SVGym optimize your own SVG (100% local)
Optimize SVGs beyond SVGO, verified, 100% in your browser
SVGym optimize your own SVG (100% local) launched on June 26, 2026 with 5 votes, #2,466 of 22,646 launches that month and more than 75% of that year's launches.
What it does
SVGym is an open-source (MIT) SVG optimizer that goes beyond SVGO. It verifies every change by rendering the image before and after each step and reverting anything that drops visual quality, so files come out smaller but never broken, with hover states, animations, and media queries preserved. The browser tool runs entirely on your device (nothing is uploaded), and the CLI optimizes single files or whole icon folders into a sprite sheet.
Compress an SVG beyond SVGO entirely in your browser. Nothing is uploaded.
The deterministic pipeline runs entirely in your browser , verifying every change against your browser's own rendering. Lossless: structurally identical. Conservative: SSIM ≥ 0.99 (visually identical). Aggressive: SSIM ≥ 0.97 (pushes harder). Every step is rendered and reverted if it drops below the bar. (The optional AI mode and the SVGO pre-pass are CLI-only; this is the deterministicfrom maziars.github.io
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