OTF to WOFF Converter
Convert OpenType Font (OTF) to Web Open Font Format (WOFF) online for free. Runs 100% in your browser. Files never leave your device. No signup, no watermarks, no limits.
Drag & drop files here, or browse
Processed on your device. Nothing is uploaded
Automate this. An open tab can convert whole folders via the Local API - still zero uploads.
Local API →How to use OTF to WOFF Converter
- 01Add files
Choose files or drop them here
- 02Settings
Settings · Runs on your device
- 03Download
Processed on your device. Nothing is uploaded
What is a OTF (OpenType Font) file?
OTF extends TrueType with PostScript outlines and advanced typographic features. It is the professional standard for print and design work.
- Developed by
- Microsoft & Adobe
- Initial release
- 1996
What is a WOFF (Web Open Font Format) file?
WOFF is a compressed wrapper for TTF/OTF fonts designed for websites. Smaller downloads, same rendering. Supported by every browser since 2012.
- Developed by
- W3C
- Initial release
- 2010
Frequently asked questions
How do I convert OTF to WOFF?
Click “Choose Files” or drag your OTF file onto the page, optionally adjust the settings, then hit Convert. Your WOFF file downloads straight from your browser. Nothing is uploaded anywhere.
Is this OTF to WOFF converter free?
Yes, completely free with no hidden limits, watermarks or signup. Because all processing happens on your own device, there are no server costs to pass on to you.
Are my files uploaded to a server?
No. The conversion engine runs entirely in your web browser using WebAssembly. Your files never leave your device. You can even disconnect from the internet after the page loads and keep converting.
Is there a file size limit?
We impose no fixed limit. The practical ceiling is your device's free memory, since processing happens locally. Most conversions work comfortably with files up to a few hundred megabytes, and image or document conversions handle much more.
Does it work on my phone?
Yes. The converter runs in any modern browser on Windows, macOS, Linux, Android and iOS. No app installation is required.