Image Converter

Choose an image, select the output format and click Convert. Compare the real converted image and file size before downloading. The percentage is the file size change relative to the original; a positive value means a larger file.

PNG and WebP preserve transparency. JPEG and PNM use the selected background. JPEG and WebP quality affects lossy compression, not image dimensions. PBM uses a fixed grayscale threshold of 128; PGM uses weighted RGB grayscale. PNM files contain plain text pixels.

Copy transfers the converted pixels as PNG because image clipboards use PNG. Right-clicking the original saves the original, not the converted file. Browser re-encoding may remove metadata and does not retain animation: only one browser-decoded frame is converted. Color handling depends on the browser.

Files stay in this browser. Input limit: 50 MiB and 16 million pixels; PNM: 1 million pixels to limit text size. PNM conversion reports progress between batches; browser encoding has no reliable percentage. Cancel discards pending results; native browser encoding may finish in the background. Settings are remembered while navigating, images are not.