How to preview a .OTF file online
See your .OTF file in action before you install it, license it or send it to a client.
Pick your .OTF file
Drag it in or click to choose it, or try one of the samples below. Nothing is installed or uploaded from your device.
Type and test
Write your own text, change the size, switch OpenType features like ligatures and small caps, and move variable-font sliders.
Inspect and use
Browse every glyph with its outline, check language coverage, read the licence and copy ready-made @font-face CSS.
About .OTF files
What a .OTF file is, and what's inside it.
An OTF file is an OpenType font, a scalable vector typeface you install so apps can use it. On Windows double-click and click Install; on macOS double-click and click Install Font in Font Book; on Linux copy to ~/.local/share/fonts and run fc-cache -f. For websites, convert OTF to WOFF2 first.
Programs that open .OTF files
| Full name | OpenType Font |
|---|---|
| Developer | Microsoft and Adobe (jointly, mid-1990s, building on Apple's TrueType sfnt) |
| First released | 1996 (announced by Microsoft and Adobe); first fonts shipped 2000-2001 |
| Category | Fonts |
| MIME type | font/otf |
| Signature | 4F 54 54 4F 'OTTO' = OpenType with CFF (PostScript) outlines |
Related viewers
Other free viewers that work the same way.
Does opening a .OTF file install it on my computer?
No. The font is loaded only inside this browser tab and disappears when you close it. Nothing is installed or uploaded.
How do I know which languages a font supports?
Open the Languages tab. We check the font's character map against the letters each language needs, for example ą ć ę ł ń ó ś ź ż for Polish, and show what's missing.
What are OpenType features?
Optional typographic extras built into a font: ligatures, small caps, old-style or tabular figures, fractions, stylistic sets. Switch them on and off in the Type tester to see what your font offers.
Can I use this font on my website?
Technically yes. Copy the @font-face CSS from the side panel. Legally, check the licence shown in the font info: many fonts are free (SIL Open Font License), others need a web licence.
Why does my Type 1 font look like an image?
Browsers can't use Type 1 fonts, so we render a specimen with Ghostscript instead. You can still type your own sample text and zoom in.
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