Font Compression Comparison
Upload a TTF or OTF font and compare file sizes across TTF, WOFF, WOFF2, and subsetted WOFF2 side by side — with a download button for each format. Runs entirely in your browser with no signup required.
Upload a TTF or OTF font and compare file sizes across TTF, WOFF, WOFF2, and subsetted WOFF2 — with a download button for each format. Runs entirely in your browser. Your font never leaves your device.
Drop your TTF or OTF font here
or click to browse
.ttf and .otf font files are supported
Why Use Our Font Compression Comparison Tool?
Instant Side-by-Side Comparison
See TTF, WOFF, WOFF2, and subsetted WOFF2 sizes side by side in seconds — with a visual bar chart and exact byte counts for each format.
Secure Font Compression Comparison Online
Your font file never leaves your device. All compression and analysis run locally in the browser sandbox — complete privacy for proprietary or licensed fonts.
Download Every Format
Every format in the comparison has a download button — get the TTF, WOFF, or WOFF2 version of your font directly from the results panel.
100% Free Forever
Compare as many fonts as you need, completely free. No account, no subscription, no watermarks, and no file size limits on your comparisons.
Common Use Cases for Font Compression Comparison
Choosing the Right Web Font Format
Use the font compression comparison to decide whether WOFF or WOFF2 is worth the conversion effort for your specific font — see the exact size difference before committing.
Core Web Vitals Audit
Quantify exactly how much bandwidth your font is consuming in each format — use the comparison data to justify switching to WOFF2 in your performance audit report.
Design System Font Decisions
Compare compression ratios for all fonts in your design system before packaging — choose the format that minimises bundle size for component library consumers.
Font Subsetting ROI Analysis
See the estimated size of a Latin-only subset vs the full WOFF2 — quantify the savings before investing time in a full subsetting workflow.
Custom Font Evaluation
Evaluate a custom or purchased font before deploying it — compare its compression characteristics against standard web fonts to set realistic performance expectations.
Self-Hosting Migration Planning
When migrating from Google Fonts CDN to self-hosting, use the comparison to determine the optimal format and estimate the bandwidth savings per page view.
Understanding Font Compression Formats
What is Font Compression Comparison?
Font compression comparison is the process of encoding the same font in multiple web formats — TTF, WOFF, WOFF2, and subsetted WOFF2 — and measuring the resulting file size for each. This lets you make an informed decision about which format to serve on your website. Our free font compression comparison tool performs all four conversions in your browser and shows the results side by side with a visual bar chart and download button for each format.
How Our Font Compression Comparison Works
- Upload Your Font: Drag and drop or click to select any TTF or OTF font file from your device.
- Browser-Based Compression:Click "Compare Formats" — the tool builds WOFF (DEFLATE), WOFF2 (Brotli), and a Latin subset estimate in parallel, entirely in your browser. Your font never leaves your device.
- Download Any Format: Each format in the comparison has a download button — get the exact file you need directly from the results panel.
What Each Format Provides
- TTF / OTF: Raw sfnt binary with no compression — maximum compatibility but largest file size. Use as a last-resort fallback only.
- WOFF: DEFLATE-compressed font container — 20–40% smaller than TTF. Supported by all browsers including IE9+. Good fallback for WOFF2.
- WOFF2: Brotli-compressed font container — 30–50% smaller than TTF. The recommended format for all modern web projects.
- WOFF2 (Latin Subset): Estimated size for a Latin-only subset — typically 60–80% smaller than the full TTF. Actual size depends on your character set and subsetting tool.
Completely Local & Secure
Data security is fully protected because the font compression comparison tool operates entirely client-side inside your browser sandbox. The font binary is loaded into local memory, compressed using fflate (DEFLATE) and the browser's native CompressionStream API (Brotli), and the results are displayed locally. No font bytes are ever transmitted to any remote server.
Related Tools
JSON Key Shortener
Shorten verbose JSON keys to single letters or abbreviated forms — shows size reduction and provides a downloadable key mapping file for restoration. Free online JSON key shortener.
JSON vs MessagePack Size Comparison
Compare JSON byte size vs MessagePack encoding for any payload — shows exact savings, type-by-type breakdown, and MessagePack hex preview. Free online JSON vs MessagePack comparison.
String Decompressor (GZIP/LZ)
Decompress GZIP+Base64, DEFLATE+Base64, and LZ-String compressed payloads back to readable text — supports all three LZ-String variants. Free online string decompressor.
ZIP File Extractor
Extract files from any ZIP archive client-side — browse contents, preview text files, download individual files or all at once. Free online ZIP extractor, no signup required.
Frequently Asked Questions About Font Compression Comparison
A font compression comparison tool encodes the same font in multiple web formats — TTF, WOFF, WOFF2, and subsetted WOFF2 — and shows the file size for each side by side. Our free online font compression comparison tool runs entirely in your browser with no signup required.
Use WOFF2 as your primary format — it achieves the best compression (30–50% smaller than TTF) and is supported by all modern browsers. Provide WOFF as a fallback for older browsers. Avoid serving raw TTF/OTF on the web as they are significantly larger.
Yes, complete privacy is guaranteed. All compression and analysis run entirely client-side in your browser. Your font file never leaves your device and is never uploaded to any server — which is especially important for licensed or proprietary typefaces.
Yes. The font compression comparison tool is 100% free with no signup, no subscription, no file size limits, and no watermarks on your output. You can compare as many fonts as you need.
WOFF uses DEFLATE compression and achieves 20–40% size reduction vs TTF. WOFF2 uses Brotli compression and achieves 30–50% size reduction — consistently smaller than WOFF. WOFF2 is the recommended format for all modern web projects. WOFF is only needed as a fallback for Internet Explorer 11.
Real font subsetting requires parsing the font's glyph table and removing specific glyphs — which requires a full font parser. Our tool estimates the Latin subset size by compressing approximately 38% of the font data, which approximates the proportion of Latin glyphs in a typical multi-script font. The actual size will vary depending on the font and your specific character set.
Yes. Every format in the comparison results has a download button. Click the ".woff", ".woff2", or ".ttf" button next to any format to download that version of your font directly from the results panel.
Brotli compression via the CompressionStream API requires Chrome 80+, Edge 80+, or Safari 17.4+. If your browser does not support it, the tool falls back to DEFLATE compression. The output is still a valid WOFF2 file, but the compression ratio will be slightly lower. For full Brotli support, use Chrome or Edge.