Image Converter
Convert between WebP, JPG and PNG, resize, and squeeze the file size down. Batch as many as you like. Runs in your browser, so nothing is uploaded.
Your images?JPG, PNG, WebP, GIF and BMP in. JPG, PNG or WebP out. Conversion uses your browser's own image encoder, so nothing is uploaded.
Drop in a batch and convert them all at once.
Output
Applies to every image.
Which format should I pick?
A short, practical answer.
WebP for websites
Typically 25 to 35 percent smaller than JPG at the same visual quality, and supported by every current browser. The right default for anything going online.
JPG for compatibility
Opens everywhere, including old software, printers and photo kiosks. Choose it when the file is leaving your control.
PNG for sharp edges
Lossless, and the only one here that keeps transparency. Ideal for logos, screenshots and diagrams, but large for photographs.
Which format to convert to, and when
Four formats cover essentially everything, and the choice is decided by what the file is for rather than by which is technically best.
WebP is the default for anything going on a website. It compresses photographs about as well as a modern JPG, handles flat graphics about as well as PNG, and keeps transparency either way. Expect files 25 to 35 percent smaller than the PNG equivalent, which on an image-heavy page is often the difference between passing and failing Core Web Vitals. Every current browser supports it.
JPG is the format for compatibility. Every piece of software written in the last thirty years reads it. It has no transparency, so transparent areas are filled with white, and it is lossy, so repeated re-saving accumulates damage. Use it for photographs that are finished and going somewhere out of your control.
PNG is lossless, which is exactly right for screenshots, diagrams, logos and anything with sharp text or a transparent background, and exactly wrong for photographs — a PNG of a holiday snap is routinely five to ten times the size of the JPG for no visible gain.
HEIC is what an iPhone produces. It is excellent and almost nothing outside the Apple ecosystem reads it, which is why converting is usually the first thing anyone does with one. That conversion needs a decoder, so it lives on the dedicated HEIC to JPG and HEIC to PNG pages rather than here.
On quality: 80 to 85 is the sweet spot for photographs in a lossy format, and the point at which most people stop being able to tell. Push lower and you will see it first in gradients, skies and skin tones. The one thing to protect is small text, because lossy compression smears letter edges at any quality, so screenshots of code and labelled diagrams should stay lossless.