Turn WOFF files into WOFF2
This makes a WOFF2 out of the WOFF you already have. WOFF2 is the usual choice for the primary @font-face source on any modern website. Your file never leaves your computer.
Need the other direction? Convert WOFF2 to WOFF
How to convert WOFF to WOFF2
- 1 Drop your WOFF .woff 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 WOFF 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.
- Self-hosted font packages such as the Fontsource npm distributions.
- WOFF: larger than WOFF2, which compresses the whole font in one pass.
WOFF compared with WOFF2
How the two formats differ on the things that decide whether a conversion is worth making.
| Property | WOFF | WOFF2 |
|---|---|---|
| File extension | .woff | .woff2 |
| Colour depth | Per-table zlib compression over a TrueType or OpenType payload | Brotli compression with a transformed glyf table |
| Introduced | 2009 | 2018 |
| Developed by | Mozilla, Type Supply and LettError, standardised by W3C | 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: takes longer to produce than a WOFF.
Questions about WOFF to WOFF2
Is my WOFF file uploaded anywhere?
No. The whole thing runs inside the browser tab you already have open. Your WOFF 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 WOFF 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.