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PNG is the format of choice when you need lossless quality or plan to add transparency later, while JPG is common for photos straight off a phone or camera. This tool converts your JPG to PNG entirely in your browser using the Canvas API — upload your file and download the converted PNG. Since JPG has no transparency data, the result is a fully opaque PNG the same pixel dimensions as your original.
Why convert JPG to PNG
The usual reason is that something downstream needs a lossless file — a design tool that will re-edit the image, a print workflow, or a platform that rejects JPG. PNG stores pixels exactly, so once converted the image will not degrade further no matter how many times it is opened and re-saved. That matters for a working file you will keep editing, where repeated JPG saves compound artefacts with every round trip.
What you gain and what you give up
You gain exactness and future editability: no further generation loss, and an alpha channel available if you later add transparency. You give up file size, usually several times over, because PNG cannot use the lossy tricks that made the JPG small. Importantly, converting does not recover quality already lost — the artefacts baked into the JPG are now preserved losslessly rather than removed.
When this is the wrong conversion
If the image is a photograph destined for a website or an upload form, staying with JPG is almost always better — you would be multiplying file size for no visible gain. Convert to PNG when something specifically requires it or when the file is entering an editing workflow, not as a general quality upgrade.
Frequently asked questions
- Will converting to PNG add transparency?
- No, JPG files don't store transparency data, so the converted PNG will be fully opaque, just in PNG format.
- Will the file get bigger?
- Usually yes — PNG is lossless, so it typically produces a larger file than the equivalent JPG, especially for photos with lots of detail.
- Are my images uploaded to a server?
- No, conversion happens locally in your browser using the Canvas API. Nothing is sent anywhere.
- Does image quality change during conversion?
- No, PNG is lossless, so no additional quality is lost during the conversion itself.
- Will converting to PNG improve my photo's quality?
- No. Detail already discarded by JPG compression is gone permanently. PNG preserves the image exactly as it currently is, artefacts included.