Convert a Font File Between TTF, OTF & WOFF

You’ve got a .ttf font file — maybe from a client’s brand kit, maybe downloaded from a type foundry — and you’re building a website that needs .woff2 for fast page loads. Or the reverse: a designer sent you a .otf and your old software only opens .ttf. Either way, the font itself is fine; it’s just packaged in the wrong container for what you’re trying to do with it.

Design software can usually open a font file to look at it, but exporting it to a different format is a different feature entirely, often buried in a menu or missing altogether. And installing a dedicated font-conversion desktop app for a task you’ll do twice a year is a lot of setup for a fairly mechanical repackaging job.

What converting a font file actually involves

TTF, OTF, WOFF, and WOFF2 all describe the same underlying idea — outlines, metrics, and hinting data for a typeface — packaged differently. TTF and OTF are the formats operating systems and design apps expect installed locally; WOFF and WOFF2 are compressed wrappers built specifically for the web, where file size affects page load time. Converting between them is mostly repackaging: unwrapping the outline data from one container and wrapping it in another, with WOFF2’s added compression step being the main real transformation.

The part that actually matters to check is whether the glyph data survives the round trip intact — the letterforms, kerning, and any special characters the font includes shouldn’t change just because the file extension did.

Why people get stuck here

• Design software doesn’t export every format. A tool that opens .otf for viewing often can’t re-save it as .woff2 without a plugin or separate utility.
• Web performance requirements. Serving a .ttf on a website works, but it’s larger than .woff2 and slows down font loading for visitors.
• Legacy compatibility. Some older software or embedded systems only accept .ttf or .otf, not the web-oriented compressed formats.
• No way to preview first. Converting blind, without seeing how the font actually renders with your own text, risks discovering a broken or substituted glyph only after deployment.

What a good font converter looks like

A live preview with your own text

Typing your actual heading or body text and seeing it rendered in the font, before converting, catches obviously wrong or corrupted font files early.

Support for the formats you actually need

TTF, OTF, WOFF, and WOFF2 covering both the “for design software” and “for the web” use cases in one place, rather than juggling separate tools.

Reliable glyph fidelity

The converted file should render identically to the original — same letterforms, same special characters — not a lossy approximation.

Common mistakes to avoid

• Serving .ttf fonts on a production website when .woff2 would load significantly faster for visitors — check your @font-face rules include the compressed formats.
• Converting a font you don’t have a license to redistribute — font licensing terms vary, and format-shifting doesn’t change whether you’re allowed to use or share the file.
• Assuming every font converts identically — variable fonts and some OpenType feature sets can behave differently across formats.
• Skipping the preview step and only discovering a glyph issue after the font is already deployed somewhere.

How to do it with Font Converter

Online Tool Store’s Font Converter processes the font file locally in your browser — nothing is uploaded to a server.

1. Open the tool and upload your font file.
2. Type sample text into the preview to check how the font actually renders.
3. Choose the target format — TTF, OTF, WOFF, or WOFF2.
4. Download the converted file.

Because conversion happens locally, it’s a quick way to repackage a font without installing design software just for this one task.

Frequently asked questions

What’s the difference between WOFF and WOFF2?

WOFF2 uses better compression and produces smaller files for the same font, which is why it’s now the preferred format for web fonts — WOFF still exists mainly for compatibility with older browsers.

Will converting a font change how it looks?

No, if the conversion is done correctly — TTF, OTF, WOFF, and WOFF2 all store the same underlying outline data, just packaged and compressed differently, so letterforms should render identically.

Can I convert a font I downloaded for free online?

Check the font’s license first — “free to download” doesn’t always mean “free to convert and redistribute in another format.” Personal-use-only licenses in particular can restrict repackaging or embedding on a public website.

Final thought

Format conversion for fonts is mostly mechanical repackaging, not a redesign — the real work is confirming the license allows what you’re about to do with the converted file, and previewing it before you deploy.

Try the free Font Converter