What formats can I convert to WOFF?

You can convert from any major font format including TTF, OTF, WOFF, WOFF2, EOT, SVG, DFont, and PFB to WOFF. Our converter automatically detects the source format.

Is WOFF the best format for my use case?

Web Open Font Format (WOFF) is widely supported across all browsers including legacy versions. Choose the format that best matches your target platform and requirements.

Will conversion affect font quality?

Converting to WOFF uses lossless compression, so the font outlines and glyphs remain identical. Only the file size changes.

Can I convert multiple fonts at once?

Yes, use our batch conversion feature to upload multiple font files and convert them all to your target format simultaneously. You can also export to multiple formats at once.

What CSS code will I get?

We automatically generate @font-face CSS code for your WOFF files. This includes proper format declarations and fallbacks for optimal browser support.

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WOFF Converter - Convert Any Font to WOFF Online for Free

Transform fonts from TTF, OTF, WOFF2, EOT, SVG, DFONT, PFB to Web Open Font Format format instantly. Free, fast, and completely private.

50 MB File SizeSecurely100% FreeFastPrivateInstant Processing

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Drag and drop your font files here or click to browse

Supports TTF, OTF, WOFF2, EOT, SVG, DFONT, PFB

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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

About Web Open Font Format

Everything you need to know about WOFF fonts

Target Format

Web Open Font Format

Web Open Font Format (WOFF) is specifically optimized for web use with built-in compression. It's supported by all modern browsers and is ideal for websites. WOFF files are typically 40% smaller than their TTF/OTF equivalents.

Why Convert to WOFF?

Deploying fonts for web applications with broad browser support

Reducing font file sizes for improved website performance

Ensuring compatibility with browsers from IE9 onwards

Creating web font kits for responsive design projects

How to Convert Font to WOFF

Simple 3-step process that takes less than a minute

Upload Your Font

Select your font file from any supported format (TTF, OTF, WOFF2, EOT, SVG, DFONT, PFB) 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 WOFF file will be ready immediately. Download it and use it in your project.

Frequently Asked Questions

Common questions about converting to WOFF

1Does converting your font to WOFF reduce quality?

No, converting TTF to WOFF does not reduce quality. WOFF uses lossless compression, meaning the font outlines, glyphs, and visual appearance remain identical to the original TTF file. The only difference is file size – WOFF compresses the data without altering the font's design, metrics, or rendering quality.

2What file size reduction should I expect?

You can expect a file size reduction of 40-60% when converting TTF to WOFF. For example, a 150KB TTF file typically compresses to around 60-90KB as WOFF. The exact reduction depends on the font's complexity and the amount of metadata it contains.

3Do WOFF fonts work in all browsers?

WOFF fonts work in all modern browsers and most older ones. Support includes Chrome 36+, Firefox 39+, Safari 5.1+, Edge (all versions), and Internet Explorer 9+. The only browsers that don't support WOFF are IE8 and earlier, which require EOT format instead.

4Will my font's OpenType features work after conversion?

Yes, all OpenType features are preserved during TTF to WOFF conversion. This includes ligatures, kerning pairs, alternate glyphs, small caps, and other advanced typography features. WOFF is simply a compressed wrapper around the original font data, so all features remain intact.

5Can 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 TTF doesn't automatically grant web usage rights. Always check your license agreement or contact the foundry.

6How is this different from WOFF2?

WOFF2 is the next generation of web font compression and offers significantly better compression than WOFF – typically 30% smaller file sizes. While WOFF uses gzip compression, WOFF2 uses Brotli compression. However, WOFF2 isn't supported in IE11 or older browsers, making WOFF a better choice if you need broader compatibility.

File Size Examples

See how file sizes change when converting to WOFF

Original	Converted (WOFF)	Change	Notes
150 KB (TTF)	75 KB (WOFF)	-50% smaller	Typical gzip compression for web fonts
300 KB (TTF)	140 KB (WOFF)	-53% smaller	Larger fonts compress well
80 KB (TTF)	45 KB (WOFF)	-44% smaller	Smaller fonts compress less efficiently
600 KB (TTF)	260 KB (WOFF)	-57% smaller	Extended character sets compress better

Performance Benefits

Key performance metrics for WOFF format

File Size Reduction:40-60%
WOFF typically 40-60% smaller than TTF due to gzip compression
Page Load Improvement:200-400ms faster
Smaller file size reduces download time on 3G/4G connections
Browser Support:99%+ users
Works in all browsers from 2011+ (IE9+, Chrome 6+, Firefox 3.6+)
Compression Time:<1 second
Fast conversion with gzip compression algorithm
Render Blocking:Same as TTF
Both block rendering; use font-display: swap to prevent FOIT
Cache Efficiency:Excellent
Smaller files mean better CDN/browser cache utilization

Implementation Examples

Production-ready code for WOFF fonts

Basic WOFF with TTF Fallback

Standard implementation for maximum compatibility

@font-face {
    font-family: 'Roboto';
    src: url('fonts/Roboto-Regular.woff') format('woff'),
         url('fonts/Roboto-Regular.ttf') format('truetype');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
  }
  
  body {
    font-family: 'Roboto', Arial, sans-serif;
  }

Multiple Weights with WOFF2 + WOFF

Modern approach with WOFF2 primary, WOFF fallback

@font-face {
    font-family: 'Open Sans';
    src: url('fonts/OpenSans-Regular.woff2') format('woff2'),
         url('fonts/OpenSans-Regular.woff') format('woff');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
  }
  
  @font-face {
    font-family: 'Open Sans';
    src: url('fonts/OpenSans-Bold.woff2') format('woff2'),
         url('fonts/OpenSans-Bold.woff') format('woff');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
  }
  
  h1 {
    font-family: 'Open Sans', Helvetica, sans-serif;
    font-weight: 700;
  }

Browser Compatibility

Which browsers support WOFF fonts

Browser	Support	Notes
Chrome	6+	Full support since 2010
Firefox	3.6+	Full support since 2010
Safari	5.1+	Full support since 2011
Edge	All versions	Full support
IE	9+	No support in IE8 and below
Opera	11.1+	Full support since 2011
iOS Safari	5+	Full support on all modern iOS
Android Browser	4.4+	Full support since 2013
Chrome Mobile	All versions	Full support
Samsung Internet	All versions	Full support

Troubleshooting Common Issues

Solutions to problems when converting to WOFF

Font looks different or spacing seems off

This is usually a browser rendering difference, not a conversion issue. Verify by comparing both fonts at the same size in the same browser. Ensure your @font-face declaration matches the font's actual weight and style (font-weight: 400 for regular, 700 for bold).

Missing characters or symbols

Check the original TTF file to confirm it contains those characters using a font viewer tool. Remove any unicode-range declarations from your CSS during testing. Some fonts have limited character sets that don't include special symbols or non-Latin scripts.

Browser not loading the WOFF font

Common causes: (1) CORS restrictions if loading from CDN - configure Access-Control-Allow-Origin header, (2) Incorrect MIME type - server should send Content-Type: font/woff, (3) Wrong file path in @font-face src, (4) CSP (Content Security Policy) blocking font resources. Check browser console for specific errors.

Conversion fails or produces corrupt file

The original TTF might be corrupted, have DRM protection, or use a malformed font structure. Try opening the TTF in a font viewer (FontForge, Font Book) to verify it's valid. Test with a different, known-good TTF file to isolate whether it's a file issue or tool issue.

Performance issues or slow loading

If fonts load slowly: (1) Use font subsetting to include only needed characters (can reduce size by 70%), (2) Add font-display: swap to prevent render-blocking, (3) Preload critical fonts with <link rel="preload" as="font" type="font/woff">, (4) Host fonts on CDN for faster delivery.

When NOT to Use WOFF

Scenarios where WOFF might not be the best choice

Desktop application use
Why not: WOFF is web-only; desktop apps (Photoshop, Word, etc.) cannot use WOFF files
Use instead: Keep TTF for desktop use; only convert to WOFF for websites
You need the smallest web font
Why not: WOFF is good but WOFF2 is 25-30% smaller with better compression
Use instead: Convert to WOFF2 instead for modern browsers, use WOFF as fallback only
Font editing required
Why not: WOFF is a delivery format; font editing software needs TTF or OTF
Use instead: Keep TTF for editing; generate WOFF only for final web deployment
Offline/embedded use
Why not: Embedded systems and kiosks often need uncompressed TTF files
Use instead: Keep TTF for embedded systems; use WOFF only for web delivery

Popular Conversions

Common conversion paths to WOFF

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