Change standard compressed JPG pictures into pristine, high-fidelity PNG files safely.
JPG is the most common file extension for images compressed with the JPEG standard, published in 1992. It applies lossy compression based on the discrete cosine transform, splitting images into small blocks and discarding visually insignificant detail to shrink file size. The compression level is adjustable: higher quality keeps more detail at a larger size, while lower quality trades visible artifacts for a much smaller file. JPG supports 24-bit true color and embeds Exif metadata such as camera model and capture date. Its biggest strength is universal compatibility — it is the native output of virtually every camera and phone, and opens in every browser, viewer, and operating system without exception.
PNG (Portable Network Graphics) is a lossless raster format released in the mid-1990s as a royalty-free successor to GIF, after a licensing dispute over the LZW compression algorithm. It compresses images with the DEFLATE algorithm, the same method used by ZIP archives, so every pixel is preserved exactly with no generation loss on repeated saves. PNG also supports a full 8-bit alpha channel for smooth, partial transparency, unlike GIF's binary on/off transparency. These properties make it the standard choice for screenshots, logos, icons, and any graphic with sharp edges, flat colors, or text that needs to stay perfectly crisp.
Converting to PNG ensures your image stops suffering from generational compression artifacts.
It prevents further quality loss, but cannot recreate data already stripped.
Yes, this tool is completely free with no registration, no watermark, and no conversion limit.
No, the conversion happens locally in your browser using JavaScript. Your files are never uploaded to any external server.
There's no fixed limit enforced by the tool since everything runs in your browser rather than on a server.
For most everyday uses, the visual difference is negligible.