What is a .OTF file?
OTF is the OpenType font format, a richer successor to TrueType.
- Did you know
- OpenType was created jointly by Microsoft and Adobe in 1996.
- On the web a .OTF file is served with the MIME type
font/otf. - Analyser spots a .OTF file by its signature bytes
4F 54 54 4F- ASCII for "OTTO".
- What Analyser shows you
- Preview fonts live in the browser and inspect them: the native FontFace API renders a real specimen (pangram, alphabet and sizes) of TrueType (TTF), OpenType (OTF), web fonts (WOFF, WOFF2) and collections (TTC), with sliders that drive each variable-font axis in real time. opentype.js reads the family, style, version, foundry, licence and units-per-em, counts the glyphs, and draws a grid of every glyph outline.
- Open a .OTF file
- Drag a .OTF file onto the Analyser home page (or tap to pick one). It opens entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.
- Related formats
- .TTF · .WOFF · .WOFF2 · .TTC. See all supported file types.