Convert JPG images to PNG (or PNG to JPG) in this browser tab — batch, no upload, no watermark. The image never leaves your device.
Runs 100% in your browser. No upload.
Offline proof: after this page loads, turn on airplane mode — the tool still runs here. Your files never leave this device.
Drop JPG or PNG files
Or click to browse — multiple files OK
Soft limit: about 50 files per round (very large batches can slow the tab). Drop again for the rest — everything still stays on your device.
Convert to PNG when you plan to edit and re-save repeatedly (PNG is lossless, so it will not keep degrading), or when a tool only accepts PNG. Remember a JPG has already thrown away some detail and has no transparency — PNG keeps what is there without adding more loss, but it cannot bring back what JPG removed.
Conversion uses the Canvas API in your browser. Files never leave your device.
Drop your JPG files above (the direction is set to JPG → PNG) and download the PNGs. It runs in your browser with the Canvas API — nothing is uploaded.
PNG is lossless, so it will not add more JPG compression artefacts when you edit and re-save. Some tools and upload forms also require PNG. Note: converting cannot recover detail JPG already discarded.
No — a JPG has no transparency, so the PNG will have a solid background. Use an editor to add transparency after converting if you need it.
Yes — flip the direction dropdown to PNG → JPG when you need a smaller file.
No. Decoding and re-encoding happen in your browser. Turn on airplane mode after the page loads and it still works.