Convert TrueType (TTF) to OpenType (OTF) Online Free
Convert TrueType fonts to OpenType CFF format for professional design workflows. OTF with CFF outlines uses cubic Bezier curves that offer smoother shapes with fewer control points, preferred by many type designers and design professionals.
By ChangeThisFile Team · Last updated: March 2026
To convert TTF to OTF, drop your .ttf file onto the ChangeThisFile converter. The font is processed entirely in your browser using opentype.js — no upload needed. Quadratic TrueType outlines are converted to cubic CFF curves, producing a standard OpenType font. Completely free and private.
Convert TrueType (TTF) to OpenType (OTF)
Drop your TrueType (TTF) file here to convert it instantly
Drag & drop your .ttf file here, or click to browse
Convert to OpenType (OTF) instantly
TrueType (TTF) vs OpenType (OTF): Format Comparison
Key differences between the two formats
| Feature | TrueType (TTF) | OpenType (OTF) |
|---|---|---|
| Outline type | Quadratic Bezier curves | CFF cubic Bezier curves |
| Control points | More points per curve | Fewer points, smoother curves |
| Hinting | Full TrueType grid-fitting | Type 1 hints (simpler model) |
| Design tools | All applications | Preferred in Adobe and modern tools |
| File size | Slightly larger outlines | Often more compact (CFF encoding) |
| Curve precision | Approximation with quadratics | Exact cubic representation |
| Industry use | System fonts, game engines | Professional typography, print |
When to Convert
Common scenarios where this conversion is useful
Professional design and typography workflows
Many designers and typographers prefer OTF/CFF for its more efficient curve representation. Convert TTF to OTF when your design tools or workflow expects OpenType CFF fonts.
Matching font format requirements for clients
Some brand guidelines or client specifications require OTF format deliverables. Convert your TTF source fonts to meet these requirements.
Preparing fonts for Adobe workflows
Adobe applications have historically handled CFF/OTF fonts well. Converting TTF to OTF can ensure smoother integration with InDesign, Illustrator, and Photoshop projects.
Reducing control point density
CFF cubic curves can represent the same shapes as TrueType quadratics with fewer points, which can simplify font editing and reduce outline complexity.
Who Uses This Conversion
Tailored guidance for different workflows
Web Developers
- Convert TrueType (TTF) fonts to OpenType (OTF) for optimized loading on websites with @font-face declarations
- Transform TrueType (TTF) font files to OpenType (OTF) for cross-browser compatibility in web projects
Graphic Designers
- Convert TrueType (TTF) fonts to OpenType (OTF) for embedding in design tools or desktop publishing software
- Transform TrueType (TTF) font files to OpenType (OTF) for use in print projects that require specific font formats
Typographers
- Convert TrueType (TTF) font files to OpenType (OTF) for testing and previewing typefaces across different platforms
- Transform TrueType (TTF) fonts to OpenType (OTF) for building multi-format font packages for distribution
How to Convert TrueType (TTF) to OpenType (OTF)
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1
Drop your TTF file
Drag and drop your .ttf font file onto the converter, or click to browse. Any standard TrueType font is accepted.
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2
Instant conversion
The font is parsed in your browser using opentype.js. TrueType quadratic outlines are converted to CFF cubic Bezier curves, and all kerning, metrics, and naming tables are preserved.
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3
Download your OTF file
Click Download to save the converted .otf font file. Use it in design software, install it on your system, or convert further to WOFF2 for web use.
Frequently Asked Questions
No. The conversion from quadratic to cubic curves is mathematically lossless in this direction — quadratic curves are a subset of cubic curves. The glyph shapes are preserved exactly.
OTF/CFF is preferred in professional typography workflows, uses fewer control points for the same shapes, and is the standard output format for most type design tools like Glyphs and RoboFont.
Yes. All GPOS kerning data, GSUB substitution features (ligatures, alternates, etc.), and other OpenType layout tables are preserved during conversion.
Yes. Every quadratic Bezier can be exactly represented as a cubic Bezier. This direction of conversion is mathematically exact, unlike the reverse (cubic to quadratic).
TrueType hinting instructions are specific to the TrueType format and do not carry over to CFF. The converted OTF will use CFF's simpler hinting model instead.
Yes. OTF fonts are natively supported on Windows (Vista+), macOS, and Linux. Install them through your system's font management tools.
Often yes. CFF encoding is more compact than TrueType outlines, especially for fonts with complex glyphs. The reduction varies but can be 10-20% for glyph-heavy fonts.
Yes. The conversion runs entirely in your browser using JavaScript. No font data is transmitted to any server, keeping your fonts private and secure.
Variable font conversion between outline formats is complex. Simple static TTF fonts convert reliably, but variable fonts with multiple axes may require specialized type design tools.
Neither — use WOFF2 for web delivery. WOFF2 provides the best compression regardless of whether the source is OTF or TTF. Keep OTF/TTF for desktop and design use.
Related Conversions
Need to convert programmatically?
Use the ChangeThisFile API to convert TrueType (TTF) to OpenType (OTF) in your app. No rate limits, up to 500MB files, simple REST endpoint.
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