OTF to SIX conversion is the process of transforming a font file in the OpenType (OTF) format into the SIX format, used by certain specialized applications or proprietary systems that require that container. This conversion repackages glyph outlines, metrics, and related font tables into the SIX target structure while preserving character mapping and typographic features where possible.
Related guides
Practical guides to help you choose formats, preserve quality, and avoid common conversion problems.
Drag your .OTF file from your computer or use the browse function.
Confirm .six as the selected destination format.
Click "Convert" and download your converted .SIX file once ready.
OTF files use the MIME type font/otf and are commonly used in desktop publishing and web typography. SIX files typically have a specialized MIME type that varies by platform and are designed to work with specific font rendering engines or software codecs. The conversion process ensures that font data is properly encoded for the SIX format while maintaining visual fidelity.
The SIX (.SIX) format is commonly used for other. Understanding its characteristics can be helpful when converting to or from other formats like OTF.
While specific technical details aren't available here, SIX files generally serve the purpose of storing other effectively within their domain.
Converting OTF files to SIX format has never been easier. Our Online OTF to SIX Converter offers a simple and efficient way to transform your OTF files into SIX files without the need for complicated software. Whether you are working in design, development, or multimedia, this tool is optimized to meet your conversion needs quickly and accurately.
OTF (OpenType Font) is a widely used font format known for its advanced typographic features and broad compatibility. SIX is a specialized font extension designed for specific platforms requiring compact and optimized font files. While OTF focuses on versatile font use across various systems, SIX files are tailored for performance in targeted applications.
Keep individual OTF files under 50–100MB for fastest uploads and lower memory use; very large fonts (multiple MBs with many glyphs) may be slower to convert.
To preserve typographic quality, enable full-glyph and hinting preservation when converting; avoid subset-only modes unless you only need a limited character set.
For batch conversion, group files into ZIP archives and use a conversion tool that supports queued or API-driven processing to maintain naming and metadata.
Note format-specific limitations: SIX implementations sometimes do not support advanced OpenType features (contextual substitutions, complex GSUB/GPOS tables) or variable-font axes—test converted fonts in the target environment.
This OTF to SIX converter saved me hours of work and delivered perfect results.
Emma R.
Graphic Designer
Quick and easy conversion with no quality loss, highly recommend for all font conversions.
Mark L.
Web Developer
The online tool is intuitive and reliable, making font format changes seamless.
Nina S.
Content Creator
Start your free OTF to SIX conversion now.
Drag your file here to to upload.
Up to 250MB
If compatibility problems appear, try exporting a simpler OTF (flatten complex features or convert variable fonts to static instances) before converting to SIX.