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JPG to PNG
Convert JPG photos into lossless PNG files.
Drag & drop files here
or use the button below · processed locally on your device
How JPG to PNG works
- 1Drop your files onto the upload area or use Browse Files.
- 2Adjust the output settings if you need a different quality level.
- 3Conversion runs entirely in your browser — nothing is uploaded to a server.
- 4Download each result individually or grab everything as a ZIP.
Frequently asked questions
Is JPG to PNG free to use?
Yes. Every converter on OneCalc is free and unlimited, with no account and no watermark.
Are my files uploaded to a server?
No. Conversion runs entirely inside your browser using WebAssembly and Canvas APIs, so your files never leave your device.
Does it work on mobile?
Yes. The interface is fully responsive and supports touch, the mobile file picker and the native share sheet.
Can I convert multiple files at once?
Yes. Select or drop as many files as you like — each one is processed in turn and you can download them all as a ZIP.