Difference Between TTF and OTF

TTF and OTF are two font file types that are widely used in digital typography. TTF is an abbreviation for TrueType Font, while OTF is an abbreviation for OpenType Font. Both of these file formats are used to store font information and to allow the usage of certain typographic characteristics, although they differ significantly.

Read this article to find out more about TTF and OTF and how they are different from each other.

What is TTF?

TTF can mean a variety of things depending on the context, but the most common is "TrueType font." TrueType is a digital font system developed in the late 1980s by Apple and Microsoft that uses a mathematical formula to produce fonts on computer screens and printers.

  • TTF fonts consist of a collection of glyph shapes, or individual character designs, as well as metadata describing how the font should be rendered. This metadata contains details like font size, line spacing, and kerning, which is the modification of space between characters to improve readability.

  • TTF fonts have the advantage of remaining relatively simple and easy to develop. They use a basic compression mechanism that minimises file size while maintaining high quality. TTF fonts also support smooth scaling, which means they can be scaled up or down without losing quality.

  • TTF fonts often contain a limited set of typographic capabilities, such as bold and italic styles, but may not support more complex features like ligatures or alternate glyphs. Some TTF fonts might include additional features that are particular to specific software applications, such as Microsoft Office.

Overall, TTF fonts are a popular font type that offers basic typographic features and is simple to create and scale. However, due to its increased flexibility and support for advanced features, the OpenType Font (OTF) format may be more appropriate for more complex typographic needs.

What is OTF?

OpenType fonts (OTF) support Unicode, which means they can include characters from a variety of languages and scripts. This property makes them especially helpful for creating bilingual texts and applications. OpenType fonts also allow advanced typography features like ligatures, swashes, alternate characters, and more, which can improve text design.

  • OpenType fonts are scalable and may be resized without losing quality. They use vector images to render fonts, making them more flexible than conventional font formats. OpenType fonts also support both PostScript and TrueType outlines, allowing them to be used on a variety of devices and applications.

  • OpenType fonts, like TrueType fonts, are scalable and may be enlarged without losing quality. They also produce fonts using vector images, making them more flexible than conventional font formats.

  • OpenType fonts can include over 65,000 glyphs, making them excellent for developing complex typographic designs. They can also support many languages and writing systems, making them an important tool for creating documents and applications that require multilingual support.

Overall, OTF is a font format with extensive typography features, Unicode support, and compatibility with many operating systems and software programmes. Because of its adaptability and flexibility, it is frequently utilised in a variety of fields, including graphic design, web design, and publishing.

Difference between TTF and OTF Fonts

The following table highlights the major differences between TTF and OTF fonts −




Typography Support

It supports typography features such as bold, italic, and underline.

It supports advanced typography features such as ligatures, alternate glyphs, and small caps.

Stands for

TrueType fonts (TTF)

OpenType fonts (OTF)


It is compatible with Windows, Mac, and Linux operating systems.

It is compatible with both Mac and Windows operating systems.

Language Support

It supports a limited range of languages and characters.

It supports a wider range of languages and characters that include non-latin scripts like Arabic and Chinese.


TTF is more popular than OTF.

OTF is less popular compared to TTF.

Browser Support

It supports only old browsers.

It supports old and new browsers.


Low Cost

High Cost

File Size

smaller in size compared to OTF

larger file size compared to TTF


In conclusion, while TTF and OTF are both font file formats widely used in digital typography, there are some significant differences between them.

OTF is more advanced than TTF in terms of typographic features, compression methods, flexibility, and extensibility. TTF fonts are still extensively used and are suitable for basic typographic demands.

Finally, the choice between TTF and OTF will be made according to the project's specific requirements, and it is important to examine the level of typographic features necessary as well as file size constraints.

Updated on: 17-Apr-2023


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