JPG → PNG Converter
Use this free online JPG to PNG Converter to turn any JPEG photo into a lossless PNG file. It is useful when you need transparency, when a print job requires a non-lossy format, when a website builder rejects JPG for icons and logos, or when you want to edit a photo without compounding compression artefacts on every save. Drop one or many JPGs into the upload zone, and download the PNG copies a moment later. JPG decoding and PNG re-encoding both happen on an in-browser HTML5 Canvas, so your photos never leave your device. There is no sign-up and no batch limit beyond what your browser memory will hold.
Click to choose or drag & drop JPG images here
You can select multiple files
About PNG vs JPG
PNG uses lossless compression which preserves every pixel of detail and supports transparency, while JPG uses lossy compression for smaller file sizes. Convert to PNG when you need crisp graphics, screenshots, or transparency support.
How to Use This JPG to PNG Converter
Converting JPG to PNG is one drag-and-drop and one click.
- Drop one or many JPG files into the upload zone, or click to choose them.
- Wait a moment while the browser decodes each photo.
- Click Convert to PNG to render the lossless versions.
- Click each Download button to save individual files, or Download All for a zip.
- The original JPGs are not modified — the PNGs are completely new files.
How This JPG to PNG Converter Works
JPEG and PNG are both common image formats, but they store pictures very differently. JPEG uses lossy DCT-based compression that discards visual detail to achieve smaller files; the trade-off is permanent quality loss every time the file is saved. PNG uses lossless DEFLATE compression — the same algorithm as ZIP — so the saved pixels are bit-identical to the input. PNG also supports an alpha channel for transparency, which JPEG does not. The converter works by decoding the JPG into pixel data using the browser's built-in image decoder, drawing those pixels onto an off-screen Canvas, and then asking the Canvas to export a PNG via the toBlob API. Because the JPG was already lossy, the PNG cannot recover detail the JPEG threw away — the conversion preserves whatever quality remained in the JPG, but does not restore the original camera output. The result is still useful: it stops further compression loss on subsequent saves, allows transparency to be added, and meets the format requirements of print, design and web platforms that expect PNG. Everything happens locally, so even private photos stay on your device.
Last updated: May 2026.
Frequently Asked Questions
Will converting to PNG improve image quality?
No — quality is determined by the source. PNG just preserves whatever quality the JPEG already had, without further loss when you edit or re-save.
Why is the PNG file bigger than the JPG?
PNG is lossless and stores the full pixel data. JPEG's lossy compression makes much smaller files for photographic content.
Does PNG support transparency?
Yes — it has a full 8-bit alpha channel. JPEG does not support transparency at all, so converting a JPG to PNG won't add it but does enable adding it later in an editor.
When should I prefer PNG over JPG?
For screenshots, line art, logos, illustrations, anything with hard edges, or anything that needs transparency. Use JPG for photographs.
Can I convert multiple files at once?
Yes — the tool supports batch upload. Each file is converted independently.