JPG to PNG Converter - Free Online Image Converter

Usually yes, especially for photographs. PNG uses lossless compression, so it preserves every pixel without discarding data - which means file sizes are typically 2–5 times larger than JPG equivalents. A 500 KB JPG might become 1–3 MB as a PNG. However, for simple graphics, icons, or images with large flat-color areas, PNG can sometimes be smaller than JPG because its compression algorithm handles uniform regions very efficiently.

No - converting to PNG will not recover detail already lost during the original JPG compression. Think of it like photocopying a photocopy: the lost data cannot be restored. However, once converted, the PNG format prevents any further quality degradation. Every future edit, crop, or re-save will remain lossless, making PNG the better choice when you plan to modify the image repeatedly.

Not automatically. JPG files do not contain alpha channel data, so the conversion itself cannot create transparent regions. However, once your image is in PNG format, it fully supports transparency. You can then use an image editor like Photoshop, Figma, Canva, or GIMP to remove the background or erase specific areas, and those transparent sections will be preserved correctly in the PNG file.

No. All conversion happens entirely in your browser using client-side JavaScript and the HTML5 Canvas API. Your images never leave your device - they are not uploaded, transmitted, or stored on any server. This means your files remain completely private, and the tool works even without an internet connection once the page has loaded. There is zero data collection involved in the conversion process.

Windows SmartScreen may flag files downloaded from the internet as potentially unsafe - this is a standard security feature that applies to all browser-generated downloads, not just ours. The ZIP and its contents are completely safe. To proceed, click "More info" and then "Run anyway" in the SmartScreen dialog. This is a one-time prompt per download and does not indicate any actual security threat with your converted files.

The tool supports files up to 100 MB each. Since conversion runs in your browser, the practical limit depends on your device's available memory and processing power. Very large images or batches of many high-resolution files may cause slowdowns on devices with limited RAM. For best results, we recommend processing large batches in groups of 10–20 files at a time, especially on mobile devices or older computers.

This JPG to PNG converter is designed specifically for static JPG and JPEG images. Animated GIFs require specialized handling - each frame must be extracted and processed individually - which is beyond the scope of this tool. We plan to offer dedicated GIF conversion tools in the future. For now, you can use this converter for any standard JPG photograph, screenshot, or static graphic.

The ZIP file is completely safe. Browsers and operating systems sometimes flag programmatically generated downloads because they are created using JavaScript Blob APIs rather than traditional server-side downloads. This triggers generic safety warnings regardless of the actual file content. Our site uses HTTPS and sanitized filenames to minimize these warnings. If prompted, you can safely extract and use all files inside the archive.

The PNG output itself is lossless relative to what the browser's canvas renders. However, any quality already lost during the original JPG compression cannot be recovered - that data was permanently discarded when the JPG was first created. At 100% quality setting, the converter produces a full 24-bit lossless PNG. Lower quality settings apply color posterization to reduce file size while still using lossless PNG encoding.

JPG does not support alpha channels or transparency - it is a format limited to opaque pixels only. If your original image has transparency, it was likely a PNG, WebP, or TIFF file renamed with a .jpg extension. Converting a true JPG to PNG will not add transparency. To create transparent PNGs, first convert the file, then use an image editor to remove the background and save with alpha channel support.

Minor color shifts can occur because embedded ICC color profiles from the original JPG may not transfer during browser-based canvas conversion. Browsers handle color management differently - some apply sRGB mapping while others ignore profiles entirely. For most use cases, the difference is imperceptible. If color accuracy is critical for professional printing or design work, we recommend using a desktop application like Photoshop that fully preserves ICC profiles.