WOFF and WOFF2 are font formats built specifically for websites. They are compressed so pages download faster, and they are designed to be served over the web rather than installed on a computer.
WOFF
WOFF, the Web Open Font Format, wraps a font in compression so it transfers efficiently to a browser. It has broad support across browsers and remains a safe fallback.
WOFF2
WOFF2 is the successor to WOFF and compresses fonts even further, typically producing smaller files. Smaller files mean text appears sooner, which helps performance and Core Web Vitals. It is supported by every modern browser.
Which to use on a website
Serve WOFF2 as the primary format for the best performance, and optionally offer WOFF as a fallback for older browsers. For installing a font on your own computer, use TTF or OTF instead, since WOFF files are meant for the web.
Practical summary
Put this guide into practice
Choose the format for the destination
- Use TTF or OTF for normal desktop installation unless a workflow requires something else.
- Prefer WOFF2 for modern websites and load only the families and weights the page actually uses.
- Test converted fonts before production because conversion cannot repair a damaged source file.
- Keep the original font and licence even when you create a web format copy.
Choose font formats for desktop and web use
TTF vs OTF, WOFF vs WOFF2 and variable font formats are common practical questions. For most current websites WOFF2 is the preferred delivery format, while TTF and OTF remain normal choices for desktop installation and design applications.
- Use only the webfont weights and styles the live site actually needs.
- Test converted files in more than one browser before replacing a working production font.
- Keep fallback fonts in CSS so content remains readable while webfonts load.
- Use font subsetting only when you understand which languages, symbols and characters the project needs.
How to validate the result in a real project
Apply the advice from WOFF vs WOFF2 to the actual words, dimensions and delivery format instead of judging it only from a sample. Compare at least two realistic options, check the smallest important text, and review the design on the device or medium where people will actually see it.
For client or commercial work, keep the font or resource source and licence with the project files. That makes future revisions easier and prevents a visually successful choice from becoming a licensing or production problem later.
- Preview real copy rather than placeholder text.
- Check desktop and mobile sizes when the work will appear on the web.
- Compare readability, hierarchy and visual personality before choosing a final direction.
- Save the source, licence and version of every font or resource used.
Common mistakes to avoid
- Using desktop font files directly on a website when a web font format is available.
- Loading every weight and style even when only two are used.
- Assuming format conversion changes the font licence.
Guide FAQ
Questions about WOFF vs WOFF2
Which font format should I use after reading WOFF vs WOFF2?
Use TTF or OTF for normal desktop installation and WOFF2 for most modern web delivery. Keep the original source file and licence even when you create another format for a project.
Does converting a font improve its visual quality?
No. Conversion changes the container or web-delivery format; it does not redraw the typeface or repair poor outlines in the source font.
Can I convert any font I download?
Only if its licence allows the intended modification, embedding or web use. Format conversion does not override the original licence.
Why should I keep WOFF2 files small on a website?
Font files compete with other page resources during loading. Using only the families, weights and character coverage the site needs helps text render sooner and reduces unnecessary transfer size.
Is WOFF2 better than TTF for a website?
WOFF2 is designed for web delivery and normally provides better compression. TTF can be useful as a desktop source, but using a webfont format is usually a cleaner production choice.
Will converting a font make a website faster automatically?
Format helps, but performance also depends on the number of families, weights and characters loaded. A small, intentional font set usually matters more than conversion alone.
Can variable fonts reduce the number of font files?
They can combine multiple design axes in one resource, but the final file size and browser needs still have to be tested for the specific family and site.
Licence terms vary from one font to another. Always review the licence included with a specific font before using it, especially for commercial work.