How to Convert Images Between WebP, JPEG, and PNG

The container you save an image in decides three things at once: file size, whether transparency survives, and how sharp edges and text hold up. A screenshot saved as JPEG picks up fuzzy halos around text because JPEG is lossy and was tuned for photographs, not flat color. That same screenshot as PNG stays crisp but can be several times larger.

WebP is the modern middle ground. It supports both lossy and lossless modes plus transparency, and it usually beats JPEG and PNG on size at comparable quality. The catch is compatibility: while every current browser reads WebP, some older desktop apps, email clients, and legacy tools still choke on it, so JPEG and PNG remain the safe interchange formats.

The Image Converter does its work locally using your browser and your device's own processor. Your photos are decoded, re-encoded, and handed back to you without ever being sent to a server. Nothing is uploaded, nothing is stored on someone else's machine, and there is no account to create.

That matters for anything sensitive: ID scans, medical images, contracts, product shots under embargo, or simply personal photos you would rather not hand to a random web service. Because the processing is local, it also keeps working if your connection drops after the page has loaded, and there are no per-file limits imposed by a backend.

The workflow is built for more than one file at a time, so you can drop an entire folder of screenshots or camera exports and convert them in a single pass.

A smaller output is not automatically a better one. When you convert a PNG logo to JPEG the file shrinks, but you also lose the transparent background and gain compression artifacts around the edges. When you convert a photo to lossless PNG the file often grows because PNG was never meant to compress photographic detail.

Use the comparison as a decision tool, not a scoreboard. For photos headed to the web, lossy WebP or a moderate-quality JPEG usually wins. For anything with text, sharp lines, or transparency, prefer PNG or lossless WebP even when the number is larger. Converting from a lossy source to another lossy format also stacks damage, so keep an original copy whenever you can.