OTF to TTF Converter
Convert OpenType/PostScript (.otf) fonts to TrueType (.ttf) with a real outline conversion.
Complete the security check to begin
About Converting OTF to TTF
OpenType/PostScript fonts (.otf) store their glyph shapes as cubic Bezier curves in a CFF table. TrueType fonts (.ttf) store them as quadratic B-splines in a glyf table, with an accompanying loca table of offsets. Some software will only take the latter: certain game engines, embedded and firmware font pipelines, older Android builds, some print RIPs and a number of older Windows applications all expect TrueType outlines specifically. This converter redraws every glyph as quadratic curves, generates the glyf and loca tables, recomputes the TrueType-specific limits in maxp, restores glyph names in the post table, and sets the sfnt version tag to the TrueType value.
That last detail is why renaming a file does not work, and it is a genuinely instructive failure. A rasteriser dispatches on the sfnt tag: leave an OTF’s OTTO tag in place and FreeType picks its PostScript driver, goes looking for the CFF table, and rejects the font as having a missing table — even when the outlines inside are perfectly good. A real conversion has to rewrite the outlines, add the tables TrueType requires, and correct the tag.
Common use cases
- Supplying a font to a game engine, firmware or embedded pipeline that requires TrueType outlines
- Satisfying older Android, Windows or print RIP software that will not load CFF-based fonts
- Standardising a font library on one flavour for a build system or asset pipeline
- Producing a valid TTF after a renamed .otf was rejected as a missing-table error
- Preparing a font for a tool whose hinting or subsetting stage only handles glyf
Tips for best results
- Advance widths are preserved exactly, so text set in the converted font takes up the same space and no layout reflows.
- CFF hinting does not translate into TrueType bytecode hinting, so the result relies on the rasteriser’s own autohinter. On current systems that is the normal path anyway.
- The glyf outlines are quadratic approximations of the original cubic curves, held to within one design unit — a fraction of a pixel at reading sizes.
- Outline conversion is limited to 10,000 glyphs; whole-Unicode and full CJK fonts are larger. Converting to WOFF or WOFF2 instead leaves the outlines untouched and has no cap.
How to Convert OTF to TTF Online
Converting OTF to TTF with PrivConvert takes three quick steps and no software to install. What you gain with TTF: universal OS and app support.
Drag and drop your file into the upload area, click to browse your device, or paste a URL to a file hosted online. You can upload files up to 250 MB and batch convert up to 20 files at once.
Once uploaded, the conversion from OTF to TTF starts automatically. The process runs entirely in an isolated environment - your data never leaves the secure pipeline.
Your converted file is ready instantly. Click the download button to save it to your device. The file is deleted from memory immediately after download.
Why choose PrivConvert?
Converting OTF to TTF should not mean handing a stranger a permanent copy of your data. PrivConvert processes everything in memory and forgets it instantly.
Every upload and download is protected with TLS 1.3, so your file cannot be intercepted on the way to the server or back to you.
Convert instantly with no sign-up, no email and no profiling cookies. We never build a profile around you or the files you convert.
Runs in any modern browser on Windows, macOS, Linux, Android and iOS — no install, plugin or desktop software needed.
Each job runs in an isolated in-memory sandbox, so most conversions finish in seconds instead of waiting in a queue.
OTF vs TTF - Format Comparison
| Feature | OTF | TTF |
|---|---|---|
| File extension | .otf | .ttf |
| Supported by PrivConvert | Yes (as input) | Yes (as output) |
| Privacy-safe conversion | In-memory, zero storage | |
| Max file size | 250 MB per file | |
| Batch support | Up to 20 files simultaneously | |
Built for people who value their privacy
From one-off files to daily batches, thousands of people rely on PrivConvert precisely because it keeps nothing once the job is done.