Why convert JPG to PNG
Some tools ask for PNG: icon and sticker makers, design apps, slide templates, or a form that only takes PNG. Converting also stops further quality loss if you keep editing the picture, since every new JPG save compresses it again.
JPG is JPEG, the photo format every camera, phone, website and program reads; PNG is PNG, the lossless format of screenshots, logos and graphics with transparency.
What changes
- PNG is lossless, so the picture looks exactly like the JPG, but the file is usually larger.
- Photo metadata such as camera details and GPS location is not copied to the new file.
Nothing is uploaded
Your pictures are converted by your own browser and saved straight back to your device. There is no sign-up, watermark or daily limit, and you can convert up to five files at once.
How this works
The picture is decoded by your browser in a Web Worker, with phone orientation applied, then encoded as lossless PNG by the browser's own encoder (canvas convertToBlob). Up to five files are converted one after another, and several results can be downloaded together as a ZIP. Nothing is uploaded, so there's no account or daily limit.
Frequently asked
Will the picture lose quality?
No: PNG is lossless, so every pixel is kept.
Are my images uploaded?
No. The conversion runs in your browser on this device; nothing is sent to a server.
Can I convert several files at once?
Yes, up to five at a time. Several results can be downloaded one by one or together as a ZIP.
Sources
- ITU-T T.81 — Digital compression and coding of continuous-tone still images (JPEG)
- W3C — Portable Network Graphics (PNG) Specification (Third Edition)
- HTML Standard — OffscreenCanvas convertToBlob()
Reviewed Oct 19, 2026 · test vectors fixtures/convert/image/jpg-to-png/