Image Compressor

No. Everything runs locally in your browser using standard web APIs — your text, files and inputs are never uploaded to a server, so the tool works even offline once the page has loaded.

Twenty per batch. Each one is held as both its original bytes and a decoded bitmap, so twenty phone photos is already several hundred megabytes of tab — beyond that the page slows down and eventually risks taking the whole batch with it. Nothing limits how many batches you run, and none of it is metered.

JPEG uses lossy compression, so very aggressive targets can soften detail, but moderate settings shrink files substantially with little visible change. PNG stays lossless. For photographs, JPEG compression at 75-85% quality typically achieves a 50% file size reduction with imperceptible quality loss to human eyes. PNG is better for graphics, logos, and images with sharp edges where any quality loss is visible, though lossless compression yields smaller files than uncompressed formats. Experiment with moderate compression levels first, then preview the result to ensure it meets your quality standards before downloading.

For web pages, most photos look great well under 200 KB. Lower the target for thumbnails and raise it for hero images that need more detail. A 100-150 KB JPEG is ideal for product images in e-commerce, while 200-400 KB works well for full-width hero images on homepages. Social media platforms like Instagram and Facebook automatically compress uploads, so files under 200 KB rarely need further optimization before posting. For email attachments, aim for 50-100 KB to stay within typical inbox size limits. Consider using WebP format, which often achieves 20-30% better compression than JPEG at the same quality level.