How to Convert JPEG to PNG with Transparency

1Upload JPEG
Choose the JPG or JPEG image you want to convert.
2Optional Background Knockout
Select solid background color (e.g. white or black) to convert into pure transparency.
3Download PNG
Download your lossless PNG image.

Background Knockout: Removes solid background colors (e.g. pure white #FFFFFF) with tolerance tuning.
8-Bit Quantization: Converts 24-bit RGB to a compact 256-color palette.

Lossless Conversion
Converts compressed JPEG pixels into pristine, uncompressed PNG format.
Background Color Keying
Knocks out solid white or black backgrounds into transparent alpha channels.
8-Bit Palette Quantization
Optional Floyd-Steinberg dithering for compact PNG outputs.
Local & Fast
Convert dozens of images in seconds without server waiting times.

Background Knockout scans peripheral edge pixels, matching colors within an adjustable delta tolerance to set corresponding pixel alpha channels to `0` (transparent).

No, and this is the most common misunderstanding about the conversion. PNG is lossless, which means it reproduces exactly what it is given — including every blocking artifact and colour smear the JPEG already contains. You get a faithful, permanent copy of a lossy image, not a repaired one. The detail JPEG discarded is gone from the file and no format change can bring it back.

Because you removed the compression that was making it small. A JPEG of a photograph stores an approximation in a fraction of the space; PNG stores every pixel exactly and, for photographic content, that routinely means a file five to ten times larger. This is expected rather than a fault. If you need a smaller lossless-quality file, WebP in lossless mode is usually meaningfully smaller than PNG for the same pixels.

Three cases make it worthwhile. When you need transparency — knocking a white background off a logo, for example, which JPEG cannot represent at all. When the file is about to be edited repeatedly and you want a lossless working copy so that repeated saves stop degrading it. And when a system you are submitting to accepts only PNG. Converting a photograph you simply want to keep or share is not one of these.

JPEG to PNG

Convert JPG photos to PNG format and remove solid backgrounds in one step.

Drop JPEG image(s) here

or click to browse • Up to 50 JPEG files

Max 100MB per fileUp to 50 files

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