Convert JPG to PNG Online, Free and Private

Convert JPG photos to lossless PNG in your browser. Useful before editing or adding transparency — no upload required.

Universal File Converter: Private & Fast

Convert images, videos, audio, and documents directly in your browser. Your files never leave your device, ensuring 100% privacy and security.

Image Converter

Convert images between modern formats. Ideal for thumbnails, screenshots, and photos.

Drop your file here, or browse

Maximum file size: 50 MB

Supported: JPG, PNG, WebP, AVIF, HEIC, SVG, GIF, BMP, TIFF, ICO

Output format

Looking for more tools?Resize & Crop Images →

100% In-Browser Processing

Your files are processed strictly in local device memory. Nothing is uploaded — see how, and check for yourself.

How It Works

How to convert files with DuckConvert

Select Your File

Choose the file you want to convert from your device or drag and drop it into the converter.

Choose Output Format

Select your desired output format and any specific settings for your conversion.

Convert & Download

Click "Start Conversion" and wait for the local process to finish, then download your new file.

Don't take our word for it

This conversion runs entirely in your browser — nothing is uploaded. See exactly how, and check for yourself using your browser's DevTools Network tab.

How It Works

Conversion Mechanics

Converting a JPG to PNG doesn't recover detail the JPG's lossy compression already discarded, but it stops further generational loss — worth doing before you start editing, layering, or repeatedly re-saving an image in tools that re-compress JPGs each time. It's also the right move when you need a transparent background on what started as a flat photo, since PNG (unlike JPG) supports an alpha channel.

Why It's Private

Runs Entirely In Your Browser: Files are decoded and re-encoded strictly in local memory.
No Network Requests: The converter makes no calls to any server — check your browser's DevTools Network tab to confirm.
Nothing to Sign Up For: No account, no upload, and no server-side storage of your files.
Runs On Your Hardware: Processing uses your own device's CPU via Web Workers, not a remote server.

Step-by-Step JPG to PNG Local Guide

Select File

Drop your .jpg file into the box above.

Configure

Confirm PNG is selected as the output format.

Convert

Click Convert — re-encoding happens locally in your browser.

Save Result

Download the resulting .png file.

Frequently Asked Questions on Secure JPG to PNG Conversion

No — PNG is lossless from this point forward, but it can't restore detail the original JPG compression already threw away.

Not automatically — this converts the JPG to PNG as-is. To remove a background, run the result through DuckConvert's Background Removal tool afterward.

PNG uses lossless compression, so photographic images — which JPG handles very efficiently — typically end up several times larger as PNGs.