Convert JPG to PNG (Lossless Format)

Convert JPG images to PNG format. Understand the quality difference, when it helps, and when it does not. Free, honest, no-signup conversion.

✔ What it does

Converts JPG files into PNG format using lossless encoding, preventing any further quality loss from additional compression.

✘ What it does not do

Does NOT restore quality already lost during the original JPG compression. Previous compression losses are permanent and cannot be recovered.

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How JPG → PNG conversion works

JPG uses lossy compression — data is permanently discarded when the file is saved to reduce file size. PNG uses lossless compression — all pixel values are stored exactly. This tool decodes the JPG pixel data and re-encodes it as PNG. The pixel values as they exist in the JPG are preserved exactly in the PNG — no additional degradation occurs during conversion. However, if the source JPG was heavily compressed, those artefacts are permanently baked into the pixel data and will be present in the PNG output. The PNG will be larger than the JPG because lossless compression stores more data.

Limitations

Cannot restore original quality from a compressed JPG — the quality ceiling is the source file.
PNG file size will be larger than the source JPG because lossless compression stores more data.
EXIF metadata may not be fully preserved across all encoders.

When to use this conversion

Converting a JPG before further editing to prevent additional quality loss from re-saving.
Preparing screenshots or graphics-with-text for editing in software that works better with lossless formats.
Images that will need transparency support added after conversion.

Alternatives to consider

If the original source file exists, export directly to PNG from your original software — no conversion needed.
Use Photoshop or GIMP for non-destructive editing workflows with lossless source formats.

Frequently asked questions

Will converting JPG to PNG improve quality?

No. PNG prevents future quality loss but cannot recover quality that was already lost during the original JPG compression.

Why is the PNG file larger?

PNG uses lossless compression — it stores more pixel data than JPG's lossy method. The larger size is correct and expected.

Can I add transparency after converting?

Yes. PNG supports transparency natively. Use an image editor to add an alpha channel after conversion.