Convert JPG to PNG
Convert JPG images to PNG with transparency support. Convert multiple files simultaneously. We run all conversions locally in your browser, keeping your files completely secure.
Choose JPG files
Drag and drop multiple files at once
How to use
- 1
Drag and drop your JPG files above or click to select. Feel free to add multiple files at once.
- 2
Click "Convert" to process your files in sequence. You can track progress for each file.
- 3
Download your finished PNGs individually, or grab everything in a single ZIP file if you converted multiple images.
FAQ
- Why should I convert to PNG?
- PNG features lossless compression to prevent quality loss and supports transparent backgrounds (alpha channel). It works perfectly for logos, icons, and graphics that require crisp lines or further editing.
- Why is the PNG file larger than my original JPG?
- JPG compresses files lossily, making them smaller than lossless PNGs. Converting photographs or natural images to PNG often increases their file size. To shrink them, convert back to JPG or use our resize tool.
- Will this create a transparent background?
- No. JPG files do not contain transparency details, so we cannot generate a transparent background automatically. We copy the pixels into a PNG container without modifying them. You will need a background removal tool to make it transparent.
JPG vs. PNG: What's Actually Different
They look identical on screen but work in opposite ways. JPG uses lossy compression — it throws away detail your eye barely registers, which keeps files small and suits photographs with smooth colour transitions. PNG uses lossless compression, keeps every pixel, and can carry a transparent background (alpha channel), which is why logos, icons and text-heavy graphics belong in PNG.
Does PNG Really Blow Up File Size? We Measured It
"PNG is lossless, so it's heavy" is only half true. We built three images with different characteristics, encoded each under identical conditions, and measured the actual bytes. Every source is 1600×1067 (1.71MP), encoded with libvips 8.18.3.
| Source type | JPG quality 80 | PNG (lossless) | PNG vs JPG |
|---|---|---|---|
| Photograph (with grain) | 269 KB | 3,591 KB | 13.3× |
| Flat graphic (logo, illustration) | 29 KB | 23 KB | 0.8× |
| Screenshot (mostly text) | 97 KB | 94 KB | 1.0× |
The answer splits sharply by image type. A photograph balloons to 13.3× its JPG size — PNG is clearly the wrong choice there. But a flat graphic came out smaller as PNG than as JPG (23 KB vs 29 KB), and a screenshot was essentially a tie (94 KB vs 97 KB). For logos and screenshots you give up almost nothing in size and get lossless quality for free. The "PNG is always bigger" rule only holds for photographs.
What Happens at the Edges
By size alone a screenshot looks like a coin flip. The difference shows up when you zoom in. Below is the same shape boundary at 6× magnification — PNG on the left, JPG quality 60 on the right.
JPG compresses in 8×8 pixel tiles, so wherever colour changes abruptly it introduces artefacts that were never in the original. You rarely notice this in a photo, but on a logo edge or small type it reads as dirt. Here is text at 4× magnification.
The Transparency Misconception
The most common mix-up is expecting a JPG to become transparent simply by saving it as PNG. Transparency is a capability of the PNG format, not something conversion applies for you — an existing white background stays exactly where it is. To get transparency you have to cut the subject out in an editor first, then export as PNG. Converting only prepares a container that is able to hold transparency.
So When Should You Convert?
- Logos and icons you need on a transparent background — they will sit on any colour.
- Screenshots and UI captures — as measured above, the size cost is negligible and text stays crisp.
- Working files you will edit and re-save repeatedly — no quality erosion with each save.
- Conversely, keep full-frame photographs as JPG. PNG buys you no visible quality there, only bytes.
Related guides
JPG vs PNG: Which One Should You Use?
JPG is best for photos; PNG is best for logos and transparent backgrounds. Learn the difference between lossy and lossless compression, file size, and transparency.
How to Reduce Image File Size (and How It Actually Works)
Lowering resolution and raising compression are not the same thing. Learn when quality loss is fine and how to shrink images for web and print the right way.