TTF to WOFF Converter
Convert TTF and OTF font files to WOFF format online for free. Our ttf to woff converter compresses each font table with DEFLATE level 9, typically achieving 20-40% size reduction compared to the original TTF. Upload multiple fonts at once - single files download directly, multiple files are packaged as a ZIP. All processing happens in your browser using fflate. No signup required.
Convert TTF to WOFF
Upload your TTF or OTF font files, click "Convert to WOFF", and download web-optimized WOFF files - all processing happens locally in your browser using DEFLATE compression. Multiple files download as a ZIP. Your fonts never leave your device.
Why Use Our TTF to WOFF Converter?
Instant TTF to WOFF Conversion in Your Browser
Convert TTF to WOFF directly in your browser using DEFLATE compression - no server upload, no cloud processing, no waiting. Our ttf to woff converter processes your fonts entirely on your device.
Secure TTF to WOFF Converter Online
Your font files never leave your device. 100% client-side processing means complete privacy - no cloud storage, no server logs, no data exposure when you convert ttf to woff online.
TTF to WOFF Online - No Installation
Convert TTF to WOFF directly in your browser with no software downloads, no plugins, and no account required. Works on any modern browser on Windows, macOS, and Linux.
Batch Convert Multiple TTF Files
Upload and convert multiple TTF or OTF font files at once - all converted WOFF files are packaged into a single ZIP archive for instant download. No file size limits.
When to Convert TTF to WOFF
Web Font Delivery Optimization
Convert TTF to WOFF for web font delivery - WOFF files are 20-40% smaller than TTF and are supported by all modern browsers. Using WOFF instead of TTF directly reduces page load time and improves Core Web Vitals LCP scores.
WordPress and CMS Custom Fonts
Convert TTF to WOFF before uploading custom fonts to WordPress, Webflow, or Squarespace. Most CMS platforms require WOFF format for self-hosted fonts, and converting ttf to woff ensures maximum browser compatibility.
React, Next.js, and SPA Projects
Convert TTF to WOFF for use with @font-face declarations in React, Next.js, Vue, and Angular projects. WOFF is the recommended format for the next/font and @font-face CSS rule for optimal loading performance.
GDPR-Safe Self-Hosted Fonts
Convert TTF to WOFF to self-host fonts instead of loading them from Google Fonts or Adobe Fonts - eliminating third-party requests that may violate GDPR. Self-hosting WOFF fonts gives you full control over font delivery.
Shopify and E-Commerce Themes
Convert TTF to WOFF for Shopify theme custom fonts - Shopify requires WOFF format for font assets uploaded to the theme. Converting ttf to woff online ensures your brand fonts load correctly on all storefronts.
Email Template Custom Fonts
Convert TTF to WOFF for use in HTML email templates - some email clients support WOFF fonts via @font-face declarations. Converting ttf to woff reduces the embedded font size and improves email load times.
Understanding TTF to WOFF Conversion
What is TTF to WOFF Conversion?
TTF (TrueType Font) is a raw font format that stores glyph outlines, hinting instructions, and metadata as uncompressed binary data. WOFF (Web Open Font Format) is a container format designed specifically for web delivery - it wraps the same font tables as TTF but compresses each table individually using DEFLATE compression, typically achieving 20-40% size reduction. Our ttf to woff converter reads the TTF binary structure, compresses each font table with DEFLATE level 9 using fflate, and writes a spec-compliant WOFF 1.0 file - all entirely in your browser with no server upload.
How Our TTF to WOFF Converter Works
- 1Upload your TTF or OTF files: Drag and drop one or more font files onto the drop zone. The files are read as binary data in your browser - no data is sent to any server. Both TrueType (TTF) and OpenType CFF (OTF) fonts are supported.
- 2Click "Convert to WOFF":The converter parses the sfnt font structure, reads each font table (glyf, cmap, hmtx, etc.), compresses each table with DEFLATE level 9, and assembles a spec-compliant WOFF 1.0 file. Tables that don't compress well are stored uncompressed per the WOFF spec.
- 3Download your WOFF files: Single files download directly. Multiple files are packaged into a ZIP archive. The results panel shows original size, output size, and reduction percentage for each font.
What Gets Compressed During TTF to WOFF Conversion
- Glyph Data (glyf/CFF table): The largest table in most fonts - contains the actual outline data for every character. DEFLATE compression typically reduces this table by 30-50%.
- Hinting Instructions (cvt, fpgm, prep tables): TrueType hinting bytecode that controls rendering at small sizes - compresses well due to repetitive instruction patterns.
- Character Map (cmap table): Maps Unicode codepoints to glyph IDs - compressed along with all other font tables in the WOFF container.
- Metrics and Layout Tables (hmtx, kern, GPOS, GSUB): Horizontal metrics, kerning pairs, and OpenType layout features - all compressed individually per the WOFF 1.0 specification.
WOFF vs WOFF2 - What is the Difference?
WOFF uses DEFLATE compression (the same algorithm as ZIP and GZIP) and is supported by all browsers including Internet Explorer 9+. WOFF2 uses Brotli compression and a specialized font-aware transform that achieves an additional 20-30% size reduction over WOFF - but requires a WASM-based Brotli encoder to produce in the browser. Our converter produces spec-compliant WOFF 1.0 files using DEFLATE, which are supported by 100% of modern browsers and are the recommended fallback format alongside WOFF2 in @font-face declarations.
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Frequently Asked Questions About TTF to WOFF Converter
A TTF to WOFF converter is a tool that transforms TrueType font files (.ttf) into WOFF (Web Open Font Format) files (.woff) - a compressed container format designed for web delivery. Our free ttf to woff converter online works entirely in your browser using DEFLATE compression via fflate. Your font files are never uploaded to any server.
WOFF files are 20-40% smaller than TTF because each font table is compressed with DEFLATE. Smaller font files mean faster page loads, better Core Web Vitals scores, and lower bandwidth costs. WOFF is supported by all modern browsers and is the standard format for self-hosted web fonts.
Absolutely. Our ttf to woff converter processes everything locally in your browser using the FileReader API and fflate. Your font files are never uploaded to any server, never stored, and never leave your device. All conversion happens entirely on your machine.
Yes - 100% free, forever. No signup, no account, no premium tier, no file size limits, and no ads interrupting your workflow. Just upload your TTF files, convert, and download.
WOFF uses DEFLATE compression and is supported by all browsers including IE9+. WOFF2 uses Brotli compression with a font-aware transform, achieving an additional 20-30% size reduction over WOFF. Our converter produces WOFF 1.0 files - the recommended fallback format. For WOFF2, you can use a desktop tool like fonttools or the Google woff2 encoder.
No - WOFF is a lossless format. Converting TTF to WOFF does not change any glyph outlines, hinting instructions, or font metrics. The font renders identically in the browser whether loaded as TTF or WOFF. The only difference is file size.
Yes - our converter supports both TrueType (TTF) and OpenType CFF (OTF) fonts. Both formats use the same sfnt container structure and can be wrapped in a WOFF container. The output is a WOFF file regardless of whether the input was TTF or OTF.
Add the WOFF file to your project and reference it in your CSS: @font-face { font-family: "MyFont"; src: url("myfont.woff") format("woff"); }. For best browser coverage, include both WOFF2 and WOFF: src: url("myfont.woff2") format("woff2"), url("myfont.woff") format("woff");
Since conversion runs entirely in your browser, the practical limit depends on your device's available RAM. Most modern devices handle font files up to 50 MB without issues. Variable fonts and large CJK fonts with thousands of glyphs may take a few seconds to convert.