Image Format Converter & Compressor

No. The conversion happens entirely inside your browser using the HTML5 Canvas API. Your images are read from disk into memory on your own device, converted there, and offered back to you as a download. No network request carrying your image data is ever made.

Add your PNG file, select JPEG as the output format, choose a quality level (85% is a good default for photos) and press Convert. Because JPEG has no transparency, any transparent areas are filled with the background colour you select.

PNG uses lossless compression, so re-encoding an image that was originally a JPEG can produce a bigger file. If your goal is a smaller file, convert to WebP or JPEG instead — PNG is best reserved for graphics, logos and images that need transparency.

For JPEG and WebP it controls the lossy compression level passed to the encoder. Higher values keep more detail but produce larger files. Values between 75% and 85% usually look identical to the original for photographs while cutting file size dramatically. The slider has no effect on PNG, which is always lossless.

There is no limit imposed by us. The practical ceiling is your device memory, since the image must be decoded into a canvas. Very large images (well over 50 megapixels) may be slow or fail on mobile devices.

Yes, when the output format supports it. PNG and WebP both preserve the alpha channel. JPEG does not support transparency, so transparent pixels are composited onto a solid background colour during conversion.

Only if your browser can decode HEIC natively, which Safari on Apple devices can. On Chrome, Firefox and Edge the format is generally not supported. Sharing the photo as "Most Compatible" from iOS gives you a JPEG that works everywhere.