Image Compress/Convert
Compress and convert images to WebP/AVIF locally
Inputs
Drag & drop images here, or click to select
Higher quality increases file size; try 70–85 for good balance.
Ready.
Results
Before/After sizes shown after processing. Use Download .zip to save all optimized files.
How it works
Images never leave the device. The browser decodes each image into a hidden canvas, re‑encodes to WebP or AVIF with the chosen quality, and reports size savings before enabling downloads.
- WebP encoding is widely supported via Canvas/OffscreenCanvas toBlob/convertToBlob.
- AVIF encoding support varies by engine; if unavailable, the app falls back to WebP.
- ZIP is created client‑side to download all optimized images at once.
FAQ
Are images uploaded?
No. All work is local in the browser; nothing is sent over the network after initial load.
Why AVIF fallback?
Some browsers cannot encode AVIF from Canvas/OffscreenCanvas yet; the app automatically falls back to WebP to ensure a working output.
What quality should be used?
Start around 75–85 for photos; adjust lower for more savings or higher for quality‑critical images.
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