JPG to PNG Converter

Summary

Drop or select JPG/JPEG images and download them as lossless PNG files — all processing happens in your browser.

How it works

1. Click "Choose Images" or drag and drop one or more JPG/JPEG files onto the drop zone.
2. The tool reads each file using the FileReader API and draws it onto an HTML5 Canvas.
3. The canvas is exported as a PNG data URL using toDataURL("image/png").
4. A preview thumbnail and file size are shown for each converted image.
5. Click "Download PNG" next to any image, or "Download All" to save everything at once.

Use cases

• Convert product photos from JPG to lossless PNG before uploading to design tools.
• Preserve transparency after converting screenshots that were saved as JPG by mistake.
• Batch-convert a set of JPG images to PNG without installing any software.
• Prepare images for web use where PNG is required by a CMS or design specification.
• Convert JPG icons or logos to PNG for better quality when overlaid on colored backgrounds.
• Process images privately without sending files to a third-party server.

Frequently Asked Questions