Compress Images to WebP & AVIF Online — Free Batch Optimizer
Convert and compress JPEG, PNG, and GIF images to WebP or AVIF for maximum web performance. Batch-process up to 10 files client-side with live size estimation. No upload needed.
wsotoolz.com
Bulk crop, compress, and convert up to 10 images simultaneously. Fast, private, 100% client-side.
Drag and drop images here
or click to select — JPG, PNG, WebP, AVIF, SVG, HEIC, ICO · up to 10 at once
Or press Ctrl+V · ⌘V to paste an image directly from your clipboard
Frequently Asked Questions
What is the difference between WebP and AVIF compression?
WebP delivers 25–35% smaller files than JPEG at equivalent visual quality and is supported by all modern browsers. AVIF is the next-generation codec offering 40–55% reduction over JPEG, but with slightly higher encoding time. Use WebP for broad compatibility; use AVIF when maximum compression is the priority.
How much can I reduce my image file size without visible quality loss?
For most photos, a quality setting of 80–88% in WebP or 70–82% in AVIF is visually lossless. The live "EST." indicator in the stats bar shows the estimated output size in real time so you can tune quality before exporting.
Can I convert a batch of images all at once?
Yes. Drop up to 10 images simultaneously, set your target format and quality once, then enable "Apply to all" to propagate settings. Download all compressed outputs as a single ZIP archive in one click.
Does compressing to WebP affect image dimensions?
No. Format conversion preserves the original pixel dimensions. If you also want to resize, select a target aspect ratio using the preset chips before exporting.
Is there a file size limit for compression?
Processing is limited by your browser's available memory. Images up to 20 MP process reliably in most modern browsers. For very large RAW files, downscale first using the crop presets.