed to .otf is refused. Choose the page for its real format.
Convert OTF to WOFF2 from the command line
Google's woff2 tools do the same on your own computer:
woff2_compress input.otfConverting on your own computer keeps the file entirely local, which is worth it for very large or very sensitive documents. For everything else, the converter on this page does it without installing anything.
OTF to WOFF2 converter FAQ
Will I lose quality converting OTF to WOFF2?
No. WOFF2 compression is lossless: every glyph, kerning pair and feature comes back exactly when a browser unpacks it.
Why is the WOFF2 a different size from the OTF?
Much smaller than the OTF, typically 30 percent smaller than WOFF and about half the size of the TTF or OTF inside.
Are my OTF files uploaded?
Yes, for this conversion. A faithful OTF to WOFF2 conversion needs Google's woff2 tools, which cannot run in a browser. The file travels over an encrypted connection, is converted in a private temporary folder, and is deleted together with the WOFF2 as soon as the result has been sent back to you. We do not keep, read or share it.
Can I convert several OTF files to WOFF2 at once?
Yes. Select or drop as many files as you like; they are converted one after another and each gets its own download button.
How do I open a WOFF2 file?
WOFF2 loads in every current browser through CSS; cannot be installed on a computer. WOFF2 is common for fonts served by modern websites.
Is this OTF to WOFF2 converter free?
Yes. There is no sign-up and no watermark. Because this conversion uses our server, there is a fair-use limit of 25 MB per file and a number of files per hour, which stops the service being overloaded.
Can I convert OTF to WOFF2 on my phone?
Yes. It works in Safari on iPhone and iPad and in Chrome on Android. The conversion happens on our server, so it is as fast on a phone as on a computer; the WOFF2 is saved to your Downloads folder.