What this does
Converts PNG images to WebP right in your browser — typically 60–80% smaller for graphics and screenshots, with transparency intact. Drop up to 20 files, set the quality, download the results.
Why WebP for websites?
WebP was designed for exactly this job: web delivery. Compared to PNG it compresses far more aggressively, and unlike JPG it keeps the alpha channel, so it's the natural upgrade for logos, illustrations, UI assets, and screenshots that currently ship as PNG. Smaller images mean faster Largest Contentful Paint, which feeds directly into Core Web Vitals.
Is WebP safe to use everywhere now?
Every browser released since 2020 — Chrome, Firefox, Safari 14+, Edge — decodes WebP natively, so for websites the answer is yes. The places you may still hit friction are outside the browser: some older desktop software, document templates, and print workflows want PNG or JPG. For those, keep a PNG master and convert copies.
Lossy or lossless — what does the quality slider do here?
This tool uses your browser's WebP encoder in lossy mode, with the slider controlling how aggressively detail is traded for size. For graphics with flat colors, even 80 looks identical to the source. If you need bit-exact output (e.g. archival or further editing), stick with the original PNG — the conversion is meant for the copy you publish.
Does transparency survive the conversion?
Yes — that's the main reason to pick WebP over JPG for PNGs. Soft shadows and anti-aliased edges in the alpha channel come through correctly.
Is my data private?
Yes. The encoding happens in your browser via the canvas API; image bytes never leave your machine.