What is a JPG file?
JPEG has been the default format for photographs since 1992. It uses lossy compression tuned for natural images, which lets it shrink photos to a fraction of their raw size while keeping them visually convincing. Virtually every camera, phone, browser, and app on the planet can open a JPG.
In short, JPG is the universal standard for photographs. It is best for photographs, screenshots of photos, email attachments, and anywhere maximum compatibility matters more than perfect fidelity. Its main limitations are no transparency support, visible artifacts at low quality settings, and quality degrades each time the file is re-saved.
Why convert JPG to PNG?
PNG is a lossless format designed for the web. Every pixel is preserved exactly, and its alpha channel supports smooth, variable transparency — which is why logos, icons, and UI screenshots are almost always PNGs. The tradeoff is file size: photographs saved as PNG can be several times larger than an equivalent JPG.
Converting from JPG to PNG makes sense when you need logos, icons, screenshots with text, diagrams, and any image that needs a transparent background. PNG is universally supported in every modern and legacy browser.
PNG supports full transparency, so images you later edit can take advantage of an alpha channel — though a converted JPG starts out fully opaque.
Because PNG is lossless, the conversion will not add any new compression artifacts — but it also cannot restore detail the original JPG compression already discarded.
How to convert JPG to PNG
Drag and drop one or more JPG files into the box above (or click to browse). Then press Convert. Each file is decoded and re-encoded as PNG on your own device in a second or two, and you can download results individually or grab everything as a ZIP.
Unlike most online converters, FileLark never uploads your files to a server. The conversion runs entirely inside your browser using modern web technology, which means it works offline once the page has loaded, there are no file size queues or daily upload limits, and your images can never be stored, scanned, or leaked — they simply never leave your device.