twineconvert

free · in-browser · no upload

OTF to TTF
Converter

Drop your OTF file. We'll convert it to TTF right here in your browser, your file never leaves your device.

or drop your file

Select your file here to get started

or drop your file here.

Accepts .otf

nothing uploaded no file size cap no signup

How it works

Three steps. No upload, no signup.

  1. 1

    Drop your file

    Click the dropzone above or drag a OTF from your desktop. Files of any size, there's no upload, so there's no upload limit.

  2. 2

    Convert in your browser

    The conversion runs entirely in this tab using JavaScript and WebAssembly. Your file never touches our servers, we don't have any.

  3. 3

    Download

    Get your TTF the moment the conversion finishes. Convert another, or close the tab.

Files stay on your device

Your file is never uploaded. The entire conversion runs in your browser using WebAssembly. We can't see what you convert because we have no server to see it.

No file size limit

Server converters cap free users at 1-2 GB and gate larger files behind a paid plan. Since nothing uploads, our limit is whatever your browser can handle.

Free, no signup, no ads on conversions

No account required. No watermark on the output. No queue. Drop a file, get a converted file.

Formats involved

About OTF and TTF

OTF, OpenType Font

OTF is the modern font container format (Microsoft + Adobe, late 1990s) that supersedes TTF. Same SFNT wrapper but supports CFF (PostScript) glyph outlines in addition to TrueType outlines, plus advanced typographic features like ligatures, alternate glyphs, small caps, and contextual substitutions. Every modern OS reads OTF as natively as TTF; many designer fonts ship as OTF for the typographic features.

How to open

Same as TTF: double-click to install on Windows, macOS, Linux. Use in CSS via `@font-face` (or convert to WOFF2 first for web delivery).

Full OTF format guide →
TTF, TrueType Font

TTF is the font container format developed by Apple in the late 1980s and adopted by Microsoft in Windows 3.1. Stores quadratic Bézier glyph outlines, hinting data, and font metadata (kerning, OS/2 flags, naming). Every operating system reads TTF natively. Mostly superseded for web use by WOFF/WOFF2 (smaller compressed wrappers around the same SFNT data) but TTF remains the source format and the universal install target.

How to open

Double-click on any OS to preview + install. Font management tools (FontBook on macOS, Windows Fonts, Linux fc-cache) handle batch installs. To use on the web, convert to WOFF2 first.

Full TTF format guide →

Related tools

Convert other files to TTF

FAQ

Common questions

Is this OTF → TTF converter really free?

Yes. No signup, no watermark, no daily file count limit. Every conversion runs in your browser, your file never touches our servers because there are no servers.

Where does my file go when I convert it?

Nowhere. The conversion runs entirely in your browser using JavaScript and WebAssembly. Your file is never uploaded to our servers. We don't have any servers handling files, there's nothing for us to log, store, or accidentally leak.

What's the maximum file size?

Whatever your browser can hold in memory. Practically, this means a few hundred MB on most computers, significantly larger than the 1-2 GB caps that server-upload converters charge for. Very large files (multi-GB) may require closing other browser tabs first.

Why convert OTF to TTF?

Designer typography with advanced OpenType features. Desktop font installation and the source format for web fonts. The most common reason to convert is compatibility, TTF works in places where OTF doesn't, or vice versa.

How do I open a OTF file in the first place?

Same as TTF: double-click to install on Windows, macOS, Linux. Use in CSS via `@font-face` (or convert to WOFF2 first for web delivery).

Does this work offline?

Once the page is loaded, the conversion itself runs entirely offline. The first time you use a tool, your browser downloads the conversion library (a one-time cache). If you reload while offline, the page won't load, but you can install the site as a Progressive Web App for full offline use.

Can I convert multiple files at once?

Single file at a time for now. Batch conversion is on the roadmap, for now, drop one file, download the result, then convert the next.