JPG to PNG Converter

Converting does not restore quality

JPEG is lossy: information was discarded permanently when the file was first saved. Converting to PNG preserves every pixel of what remains, but it cannot recover what was thrown away. Compression artefacts, the blocky halos around sharp edges and the mottling in smooth skies, are baked into the pixel data and survive the conversion intact. A JPEG converted to PNG looks exactly like the JPEG, only larger.

Expect the file to grow

PNG is lossless, so a photograph converted from JPEG typically becomes three to ten times larger. That is not a defect: PNG is storing every pixel exactly, including the artefacts. If the goal is a smaller file, this conversion moves in the wrong direction.

When PNG is the right target

Three cases. You need transparency, which JPEG cannot store at all. You are about to edit the image repeatedly and want no further generational loss during the editing rounds. Or the image is a screenshot, logo or diagram with sharp edges and flat colour, where PNG both looks better and compresses well.

When it is the wrong target

For a photograph destined for the web, converting JPEG to PNG makes the page heavier for no visible gain. If you want a modern format, WebP is the better answer: it is typically 25 to 35 percent smaller than the original JPEG, supports transparency, and is supported everywhere that matters.

Transparency has to be added

Converting to PNG does not create an alpha channel with anything useful in it. The image gains the capacity for transparency, but every pixel remains opaque. Removing a background is a separate editing step.

Converted on your device

The conversion uses the browser canvas, so the file is never uploaded. Canvas processing also strips EXIF metadata, including any GPS coordinates the camera recorded.

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