What is the difference between WOFF and WOFF2?

WOFF is a web font format: a TrueType or OpenType font wrapped in zlib compression for delivery over HTTP. It was the web standard before WOFF2 and is now mainly a fallback for older browsers. WOFF2 is the current web font format, compressing a TrueType or OpenType font with Brotli plus a font-specific pre-transform. It is about 30% smaller than WOFF and half the size of raw TTF, and every current browser supports it.

Anything to watch out for with WOFF2?

The compression is lossless. Converting TTF to WOFF2 and back returns the original font. Subsetting a font before converting saves far more than the compression does — a Latin-only subset of a large family is often a tenth of the full file.

Does converting a font affect how it renders?

No. All four formats here are containers around the same glyph outlines and OpenType tables, and the conversions are lossless — text renders identically before and after. What changes is file size and where the file can be used: browsers want WOFF2, operating systems want TTF or OTF.

Am I allowed to convert this font?

That depends on the font's licence, not on the tool. Many commercial licences permit desktop use but restrict web embedding, or the reverse. Converting the file does not change what the licence allows — check it before deploying a converted font to a website.

What should I know about starting from WOFF?

WOFF is a zlib-wrapped SFNT from the pre-2018 web. The wrapper is lossless, so the original font comes back out unchanged. More broadly: WOFF is an SFNT font wrapped in zlib compression plus a metadata block, designed specifically for web delivery. It was the web font standard from roughly 2012 until WOFF2 replaced it.

When is WOFF2 the right choice?

WOFF2 suits: web font delivery — this is the default choice; cutting page weight without touching rendering quality. It is the wrong choice when desktop installation; operating systems will not install a WOFF2.

Is there a file size limit?

No hard limit — the constraint is your browser's memory. Files under 50MB convert in a few seconds. Larger files work but take longer, and a browser tab typically has 250-500MB to play with, so very large batches are better split into smaller groups.

Does this work on mobile?

Yes. The drop zone falls back to your phone's file picker, and the conversion runs on-device exactly as it does on desktop. Large files are slower on a phone because there is less CPU and memory available, but nothing about the workflow changes.

Convert WOFF to WOFF2

Convert WOFF to WOFF2 and cut the file roughly in half — the web font format every current browser supports. Free, in your browser, no upload.

Drop font files to convert

TTF, OTF, WOFF, WOFF2

Files stay on your device. Open DevTools' Network tab to verify.

Overview

Why convert WOFF to WOFF2

Serving WOFF over the web sends far more bytes than necessary. WOFF2 renders identically and is roughly half the size of raw TTF, and every browser in current use supports it — there is no compatibility argument left for shipping anything else. WOFF is a zlib-wrapped SFNT from the pre-2018 web. The wrapper is lossless, so the original font comes back out unchanged.

Comparison

WOFF vs WOFF2: what actually differs

WOFF compared with WOFF2 across encoding, fidelity, file size and support.
Attribute	WOFF	WOFF2
Full name	Web Open Font Format	Web Open Font Format 2
Encoding	Binary	Binary
What it preserves	Lossless — the original font is recoverable byte-for-byte	Lossless — the original font is recoverable byte-for-byte
Typical size	Roughly 40% smaller than the equivalent TTF	Smallest of the four — roughly half the equivalent TTF
Support	Every browser since IE9. Not installable as a desktop font.	Every browser since 2018 (Chrome 36, Firefox 39, Safari 12, Edge 14).

How to

How to convert WOFF to WOFF2

01
Drop your WOFF file
Drag one or more WOFF files onto the drop zone above, or click to browse. Files stay on your device — there is no upload step.
02
Convert to WOFF2
convert.now parses the WOFF and writes it out as WOFF2 in a Web Worker, so the page stays responsive even on large files. Nothing is sent anywhere.
03
Download the result
Download the WOFF2 file, or a zip of all of them for a batch. Filenames are preserved, with the extension changed to .woff2.

Why here

Why convert.now

Private
Files stay in your browser. No upload step. Nothing for anyone to see.
Fast
No queue, no upload wait. Conversion starts the moment you drop a file.
Free
No ads. No file-count limit. No sign-up wall. Just the converter.

FAQ

WOFF to WOFF2: common questions

No. The WOFF to WOFF2 conversion runs entirely in your browser. Files never leave your device, and there is no server involved in the conversion at all. Open DevTools' Network tab and run a conversion if you want to confirm it — you will see the page and its code load, and no request carrying your file.

Related WOFF converters

Last updated 27 August 2026

Why convert WOFF to WOFF2

WOFF vs WOFF2: what actually differs

How to convert WOFF to WOFF2

Drop your WOFF file

Convert to WOFF2

Download the result

Why convert.now

WOFF to WOFF2: common questions

Related WOFF converters