📐
Optimize Source Sans Pro
Quick-start guide for optimal results
92%
Size Reduction
180KB
Before
15KB
After
-350ms
LCP Improvement
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Upload & Configure
Drop the .ttf file below. Sift will auto-detect the 2 variable axes.
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Recommended Settings
Subset: Latin (covers English, most European languages)
Weight: Keep 200-900 range (or instance to specific weights)
Format: WOFF2 (30% smaller than WOFF)
💡 Use the Source family
Pair with Source Serif Pro for body text and Source Code Pro for code to create a cohesive design system.
Upload Source Sans Pro
Reduce file size by up to 94%. Instance axes, subset glyphs, export WOFF2.
100% client-side — your fonts never leave your browser.
Drag & drop your font here
or click to browse
ttfotfwoff2
Max file size: 5MB