FileConvertMage

Compatibility

JPG to PNG

Turn a JPEG into a PNG when a tool asks for PNG. This does not restore detail JPEG already discarded.

Your file is processed in your browser and is not uploaded to FileConvertMage. Browser extensions, the clipboard, and screen capture can still expose a file on your device.

Detected input: none

Target output: PNG

Choose one file, or drop it on the box. The filename is not trusted until the bytes match JPG.

Drop one JPG here. The file picker above is the keyboard-accessible path.

Choose a JPG file.

Original

Output

What this conversion changes

  • EXIF and other JPEG metadata
  • ICC profile
  • Original JPEG compression characteristics

How it works

JPEG magic bytes are required. The browser decodes the photo onto a canvas and exports PNG. EXIF is not copied into the new file.

Input and output

Input is one JPEG. Output is a new .png with MIME image/png. Files named .jpg that are not JPEG bytes are rejected.

Common uses

Editors that want PNG

Some design tools import PNG more cleanly than JPEG for further lossless edits.

Forms that reject JPEG

A few upload fields accept PNG only even when the source is a camera photo.

How to convert this file

  1. Choose a JPG or JPEG file.
  2. Convert. There is no quality slider because native PNG export has none.
  3. Compare sizes before you download. Growth is common.

Limitations

  • File size often increases.
  • EXIF, GPS, and camera tags are dropped.
  • No transparency is created.

Questions

Why is the PNG larger than the JPG?

JPEG stores photographs efficiently with loss. PNG stores pixels more literally. Re-wrapping a photo as PNG often increases bytes.

Does this add a transparent background?

No. A JPEG has no alpha channel. The PNG will be fully opaque.

Is this lossless?

The PNG container is lossless from the decoded pixels forward. Those pixels already went through JPEG compression, so the photograph is not a lossless original.

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