Font Converter
Free online font converter. Convert TTF, OTF, WOFF and WOFF2 fonts in your browser with batch support. All conversion runs locally — your font files are never uploaded.
Which font formats can this tool convert?
The converter handles TTF, OTF, WOFF and WOFF2 inputs and outputs TTF, WOFF and WOFF2. WOFF is unpacked with zlib decompression, WOFF2 with the woff2 decompressor, and TrueType output is written with opentype.js.
Why is OTF (CFF) output not available?
The tool writes only TrueType (quadratic) outlines. There is no reliable browser-side CFF writer, so OTF output is disabled in the menu. CFF-based fonts are automatically converted to TrueType outlines when you choose TTF output.
Are my font files uploaded anywhere?
No. Every conversion happens locally in your browser using bundled open-source libraries. Fonts often carry restrictive licenses, and with this tool they never leave your computer.
Can I convert several fonts at once?
Yes. Add as many font files as you like, choose one target format, and convert them in a single batch. Results can be downloaded individually or all together as a ZIP archive.
Will the converted font keep its metadata and glyphs?
Glyph outlines, character maps and name records are preserved. WOFF and WOFF2 recompression keeps every table intact; TTF conversion of CFF fonts rebuilds outlines as quadratic curves, which can change curve smoothness slightly.
How much smaller is WOFF2 than TTF?
WOFF2 typically compresses fonts by 30-50% compared to raw TTF thanks to Brotli compression and table transforms, which is why it is the recommended format for web fonts.
Why does a conversion fail for my font?
Corrupt files, exotic table layouts or fonts with unsupported hinting can fail. The tool shows a localized error naming the exact file, and the rest of the batch still converts.
What is the difference between TTF, OTF, WOFF and WOFF2?
TTF uses quadratic TrueType outlines, OTF uses cubic CFF outlines. WOFF is a zlib-compressed wrapper around either, and WOFF2 is its successor with Brotli compression, offering the smallest web font sizes.
How to Use Font Converter
Font Converter transforms fonts between TTF, OTF, WOFF and WOFF2 entirely inside your browser, using opentype.js, a built-in WOFF (de)packer and the woff2 WebAssembly decompressor/compressor. Font files are often license-restricted — here they never leave your computer.
- Drag one or more font files (TTF, OTF, WOFF or WOFF2) onto the drop zone. Each file is listed with a format badge and its size.
- Pick the target format from the Convert to select: TTF, WOFF or WOFF2. OTF output is disabled because the tool only writes TrueType outlines.
- Press Convert. Files are processed one by one with a progress bar; each result row shows the font family name and the size change from original to converted.
- Download each converted font with the button on its row, or press Download all (ZIP) to grab the whole batch as a single archive.
- Use Clear all to empty the list and start a new batch.
For web projects choose WOFF2 — Brotli compression typically shrinks fonts by 30-50% versus TTF. Keep the TTF as a fallback for older browsers.
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