JPG to PNG Converter
Convert a JPG image to a lossless PNG entirely in your browser. Drop or choose a JPG and download a pixel-perfect PNG in one click — no quality loss, no watermark, and no sign-up. The image is decoded and re-encoded on your device with an HTML canvas, so private photos, screenshots, and documents are never uploaded.
What this JPG to PNG converter does
This is a free, browser-based tool that takes a JPG (also called JPEG) and saves it as a PNG. JPG is a lossy format built for small photo files, while PNG is lossless — it keeps every pixel exactly as it is. Converting from JPG to PNG gives you a clean, lossless copy that is easy to drop into an image editor, paste into a document, or feed to a tool that specifically asks for a PNG. The whole job runs on your device: the JPG is decoded, drawn onto an HTML canvas, and re-encoded as a PNG without ever being uploaded.
How to use it
- Add your JPG — click to choose a file, drag and drop it onto the drop zone, or paste with Ctrl+V (Cmd+V on Mac).
- The PNG is generated instantly, with a preview and the before-and-after file sizes.
- Click Download PNG to save it. Use Convert another to start over. Drop in, download, done.
How the conversion works
The tool loads your JPG into an Image, draws it onto a <canvas>
at its native resolution, and calls canvas.toBlob(blob, "image/png"). PNG
encoding is lossless, so the pixels written to the PNG are exactly the pixels the browser
decoded from your JPG — there is no second round of lossy compression and no quality drop in
this step. The result is a faithful copy, which is why a PNG is a good working format when you
plan to edit, crop, or annotate the image afterwards.
What JPG to PNG can — and cannot — do
It helps to be clear about what changing the container does and does not change:
- It does not recover lost detail. Whatever a JPG already threw away when it was first compressed is gone for good. A lossless PNG preserves the current pixels perfectly, but it cannot bring back the original sharpness, so converting will not "un-blur" or de-artifact a low-quality JPG.
- It does not add transparency. A JPG has no alpha channel, so the PNG keeps the original solid background. PNG supports transparency, but a JPG carries none to begin with — there is no transparent background to restore. Getting a cut-out subject needs a separate background-removal step.
- It usually makes the file larger. Lossless PNG storing every pixel is heavier than a lossy JPG, especially for photographs. The size readout shows the difference up front so there are no surprises.
When converting to PNG is the right call
- Re-editing. You want a lossless working copy so repeated edits and re-saves do not stack up JPG compression artifacts.
- Sharper edges and text. Screenshots, charts, diagrams, and logos with hard edges and text stay crisp in PNG, where JPG can add fuzzy halos.
- Tools that require PNG. Some uploaders, design apps, icon pipelines, and printing services accept only PNG — converting gets your JPG through the door.
- A clean source for layering. A lossless PNG is a better base to composite on top of, even though the JPG-derived image itself stays opaque.
Privacy by design
Many JPG to PNG sites upload your file to their servers to do the conversion. This one does not. Your image is read, drawn onto a canvas, and re-encoded as a PNG entirely in JavaScript on your device, so it never leaves your browser. That means you can safely convert private photos, internal screenshots, signed documents, or client mockups without handing them to a third party. Close the tab and nothing remains.
It is part of a small image toolkit. To go the other direction, use PNG to JPG; to make a file smaller before sending it, try the Image Compressor; to change pixel dimensions, use the Image Resizer; and to inline an image as text, reach for Image to Base64.
Frequently asked questions
Will converting JPG to PNG improve the image quality?
No. PNG is a lossless format, so the conversion never adds quality loss — but it also cannot restore detail the JPG already discarded when it was first saved. You get a faithful, lossless copy of the exact pixels in your JPG, which is ideal for further editing or for tools that need a clean PNG.
Will the PNG have a transparent background?
No. A JPG has no transparency information to begin with, so the PNG keeps the original solid background. PNG supports transparency, but converting a JPG cannot invent an alpha channel that was never in the source. To get a transparent background you would need a separate background-removal step.
Why is my PNG file bigger than the JPG?
That is expected. JPG uses lossy compression tuned for photos, so it produces small files by throwing away detail. PNG stores every pixel losslessly, which usually makes the file larger — especially for photographs. The tool shows both sizes so you can decide whether the lossless PNG is worth the extra weight.
Is my image uploaded to a server?
No. The whole conversion runs on your device using an HTML canvas. Your JPG is read, drawn, and re-encoded as a PNG entirely in your browser and is never sent anywhere, so private photos, screenshots, and documents stay with you.