Convert TTF to OTF online with every glyph, kerning pair and OpenType feature kept. Upload files up to 20GB and download the converted result in a few clicks.
Convert OTF to TTFDrag & Drop your TTF file here
TTF files, up to 20GB
Files stay private.
Automatically deleted after 24 hours.
Link
20GB upload limit.
5.0/5
Trusted for 1,827,796+ conversions
HOW IT WORKS
Three steps, no account, nothing to install.
01
Upload your TTF fonts
Drag in .ttf files from a font download, a designer or your system fonts folder.
02
Convert to OTF
Start the conversion. FontForge converts the TrueType curves to CFF and adds new PostScript hints.
03
Download the OTF
Download each OTF, or a whole family as one ZIP.
TTF
TTF is the TrueType font format from Apple and Microsoft, installable on Windows, macOS, Linux and most apps.
OTF
OTF is the OpenType font format, usually carrying PostScript-style (CFF) outlines and advanced typographic features.
FILE FORMATS
SOURCE
Apple developed TrueType in the late 1980s and licensed it to Microsoft, and it became the font format of both Windows and the Mac. TTF uses quadratic curves and detailed hinting instructions that keep text sharp at small sizes on screen. Every desktop system, Office suite and design app installs it.
TARGET
OpenType was created by Microsoft and Adobe in 1996 as a successor to TrueType and Type 1. An .otf file usually holds CFF outlines with cubic curves, preferred by type designers, plus OpenType features such as ligatures, small caps and alternates. Windows, macOS and design apps install it like any other font.
| Feature | TTF | OTF |
|---|---|---|
| Developed by | Apple and Microsoft | Microsoft and Adobe |
| File extension | .ttf | .otf |
| Outlines | TrueType (quadratic) | CFF (cubic) or TrueType |
| Compression | None | None |
| Best for | Installing on desktops | Professional desktop typography |
| Works in | Windows, macOS, Linux, apps | Windows, macOS, design apps |
USE CASES
When a workflow asks for OpenType fonts with CFF outlines.
Meet a print shop's font requirements
Some print and prepress workflows prefer CFF-based OpenType.
Match the rest of a font library
Keep a family in one outline format.
Edit curves in a cubic-based tool
Design tools built around cubic curves work naturally with CFF outlines.
Prepare fonts for a publishing system
Some publishing and typesetting tools expect .otf files.
Test how a font renders with PostScript hints
Compare TrueType and CFF rendering on your target systems.
Deliver a font to a client who asked for OTF
Hand over the format the brief specifies.
Standardize a design team's fonts
Store one format across a shared library.
Prepare fonts for a type specimen
Lay out CFF versions alongside the originals.
Convert a family in one go
Upload every style at once.
Keep a CFF copy for archiving
Store both outline formats of a font.
SUPPORTED FILES
Static TrueType fonts convert fully.
Every glyph keeps its place, Unicode mapping and advance width.
GPOS kerning, the old kern table and OpenType features are copied byte for byte.
Become a static OTF of the default style. The axes aren't kept.
Upload every style and download the OTF files as a ZIP.
Split a collection into separate TTF files first.
Check your font license allows modification before converting.
TROUBLESHOOTING
These explain the differences between the TTF and the OTF.
01
TrueType hinting can't exist in CFF outlines, so the OTF gets new PostScript hints from FontForge's autohinter.
02
Variable TrueType fonts become a static OTF of their default style, for example Quicksand[wght] becomes Quicksand Light.
03
Glyphs with very complex outlines are left unhinted. They still display correctly.
04
Uninstall the TTF before installing the OTF, since both share the same family name.
05
Restart the app or clear its font cache after installing.
06
Check the OTF in a font inspector to confirm its names and glyph count.
FontForge, fontTools and Google's woff2 command-line tools can convert fonts once installed. dragdropdo converts TTF to OTF in the browser, with nothing to set up.
| What matters | dragdropdo | FontForge and Font Tools |
|---|---|---|
| Nothing to install | ✓Yes. Runs in any modern browser. | ~Yes, a download, and the woff2 tools need the command line. |
| Works on phones and tablets | ✓Yes. Desktop, Android, iPhone and iPad. | ~No. Desktop only. |
| Batch conversion | ✓Yes. Add many files and download one ZIP. | ~Scripts can; FontForge goes one font at a time. |
| Share finished files | ✓Yes. Send a unique link from the result page. | ~You upload and share the files yourself. |
| Pricing | ✓Free with daily limits. $2.99 or $6.99 passes for unlimited use, no monthly plan. | ~Free. |
| Editing glyphs and metrics | ✓Not in the converter. The font's design is unchanged. | ~Yes. FontForge is a full font editor. |
Other tools use different pricing, limits and workflows. This comparison describes dragdropdo's own features without assuming every other tool works the same way.
1.8M+
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5.0
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from 2+ reviews
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Avg. conversion
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0
Files kept
Auto-delete in 24h
WHY DRAGDROPDO
Convert TTF to OTF in your browser, with nothing to install and nothing kept after 24 hours.
Private by default
Files are encrypted in transit and deleted from our servers automatically after 24 hours.
No install required
Convert in any modern browser on Windows, Mac, Linux, Android, iPhone or iPad. No app and no sign-up wall.
Big files and batches
Upload files up to 20GB each, add several at once, and download the results one by one or as a ZIP.
Share & download
Save finished files to your device or pass them on with a share link from the result page.
MORE TTF TOOLS
TrueType (TTF) is a scalable font format developed by Apple and adopted by Microsoft for Windows. A TTF file stores each glyph as an outline made of quadratic curves, usually with hinting instructions for small sizes, plus spacing and kerning data; embedded bitmaps are optional and uncommon.
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FAQ
Answers to common questions about dragdropdo's TTF to OTF converter.
