Nouplo

Convert JPG to PNG

Get a lossless PNG copy of any JPG without uploading it anywhere.

Drop files here

or click to choose from your deviceAccepted: JPG, JPEG

Up to 3 files per runUp to 20 MB per file5 runs per dayRemove limits with Pro✓ Works offline

Your files stay on your device

This tool runs entirely in your browser. Nothing is uploaded, nothing is stored, and you can even turn off your internet connection before you start.

Example

Example: a 1024 × 1024 app icon exported as JPG, for a listing that wants PNG

A designer exported an app icon as icon.jpg, 1024 × 1024 pixels on a solid blue background, and the app store listing asks for a 1024 × 1024 PNG. Nothing to set: PNG keeps the pixels as they are.

  1. Drop icon.jpg and press Convert to PNG: it comes back as icon.png, still 1024 × 1024 pixels.
  2. The PNG is fully opaque, like the JPG: the blue background stays.
  3. Any JPG artefacts in the icon stay too. If they show, export again from the design file at a high quality.
icon.jpg icon.png
Pixels 1024 × 10241024 × 1024
Compression LossyLossless: nothing more is lost
Transparency NoneNone (opaque)
Camera or editor details (EXIF) May be in the fileNot carried over

icon.png, ready to upload, and larger than the JPG, as a lossless file is. Further edits and saves as PNG add no new loss.

How it works

  1. Drop .jpg or .jpeg files onto the box, or choose them from your device.
  2. No settings are required. PNG is lossless, so the decoded pixels are stored exactly as they are.
  3. Press Convert to PNG. The conversion runs in a Web Worker in your browser.
  4. Download the PNG files separately or as a ZIP.

Frequently asked questions

Why would I convert JPG to PNG?
Some tools only accept PNG: app icon generators, certain print-on-demand services, game engines and design templates. PNG is also the right format before repeated editing, because each JPG save adds a little more compression damage while PNG never does.
Are my photos uploaded?
No. Decoding and encoding happen on your device inside the browser. Nothing is sent to a server, and the tool works offline.
Does converting to PNG improve the quality?
No. PNG faithfully preserves the pixels as they are in the JPG, including any existing compression artefacts. It stops further loss; it cannot undo previous loss.
Can I make the background transparent?
Not with this tool. JPG has no transparency, and the PNG will be fully opaque. You would need an editor to remove the background after converting.
Why is the PNG bigger than the JPG?
PNG is a lossless format and photos do not compress well losslessly. A 2 MB JPG commonly becomes a 10-15 MB PNG. This is normal.
Are the camera details and location kept?
No. The PNG is written from the picture’s pixels, so EXIF in the JPG, such as the camera model, the date and a GPS position, is not carried over.
What are the free limits?
The free plan allows 3 files per run, 20 MB per file and 5 runs per day. Pro removes these limits.

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