Convert OTF to WOFF2
Turn your OTF into a WOFF2. OTF is a font file with more room in it: extra characters, alternate letter shapes, proper ligatures and support for languages that need letters to join up. Your file never leaves your computer.
Need the other direction? Convert WOFF2 to OTF
How to convert OTF to WOFF2
- 1 Drop your OTF .otf file onto the page, or click to browse for it.
- 2 Check the options. Nothing is thrown away on the way to WOFF2, so there is no quality dial to set.
- 3 Convert. The work happens on your own machine, so how long it takes depends on your computer and the file.
- 4 Download the WOFF2, or add more files and do the whole set in one go.
Why convert OTF to WOFF2
- The smallest widely supported font format, around half the size of TTF.
- Supported by every browser in current use, so no fallback is needed.
- Subsetted fonts cut down to the characters a page actually uses.
- OTF: many applications expose only a fraction of its layout features.
OTF compared with WOFF2
How the two formats differ on the things that decide whether a conversion is worth making.
| Property | OTF | WOFF2 |
|---|---|---|
| File extension | .otf | .woff2 |
| Compression | Uncompressed | Lossless |
| Colour depth | CFF cubic or TrueType quadratic outlines, GSUB and GPOS layout tables | Brotli compression with a transformed glyf table |
| Typical file size | Largest | Larger |
| Introduced | 1996 | 2018 |
| Developed by | Microsoft and Adobe | Google, standardised by W3C |
Quality and what changes
Both sides are lossless, so every pixel survives the trip intact and converting back returns the same image. What changes is the size and what the file can carry: WOFF2 compresses the same data with a different algorithm, so the size can move in either direction.
- One WOFF2 limitation to keep in mind: operating systems will not install it as a desktop font.
Questions about OTF to WOFF2
Is my OTF file uploaded anywhere?
No. The whole thing runs inside the browser tab you already have open. Your OTF is read straight from your own disk, converted on your machine and handed back as a WOFF2. Nothing is sent anywhere, nothing is stored and there is no account.
Is there a file size limit?
There is no server-side limit because no server sees the file. The real ceiling is your device memory, since the input and the output both have to fit in the tab. A few hundred megabytes is usually fine on a desktop machine and considerably less on a phone.
Can I convert several OTF files at once?
Yes. Add as many as you like and they are processed one after another, then offered as separate WOFF2 downloads or as a single ZIP. Speed depends on your own processor rather than on a queue.
Does the converter work offline?
Yes, after the page has loaded once. The engine is cached by the browser, so you can disconnect, reload and keep converting. That falls out of doing the work locally rather than being a separate mode you switch on.