The Smart Image Optimizer is for people who don't want to think about codecs. Drop anything — HEIC from an iPhone, PNG screenshots, huge camera JPEGs, GIFs, AVIFs — and the tool auto-picks the best modern web format for each file (WebP for photos and most content, PNG for small graphics with hard-edged transparency), then applies our production-grade encoder pipeline. No preset to pick, no quality slider to tune, no format to choose. Everything runs in your browser, files never upload, and you get back a zip of production-ready assets that will score green on PageSpeed Insights.
How the smart pick works
For each file, the optimizer looks at pixel dimensions, alpha channel presence, and input format, then picks the best modern web format: WebP for photos, hero images, and most content (best perceptual quality per byte in 2026); PNG optimized with oxipng for small graphics with hard-edged transparency like icons and UI cutouts. AVIF is not the default because Safari on iOS below 16.1 still doesn't support it — WebP has near-universal coverage in 2026 and is the safer default for "just make it work everywhere." If you specifically want AVIF, use our dedicated Convert to AVIF tool.
When to use this vs. a dedicated converter
Use the Smart Optimizer when you have mixed content and want the tool to make good decisions for you: a marketing folder with photos, screenshots, and product cutouts; a blog post's image assets; anything where you don't want to think per-file. Use a dedicated converter (Convert to WebP, Convert to AVIF, Convert to JPEG) when you need a specific format for a downstream tool or want tighter manual control over quality per file.
Best-in-class encoders under the hood
The optimizer uses the same production-grade encoder pipeline as our dedicated converter tools — no shortcuts. WebP encoding uses method 6 (max effort), 6-pass rate distortion, sharp YUV conversion, and SNS strength 80. PNG output goes through oxipng at max effort. Result: files that are 30–70% smaller than the source with no visible quality loss on retina displays.
Everything runs in your browser
The optimizer loads MozJPEG, libwebp, oxipng, and libavif as WebAssembly and processes files entirely locally. Files never appear in a network request, are never written to any server, and are never seen by any log. Open the browser Network tab while you drop a batch — zero requests fire. That means private photos, unreleased designs, medical images, and confidential client mocks are all safe to optimize.