DocsBolt

JPG to PNG Converter

Convert JPEG images to PNG when you need lossless quality or transparency.

.jpg, .jpeg · up to 200 MB per file

  • JPG, JPEG
  • up to 200 MB per file
  • Never uploaded

What JPG to PNG does

Convert a JPEG to PNG. The move is worth making when an image needs transparency, or when it is going to be edited repeatedly — JPEG discards a little more detail every time it is re-saved, while PNG is lossless and survives round trips intact. Screenshots, logos and line art in particular look cleaner as PNG.

The conversion decodes the JPEG in your browser and writes the pixels out as PNG, which stores them losslessly with a filter-plus-deflate compression that suits flat colour and sharp edges. A photograph has neither, so the PNG is larger; a screenshot or diagram that happened to be saved as JPEG often comes out about the same size, minus the JPEG halo around text.

The PNG has an alpha channel available but nothing in it: a JPEG has no transparent pixels, so the output is fully opaque. If you need a transparent background you still have to remove it in an editor afterwards. EXIF metadata is not carried over — PNG has no standard place for it.

Formats and limits

Accepts
.jpg, .jpeg
Produces
PNG
Files per run
One
Size limit
200 MB per file

When you'd use it

  • A logo that will be layered over a coloured background
  • Preparing an image for a site that requires PNG uploads
  • Stopping further JPEG loss when an image will be edited repeatedly

How it works

  1. 01

    Upload JPG

    Choose the image; it is never uploaded.

  2. 02

    Convert

    DocsBolt converts to PNG.

  3. 03

    Download

    Get a lossless PNG of the same pixels.

Diagram: a JPG document passes through the converter and comes out as a PNG document, with its headings, table and picture preserved.JPGCONVERTPNG

Limitations

  • The image is rebuilt from its pixels, so EXIF metadata (camera, date, GPS location) is not in the output.
  • JPEG artefacts are already baked into the source; PNG preserves them losslessly rather than removing them. Converting does not restore quality.
  • The PNG is usually 3–10× larger than the JPG, because PNG cannot compress photographs efficiently.

What happens to your file

Your file is never uploaded or stored.

Full detail in the Privacy Policy.

Questions

Will converting to PNG restore quality the JPEG lost?

No. Detail discarded by the original JPEG compression is gone permanently. What PNG gives you is that no further quality is lost from this point on, which matters if the file will be edited and saved again.

Why is the PNG bigger than the JPEG?

PNG stores every pixel exactly rather than approximating. For photographs that usually means a noticeably larger file. For screenshots and flat graphics PNG is often smaller as well as sharper.

Does this add transparency to my image?

It produces a PNG that supports transparency, but a JPEG has no transparency data to carry over, so the background stays as it was. Removing a background is a separate editing job.

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