How much can SVG files be compressed?

SVGs exported from Figma, Illustrator, or Sketch typically shrink 40–80% because exporters embed editor metadata, hidden layers, and redundant precision. Hand-written SVGs see smaller gains, usually 5–20%.

Is SVG compression lossless?

Yes — SVGO's default preset only removes data that doesn't affect rendering: editor metadata, comments, empty groups, and excess decimal precision in path coordinates. The visual result is identical.

Will my SVG still scale and animate after optimization?

Yes. FileSlim's SVGO config preserves viewBox, IDs referenced by CSS or scripts, and animation attributes. The optimized SVG remains fully scalable and interactive.

Does this run on the server?

No. SVGO is bundled as WebAssembly-free JavaScript and runs entirely in your browser. Your files are never uploaded.

Can I compress multiple SVGs at once?

Yes — drop multiple .svg files in one go. Each is optimized independently and ready to download.

Last Updated: September 12, 2026

Compress SVG Online Free

Reduce SVG file size with SVGO — the industry-standard optimizer used by Figma, Sketch, and most build tools. Runs in your browser. No upload, no signup.

Juraj Cukan

Founder, CEO & Lead Developer

Student, Comenius University - Faculty of Mathematics, Physics and Computer Science

Full-Stack Developer

Compression Algorithm Specialist

50M+ Files Processed

Juraj is a Computer Science student at Comenius University in Bratislava, Slovakia, and the sole creator of FileSlim. Frustrated with inefficient and expensive compression tools, he built FileSlim from the ground up as a free, privacy-first alternative. Working entirely alone, Juraj developed every aspect of the platform—from the compression algorithms to the user interface—ensuring complete browser-based processing that never uploads files to servers. His work has helped users worldwide compress over 50 million files while maintaining complete privacy and achieving 60-90% file size reductions.

Quick Answer

SVG is XML, so optimization is text-level: SVGO strips editor metadata (Illustrator/Sketch/Figma tags), comments, hidden layers, and trims path coordinate precision. The rendered image is pixel-identical.

— How does SVG compression work?

40-80%

Typical reduction

None

Quality loss

Never

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Why Optimize SVG?

Faster page loads

Smaller inline SVGs mean smaller HTML, faster First Contentful Paint, and less work for the browser parser.

Cleaner markup

SVGO removes Figma/Illustrator junk so the SVG is easy to read, style with CSS, and animate.

Private by default

Everything runs locally in your browser via JavaScript. Your SVGs never leave your device.

What FileSlim's SVG Optimizer Removes

Editor metadata from Figma, Adobe Illustrator, Sketch, and Inkscape
XML comments, doctype declarations, and processing instructions
Empty groups, unused defs, and hidden layers
Default attribute values and redundant transforms
Excess decimal precision in path coordinates

Preserved: viewBox (so scaling still works), IDs referenced by CSS/JS, ARIA attributes, and animation tags.

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