Are my OTF files uploaded anywhere?

Yes — this conversion needs software that cannot run in a browser, so the file is uploaded over an encrypted connection. It is deleted as soon as the job finishes, and the result is removed after 60 minutes.

Is converting OTF to WOFF free?

Yes, up to 100 conversions a day for files up to 25 MB. That one limit exists because this conversion runs on a server we pay for; nothing else here is metered, and there is no watermark either way.

Does converting OTF to WOFF lose quality?

No. WOFF stores the same content without discarding anything, so the result is identical in quality to the original. The outlines decide what an unwrapped font is: a WOFF holding PostScript curves becomes an OTF, one holding TrueType curves becomes a TTF. Asking for the other is refused rather than answered with a mislabelled file.

Do I need to install anything to open WOFF files?

No. The conversion runs on our side and gives you a finished WOFF file; opening it needs whatever software normally handles Web Open Font Format.

OTFtoWOFF

Convert OTF to WOFF

Up to 100 files at once. Mixed formats are fine.

You can convert OTF to WOFF free and without an account: drop the file above and the WOFF is ready to download in a second or two. The file is sent over an encrypted connection, converted on our server and deleted as soon as the job finishes.

What OTF and WOFF are for

TrueType with typographic extras — ligatures, alternates, proper small caps.

A font packed for the web. Superseded by WOFF2 but still needed for old browsers.

How to convert OTF to WOFF

Drop your OTF file onto this page, or click to pick one.
Choose WOFF as the target and start the conversion.
Download the finished WOFF file.

OTF vs WOFF: what changes

OTF compared with WOFF
	OTF	WOFF
Full name	OpenType Font	Web Open Font Format
File extension	.otf	.woff
Media type	font/otf	font/woff

Quality: Nothing is lost. The result holds exactly the same picture, text or data as the original.
Where it runs: This conversion runs on our server, because it needs software a browser cannot run.
What can be lost: The outlines decide what an unwrapped font is: a WOFF holding PostScript curves becomes an OTF, one holding TrueType curves becomes a TTF. Asking for the other is refused rather than answered with a mislabelled file.

OTF to WOFF: common questions

Are my OTF files uploaded anywhere?: Yes — this conversion needs software that cannot run in a browser, so the file is uploaded over an encrypted connection. It is deleted as soon as the job finishes, and the result is removed after 60 minutes.
Is converting OTF to WOFF free?: Yes, up to 100 conversions a day for files up to 25 MB. That one limit exists because this conversion runs on a server we pay for; nothing else here is metered, and there is no watermark either way.
Does converting OTF to WOFF lose quality?: No. WOFF stores the same content without discarding anything, so the result is identical in quality to the original. The outlines decide what an unwrapped font is: a WOFF holding PostScript curves becomes an OTF, one holding TrueType curves becomes a TTF. Asking for the other is refused rather than answered with a mislabelled file.
Do I need to install anything to open WOFF files?: No. The conversion runs on our side and gives you a finished WOFF file; opening it needs whatever software normally handles Web Open Font Format.