Font Converter

Font Converter repackages font files between the formats people actually need: TTF and OTF for installing on a computer, and WOFF and WOFF2 for websites. Drop in one font or a whole family, tick the formats you want, and download each file or a ZIP with a ready-made fonts.css.

It is careful rather than clever. Converting between these formats only changes the wrapping, not the letters, so the tables inside your font are copied exactly; a TTF turned into WOFF and back comes out byte for byte the same file. Every result is test-loaded in your browser before it is offered, and the page shows each font’s family, weight, glyph count, variable axes and the characters it covers.

Before you put a font on a website, check you are allowed to. The converter reads the font’s own embedding flag and licence text and warns you when the maker says “no embedding”. Everything runs on your device: your fonts are never uploaded, which matters for paid fonts you can’t share.

1. Press “Choose fonts” or drop TTF, OTF, WOFF or WOFF2 files onto the box. You can add a whole family at once.
2. Read each font’s card: its details, and the “Web use” line that tells you what its licence flags say.
3. Try it in “Preview”: type your own sample text, change the size, and move the sliders of a variable font.
4. Under “Convert to”, tick WOFF2, WOFF and/or TTF / OTF, and set the folder name and font-display for the CSS.
5. Press “Convert”, then download single files or “Download ZIP” (all fonts plus fonts.css), or copy the @font-face rules.

• TTF and OTF to WOFF2 and WOFF, and either web format back to TTF or OTF, in every current browser, Chrome and Edge included.
• WOFF2 packed with Brotli at its strongest setting, typically 8–15% smaller than WOFF, with a progress count for big fonts.
• Tables copied exactly: TTF → WOFF → TTF gives back the identical file, and WOFF2 made here keeps every table byte for byte.
• Reads compressed WOFF2 glyph data back into normal TrueType outlines, checked against a reference decoder.
• Font details: family, style, weight, width, glyph and character counts, scripts covered, variable axes, version, designer and licence text.
• Licence check from the font’s embedding flag (fsType) and licence name, with a clear warning for “Restricted” fonts.
• Live preview with your own text, sizes up to 140 px and a slider for every variable-font axis.
• Ready @font-face CSS with the right format names, weight ranges for variable fonts and your choice of font-display.
• Batch conversion of up to 40 fonts, with a ZIP holding a fonts folder and fonts.css.

• For a website, WOFF2 alone is enough today; add WOFF only if you need very old browsers. Keep the TTF or OTF for designers and desktop apps.
• Renaming .ttf to .woff doesn’t convert anything, and browsers will refuse the file. Converting rewrites the wrapper properly.
• This tool changes the format, not the outlines: an OTF with PostScript curves stays an OTF. Turning PostScript outlines into TrueType ones needs desktop font software.
• Convert all the weights of a family together: the CSS then lists each one with its own weight and style, under one family name.
• Huge fonts, such as full Chinese or Japanese sets, take a while as WOFF2 because of the strongest compression: allow about two seconds per megabyte on a laptop, more on a phone.