Does converting OTF to WOFF2 reduce quality?

No, converting OTF to WOFF2 does not reduce quality. WOFF2 uses lossless compression, meaning the font outlines, glyphs, and visual appearance remain identical to the original. Only the file size changes.

What file size reduction should I expect?

You can expect a file size reduction of 50-70% when converting OTF to WOFF2. For example, a 150KB OPENTYPE FONT file typically compresses to around 45-75KB as WOFF2 due to Brotli compression.

Do WOFF2 fonts work in all browsers?

WOFF2 works in all modern browsers: Chrome 36+, Firefox 62+, Safari 11.1+, and Edge (all versions). It's not supported in IE11 or older browsers.

Will my font's OpenType features work after conversion?

Yes, all OpenType features are preserved during conversion. This includes ligatures, kerning pairs, alternate glyphs, small caps, and other advanced typography features. The conversion process adapts the container format while preserving all font data.

Can I convert commercial/licensed fonts?

You can convert commercial fonts for testing purposes, but you must purchase the appropriate web font license before using them on a live website. Font licenses are format-specific – a desktop license for one format doesn't automatically grant web usage rights. Always check your license agreement or contact the foundry.

How is OTF different from WOFF2?

OpenType Font (OTF) is an advanced format supporting cubic Bézier curves and OpenType features. Web Open Font Format 2 (WOFF2) is the most efficient web format with Brotli compression. Choose based on your target platform and requirements.

What's the best format for my use case?

For modern websites, use WOFF2 as your primary format. Provide WOFF as a fallback for older browsers. For desktop applications, consider OTF or OTF.

Can I convert variable fonts?

Yes, variable fonts can be converted between formats while preserving all variation axes and design space. The conversion maintains the font's interpolation capabilities. Ensure your target browsers support variable fonts (Chrome 62+, Firefox 62+, Safari 11+).

OTF

WOFF2

OTF to WOFF2 Converter

Convert OpenType Font to Web Open Font Format 2. 50 MB file size, unlimited uploads. Fast, secure, and completely private conversion.

OTF to WOFF250 MB File Size100% Free ForeverFastPrivateInstant Processing

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Only OTF files are accepted

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Max file size 50 MB.

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Disclaimer: This tool is provided as-is for convenience and does not constitute legal advice. Font licenses vary; you are responsible for ensuring you have the rights to upload and convert files and that your intended use is permitted. Converting a font does not grant new rights. Results may be imperfect, and use is at your own risk.

Developer & Verifier

Developed by

Marcus Rodriguez

Lead Developer

Verified by

Sarah Mitchell

Product Designer, Font Specialist

Convert Any Font Format

Universal Font Converter

Convert to WOFF2 Format

Any Font to WOFF2

About This Conversion

Everything you need to know about converting between these formats

Source Format

OpenType Font

OpenType Font (OTF) is an extension of TrueType, offering advanced typographic features like ligatures and alternate glyphs. It supports more characters and is preferred for professional design work due to its superior font rendering capabilities.

Target Format

Web Open Font Format 2

WOFF2 is an improved version of WOFF with better Brotli compression, resulting in 30% smaller file sizes than WOFF. It's the preferred format for modern web applications and provides faster page load times.

Why Convert OTF to WOFF2?

Maximizing performance for modern web applications

Achieving the smallest possible font file size

Supporting latest Chrome, Firefox, Safari, and Edge browsers

Building progressive web apps with optimized assets

How to Convert OTF to WOFF2

Simple 3-step process that takes less than a minute

Upload Your Font

Select your OTF font file from your computer or drag and drop it into the converter above.

Convert Instantly

Click the convert button and our tool will process your font file in server RAM only. Files are processed and immediately deleted - never written to disk.

Download Result

Your converted WOFF2 file will be ready immediately. Download it and use it in your project.

OTF vs WOFF2: Feature Comparison

Technical comparison between source and target formats

Feature	OTF	WOFF2	Winner
File Size	180 KB	60 KB (-67%)	WOFF2
Browser Support	Limited (not optimized)	95%+ (no IE)	WOFF2
Desktop Support	Universal	None	OTF
Compression	None	Brotli (best)	WOFF2
Page Load Speed	Very slow	Very fast	WOFF2
Variable Fonts	Supported	Fully supported	Equal
Core Web Vitals	Poor	Excellent	WOFF2
Best For	Desktop apps	Modern web	Depends

Frequently Asked Questions

Common questions about converting OTF to WOFF2

1Is WOFF2 better than WOFF for OTF fonts?

Yes, significantly. WOFF2 provides 25-30% better compression than WOFF for OTF fonts. A 150KB WOFF becomes approximately 105-112KB as WOFF2. This makes a meaningful difference in page load performance, especially for font-heavy designs.

2Does WOFF2 preserve PostScript outlines from OTF?

Yes, WOFF2 can preserve CFF (PostScript) outlines from OTF fonts. The Brotli compression in WOFF2 works efficiently with PostScript data, often achieving better compression than TrueType-based fonts.

3Should I use WOFF2 exclusively for modern websites?

For most modern sites, yes. WOFF2 covers 95%+ of current browsers. However, if you need IE11 support, provide WOFF as a fallback. Check your analytics – if IE11 is under 1%, WOFF2-only is safe.

4How does OTF to WOFF2 compare to TTF to WOFF2?

Final file sizes are nearly identical. Whether you start with OTF or TTF, WOFF2 compression produces similar results. Use whichever source format you already have – there's no need to convert OTF to TTF first.

5Do variable OTF fonts work with WOFF2?

Yes, OTF variable fonts convert to WOFF2 perfectly. All variation axes, design space, and interpolation data are preserved. Variable fonts benefit especially from WOFF2's superior compression since they're typically large files.

6Can I convert Adobe Fonts (OTF) to WOFF2?

Technically yes, but check your Adobe Fonts license. Adobe's desktop license doesn't automatically grant web font rights. For legal web use of Adobe fonts, use Adobe Fonts' built-in web service or purchase a separate web license.

7What's the best format order: OTF, WOFF, or WOFF2?

For web: Use WOFF2 as primary, WOFF as fallback. List them in your @font-face as: WOFF2, then WOFF. Never use OTF directly on the web – it's uncompressed and slower to load. Keep OTF for desktop use only.

8Does converting OTF to WOFF2 reduce font quality?

No, conversion is completely lossless. All glyphs, curves, hinting, kerning pairs, and OpenType features remain identical. Only the file size changes due to Brotli compression – visual quality is pixel-perfect identical.

File Size Comparison

See how file sizes change after conversion

Original (OTF)	Converted (WOFF2)	Change	Notes
180 KB (OTF)	60 KB (WOFF2)	-67% smaller	Brotli compression excellent for OTF
350 KB (OTF)	105 KB (WOFF2)	-70% smaller	PostScript outlines compress very well
100 KB (OTF)	40 KB (WOFF2)	-60% smaller	Even small OTF sees major reduction
700 KB (OTF)	200 KB (WOFF2)	-71% smaller	Maximum compression for large OTF

Performance Metrics

Technical performance indicators for this conversion

File Size Reduction:60-70%
Brotli compression excellent for both PostScript and TrueType outlines
Page Load Improvement:280-580ms faster
Maximum compression for fastest page loads
Browser Support:95%+ users
Chrome 36+, Firefox 39+, Safari 10+, Edge 14+ (not IE)
Core Web Vitals:+10-20 points
Optimal LCP and CLS from smallest file sizes
Mobile Performance:+35-45%
Best format for mobile performance
Bandwidth Savings:60-70%
Maximum savings for high-traffic sites
Variable Font Support:Full support
WOFF2 fully supports variable fonts from OTF sources

Implementation Examples

Production-ready code for your converted fonts

OTF to WOFF2 Modern Setup

WOFF2-first approach for OTF fonts

@font-face {
    font-family: 'Adobe Garamond Pro';
    src: url('fonts/AGaramondPro-Regular.woff2') format('woff2'),
         url('fonts/AGaramondPro-Regular.woff') format('woff');
    font-weight: 400;
    font-display: swap;
  }

Variable OTF to WOFF2

Variable font from OTF source

@font-face {
    font-family: 'Source Sans Variable';
    src: url('fonts/SourceSans-Variable.woff2') format('woff2-variations');
    font-weight: 200 900;
    font-stretch: 75% 125%;
    font-display: swap;
  }
  
  h2 {
    font-family: 'Source Sans Variable', sans-serif;
    font-weight: 650;
    font-stretch: 110%;
  }

High-Quality Serif Stack

Premium typography with fallbacks

@font-face {
    font-family: 'Freight Text Pro';
    src: url('fonts/FreightTextPro-Book.woff2') format('woff2'),
         url('fonts/FreightTextPro-Book.woff') format('woff');
    font-weight: 400;
    font-display: swap;
  }
  
  body {
    font-family: 'Freight Text Pro', Georgia, 'Times New Roman', serif;
    font-feature-settings: 'liga' 1, 'kern' 1;
  }

Browser Compatibility

Which browsers support WOFF2 fonts

Browser	Support	Notes
Chrome	36+	Supported since 2014
Firefox	39+	Supported since 2015
Safari	10+	Supported since 2016 (macOS Sierra)
Edge	14+	Supported since 2016 (Anniversary Update)
IE	No support	Use WOFF fallback for IE9-11
Opera	23+	Supported since 2014
iOS Safari	10+	iPhone 5 and newer with iOS 10+
Android Browser	5+	Android Lollipop and newer
Chrome Mobile	36+	Full support on modern Android
Samsung Internet	4+	Supported since 2016

Troubleshooting Common Issues

Solutions to problems you might encounter

Font not working in IE11

IE11 doesn't support WOFF2. Provide WOFF as fallback. List formats in @font-face: WOFF2 first (modern browsers), then WOFF (IE11 + older browsers). If you must support IE11, you need both formats.

Variable font lost interpolation data

Ensure your converter explicitly supports variable fonts. Check if the original OTF is truly a variable font using a font inspector. Variable fonts require special handling during WOFF2 compression to preserve variation axes and design space.

Compression not as good as expected

Some OTF fonts are already optimized and compress less. Simple fonts with few glyphs see smaller benefits. Expected reduction: 60-70%. For additional savings, subset the font to include only needed characters (can save another 30-70%).

Adobe Font license prevents web use

Adobe's desktop font license doesn't grant web rights. For legal web use of Adobe fonts: (1) Use Adobe Fonts' web service, (2) Purchase separate web license, or (3) Use free alternatives. Converting doesn't change license restrictions.

PostScript outlines not preserved

Some converters convert CFF (PostScript) to TrueType during WOFF2 compression. This is lossless visually but changes curve format. If preserving PostScript outlines is critical, verify your converter supports WOFF2-CFF (less common but exists).

When NOT to Use WOFF2

Scenarios where you should keep OTF or choose a different format

Must support IE11
Why not: IE11 doesn't support WOFF2; you need WOFF fallback
Use instead: Create both WOFF2 (modern) and WOFF (IE11) versions
Desktop application use
Why not: WOFF2 is web-only; desktop software cannot use WOFF2
Use instead: Keep OTF for desktop; convert to WOFF2 only for web
Font editing workflow
Why not: WOFF2 is delivery format; editing needs OTF source
Use instead: Maintain OTF as source; generate WOFF2 for production only
Adobe font licensing
Why not: Desktop licenses often don't include web rights
Use instead: Use Adobe Fonts service or purchase separate web license

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