Pick the other format
Choose the source format in the converter above. The target is already set to OTF, so you only add the file.
OTF converter
Drop a .ttf file here or click to upload
OTF, OpenType Font
OTF (OpenType Font) is the modern professional font format used by virtually every type foundry shipping new typefaces today. Built on top of the TrueType container and jointly developed by Adobe and Microsoft, OTF supports advanced typographic features, ligatures, stylistic sets, small caps, contextual alternates, multiple language scripts, that older formats could not express. Every modern operating system, design tool, and browser understands OTF natively, which is why it has become the default master format for new typeface releases.
Extension .otfMIME font/otfCompression NoneCategory Desktop font
Why use indox to work with OTF?
Add a font and watch it convert
Drop a font on the box or browse for one. A progress row shows while the job runs.
Download the result
When the job finishes you see the new file name. Download it, or convert another font straight away.
Supported operations
Compress
Repack the font into a smaller, browser-ready container.
Decompress
Unpack a compressed web font back to its raw outline data.
Subset
Ship only the glyphs a page actually uses.
How do I convert a font to OTF?
- 1
Choose the source format
Pick the format of the font you have. OTF is already the target.
- 2
Add your font
Drop the file on the upload box or click to browse, then press Convert to OTF.
- 3
Download the new font
Wait for the result, then download it. Free-tier files are deleted automatically.
When to use OTF
Adobe and Microsoft announced OpenType in 1996 as a unified successor to the rival TrueType and PostScript Type 1 standards. The first widely distributed OpenType fonts shipped in 2000 alongside Adobe's Open Source font program. Critically, OTF lifted the encoding ceiling to full Unicode and added the powerful GSUB and GPOS layout tables that let a single font express different glyph variants for different writing contexts. By the late 2000s every major foundry, Adobe, Hoefler & Co, Monotype, Linotype, FontShop, had migrated their libraries to OpenType. Today OTF is the format the typography industry actually designs for; downstream formats such as .woff, .woff2, and .ttf are usually exports of an OpenType master file. One notable wrinkle: although OpenType is officially typeface-neutral, in practice OTF files almost always carry cubic Bézier outlines in a CFF table, while TTF files carry quadratic Bézier outlines in a glyf table, the same container, but two different geometry conventions that every font tool has to handle separately.
- Professional typography in print, editorial, and brand design
- Multi-script and multi-language documents that need OpenType layout features
- Adobe Creative Suite, Affinity, Sketch, Figma, and similar design tools
- Distributing your own typeface as a desktop licence
What are the limits for OTF conversion?
Size
The upload box shows the live size limit before you add a file. Signing in raises it, and paid plans raise it further.
Formats
OTF converts to and from the other seven public font formats. The lists further down the page link to each pair.
Privacy
Files are uploaded to Cloudflare R2 storage for processing and are encrypted in transit.
Deletion
Free-tier files are deleted automatically after the job finishes. Signed-in output stays in your history for your plan's retention period.
Limits worth knowing
- Converting a file does not change its licence. Check that the licence lets you convert the font and embed it on the web.
- Converting between outline types can change how a font hints at small sizes, so test the result where you plan to use it.
- Keep the original font. A conversion writes a new file and leaves yours as it was.
What do the free and paid plans add?
Free
- All converters
- Daily credit refresh
- Email support
Basic
- Access to all features
- AI Extract & Doc Chat
- Priority conversions
- Email support
Highest priority
Premium
- Everything in Basic
- Highest priority queue
- Larger file limits
- Priority support
Pay-As-You-Go
- No subscription
- Credits never expire
- Opt-in auto-refill
- Access to all features
What else can I do with fonts?
Go beyond conversion: open the font workspace
Inspect a font for free in the font workspace, then convert it.
Open the font workspaceWorking with documents instead?
For PDFs, Word, PowerPoint and scans, AI Extract turns documents into clean Markdown or JSON, tables, layout and reading order preserved.
Open AI Extract →
Who needs a OTF converter?
Web developers
Turn the font a designer sent into a file you can load with @font-face.
Designers and print teams
Convert a web font back into one you can install, when its licence allows it.
People keeping older sites alive
Move an old font on an older site into a format current browsers open.
Where can I read more about fonts and formats?
Which other font conversions can I run?
Convert OTF to other formats
Convert other formats to OTF
Do it all with indox
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OTF FAQs
What can OTF do that TTF cannot?
Technically both formats share the same container, so they have the same theoretical capabilities. In practice OTF files ship with the full OpenType feature set enabled, small caps, ligatures, stylistic alternates, fractions, ordinals, contextual swashes, while TTF files usually do not. OTF is also the format type designers actually master in.
Can I use OTF on the web?
Yes, via @font-face, but you should convert it to WOFF2 first. WOFF2 wraps the same OTF data in a Brotli-compressed envelope that ships roughly 70 percent fewer bytes, with no visual difference.
How do I convert OTF to TTF?
Use our online converter, upload your .otf file and pick TTF as the target. The glyph outlines transfer cleanly, though some OpenType advanced features may flatten because target software often does not honour them under the TTF flavour.
Is the OTF converter free?
Yes. Free conversions need no signup and add no watermark.
Do I need an account?
No. You can convert a font without signing up. Signed-in conversions use credits, and the result stays in your history.
Can I convert OTF to other formats?
Yes. Every pair has its own page. The links under the conversion lists open them.
Am I allowed to convert and use any font?
Converting a file does not change its licence. Check that the licence lets you convert the font and embed it on the web before you publish it.