How the free online font converter works
TTF and OTF are the fonts you install on a computer. WOFF is the same font with each table compressed for the web, so pages download it faster. Converting a desktop font to WOFF prepares it for a website; converting a WOFF back to TTF or OTF restores the original font file so it can be installed.
Between TTF, OTF and WOFF nothing is redrawn: the outlines, kerning, hinting and OpenType features are copied exactly by a few lines of code on this page, so it is instant and nothing is uploaded. WOFF2, EOT and SVG fonts, and conversions that change the outline type, such as TTF to OTF, need FontForge and Google's woff2 tools, so they run on our conversion server and the font is deleted as soon as the result is sent back.
Which font format should you use?
Use TTF or OTF to install a font on a computer: both work on Windows, Mac and Linux. OTF usually holds PostScript-style outlines and advanced typographic features; TTF holds TrueType outlines. For everyday use, the difference is invisible.
Use WOFF2 to put a font on a website: it is the smallest web font format and every current browser supports it through the CSS @font-face rule. WOFF is its older, slightly larger sibling, and EOT only matters for old Internet Explorer. None of the three can be installed on a computer.
Converting between packagings never changes the design: the glyph outlines, spacing, kerning and features are carried over. Only a change between TrueType and PostScript outlines, such as TTF to OTF, redraws the curves, with no visible difference, though hinting can change at small sizes.
Common font conversions and why people need them
The typical job is putting a brand or licensed font on a website. Designers receive TTF or OTF files, and the web developer needs WOFF for the CSS @font-face rule, which makes each file noticeably smaller and quicker to load. Converting here takes a second per font and keeps every glyph, kerning pair and feature table.
The reverse happens too. A WOFF downloaded from a font service or found in a website project cannot be installed on a computer, and converting it back to TTF or OTF restores the installable font, provided its licence allows desktop use.
TTF, OTF and WOFF are converted by reading their tables directly in this tab, so nothing is sent to a server for those, which matters for unreleased brand fonts and paid licences. WOFF2, EOT and outline changes use FontForge and Google's woff2 tools on our server, where the font is deleted as soon as the result is sent back.
After converting, open the font in a browser page or install it and type a sample, including accented letters and numbers, to confirm the result before you ship it. Keep the original files as well, since they are the masters you will convert from again when you need another format.
Font formats compared
Tips for converting font files
- Check the licence: many desktop font licences do not allow web embedding.
- Keep the TTF or OTF original; WOFF and WOFF2 are for serving, not installing.
- For the smallest web font, serve WOFF2 and subset it to the characters your site uses.
- Font collections (.ttc) are not supported yet.
Is it safe to convert font files online?
Most conversions here run inside your browser: the page downloads the converter code, and your file is read and processed in the tab on your own device without being sent anywhere. A few formats, such as EOT and WOFF2, need desktop programs and are converted on our conversion server instead. The note under the drop zone says which applies to the format you choose.
When the server is used, the file is sent over an encrypted connection to a private temporary folder that only that conversion uses, converted with an open-source program, and deleted together with the result the moment the result has been sent back. Nothing is stored, and our logs never record file names or contents. Any folder left behind by a failed conversion is removed automatically within ten minutes.
Font Converter FAQ
Will the font look different after converting?
No. Between packagings every glyph, the spacing and the kerning are copied exactly. Between TrueType and PostScript outlines the curves are redrawn with no visible difference, though hinting can change at small sizes.
Can I install a WOFF font?
No. Operating systems do not install WOFF or WOFF2; convert them to TTF or OTF first.
Can I convert OTF to TTF?
Yes. OTF to TTF runs on our server with FontForge, which redraws the PostScript curves as TrueType curves. The shapes match; hinting written for the original may change.
Is WOFF2 supported?
Yes. WOFF2 conversions run on our server with Google's woff2 tools and FontForge, and the font is deleted as soon as the result is sent back.
Is the font converter free?
Yes, with no sign-up and no watermark. Conversions in your browser have no limit on the number of files; conversions that use our server accept files up to 25 MB each, with a fair-use limit per hour so the service stays fast for everyone. The site is supported by advertising.
Does the font converter work on phones?
Yes. It works in Safari on iPhone and iPad and in Chrome on Android. Converted files are saved to your Downloads folder.