OTF to TTF Converter
This free OTF to TTF converter turns an OpenType font (.otf) into a TrueType font (.ttf) — and works in the other direction too, converting .ttf to .otf. Unlike renaming the file, this is a real conversion: the PostScript/CFF curves inside an OTF are mathematically rebuilt as TrueType outlines. Everything runs entirely in your browser, so your font is never uploaded, and there is no signup and nothing to install.
Drop an OTF or TTF file here
.otf → .ttf · .ttf → .otf · click to browse
Real outline conversion, done locally: PostScript/CFF curves are rebuilt as TrueType outlines (and vice versa) — the file is not just renamed. Hinting and some advanced OpenType layout features are dropped, as with any converter.
How to convert OTF to TTF
- Drag your
.otffile onto the upload area, or click to browse and select it from your device. - The tool reads the font and shows its family name, glyph count, and outline type — plus a live preview you can type in.
- Click Convert to TTF & download. The cubic PostScript curves are converted to quadratic TrueType outlines and the
.ttfdownloads immediately. - To go the other way, just drop a
.ttffile instead — the button becomes Convert to OTF & download automatically.
After converting, the tool re-opens the new file and confirms the glyph count, so you know the output is a valid, complete font. Everything happens locally in your browser — licensed or unreleased fonts stay private on your machine.
OTF vs TTF: what actually changes?
OTF and TTF are both OpenType containers; the real difference is the math used to draw the letterforms. OTF files store PostScript/CFF outlines built from cubic Bézier curves, while TTF files store TrueType outlines built from quadratic curves. Converting between them means re-expressing every curve in the other system — which this tool does — not just changing the file extension.
| Format | Origin | Outline type | Curves | Typical use |
|---|---|---|---|---|
| OTF (OpenType/CFF) | Microsoft & Adobe, 1996 | PostScript / CFF | Cubic Béziers | Print design, professional type from foundries |
| TTF (TrueType) | Apple, shipped with System 7 in 1991 | TrueType glyf | Quadratic Béziers | Broadest compatibility: Windows, office apps, game engines, embedded devices |
Quadratic curves can approximate cubic ones extremely closely, so a converted font looks virtually identical at any normal size. Two things do not survive any OTF↔TTF conversion, here or anywhere: manual hinting instructions, and occasionally some advanced OpenType layout features. For body text and display use the difference is invisible; for tiny sizes on low-resolution screens the original file is always the gold standard.
Why convert OTF to TTF?
TTF remains the most universally accepted font format. Common reasons to convert:
- An app refuses the OTF. Some Windows programs, office suites, embroidery and cutting software, game engines, and embedded systems only load
.ttffiles. - Cross-platform consistency. Device firmware, Android ROMs, and kiosk systems frequently require TrueType.
- Legacy toolchains. Older design or signage software predates wide OTF support.
Going the other way, designers sometimes prefer .otf for print workflows or because their font manager organizes PostScript-flavored files separately.
Installing your converted font
Once the .ttf (or .otf) has downloaded, installing takes seconds:
- Windows: double-click the file and click Install (or right-click → Install for all users).
- macOS: double-click to open it in Font Book, then click Install Font.
- Linux: copy it into
~/.local/share/fonts(or~/.fonts) and refresh the font cache.
Restart any apps that were open so they pick up the new font.
Frequently asked questions
Is this a real conversion or just a renamed file?
A real conversion. Renaming .otf to .ttf leaves PostScript curves inside a file that claims to be TrueType, which is exactly what makes some software reject it. This tool rebuilds every glyph’s outlines in the target format and then re-validates the result.
Does converting OTF to TTF lose quality?
The letterform shapes are preserved to sub-pixel accuracy — quadratic curves approximate the original cubics so closely you cannot see the difference at normal sizes. What is dropped is manual hinting (tiny-size screen tuning) and, in some fonts, certain advanced OpenType features. That is true of every OTF→TTF converter, including server-based ones.
Can I convert TTF to OTF with this tool too?
Yes. Drop a .ttf file and the tool automatically switches direction, rebuilding the TrueType outlines as PostScript/CFF and downloading an .otf.
Is it free and private?
Yes. The converter is completely free with no signup, no watermarks, and no file limits. Unlike most online converters, which upload your font to their servers and keep it there for hours before deleting it, this tool runs entirely in your browser — your font never leaves your device at all.
Is there a file size limit?
No hard limit. Because there is no upload step, there is no server-side cap — typical fonts convert in under a second, and even large multi-thousand-glyph families only need a bit more of your device’s memory.
Can I convert multiple fonts at once?
The tool converts one file at a time, but each conversion is instant and there is no queue, credit system, or daily cap — converting a whole family one file after another takes seconds.
Is it legal to convert a font?
Converting a format does not change your license. Only convert fonts you have the right to use, and the font’s EULA still governs how you may use the converted file. Check the license before distributing or embedding the result.
What about WOFF and WOFF2 files?
Those are compressed web wrappers rather than desktop formats. Use our Font Converter to unwrap or create web fonts, then bring the resulting TTF or OTF here if you need to switch outline formats.