Shrink bulky PNGs into compact JPGs — the conversion runs on your own device, so your images stay with you.
PNG uses lossless compression, which keeps every pixel intact but handles photographs poorly. A screenshot of a chart compresses well; a 12-megapixel photo saved as PNG can easily reach 20–30 MB. JPG was designed for photographic content and routinely cuts that same image to a tenth of the size with little visible difference at normal viewing. That matters when an upload form caps attachments at 5 MB, or an email bounces because the attachment is too heavy.
When you drop a PNG here, your browser decodes it, redraws it onto a canvas inside a Web Worker — a background thread that keeps the page from freezing — and re-encodes the pixels as a JPG on your own machine. There is no server on the other end, so a 40 MB batch converts as fast as your computer can work, not as fast as your connection can upload. Queue as many files as you need; three convert in parallel, each one shows its before and after size, and you can save results individually or grab everything as a single ZIP. The tool is free, with no account to create and no cap on how many files you convert in a day.
JPG has no alpha channel, so any transparent areas in your PNG must be filled with something. This tool flattens them onto a white background, which suits documents, forms, and most photo uses. If your graphic sits on a dark page and needs to stay see-through, keep it as a PNG — converting it to JPG will lose the transparency permanently.
No. The conversion runs in a Web Worker inside your own browser, so your images stay on your computer from the moment you drop them to the moment you download the JPGs.
It depends on the content, but photos saved as PNG often shrink by 80–90% when converted to JPG. The tool shows the exact before and after size for every file.
JPG can't store transparency, so transparent regions are flattened onto a white background. If you need the transparency kept, stay with PNG.
JPG is a lossy format, so some data is discarded during encoding. For photographs the difference is rarely noticeable; sharp text and line art hold up better in PNG.
No daily caps and no account required. You can queue as many PNGs as you like; three are converted at a time and the rest wait in line.