Image Compressor

No. Each image is decoded and re-encoded on a canvas inside your browser. Nothing is sent to Hypello or anywhere else, so it is safe for private photos and client work.

For photos, 70 to 80 percent usually looks the same as the original on a phone screen while cutting the file size by half or more. Go higher (85 to 90) for images with fine text or gradients you will zoom into, and lower (50 to 60) for small thumbnails.

Browsers can only save PNG losslessly, so re-saving a PNG mostly helps when you also reduce its size. To shrink a PNG a lot, convert it to WebP, which keeps transparency, or to JPEG if it has no transparent areas. Screenshots and logos with few colours often stay smallest as PNG.

If the compressed version comes out larger than your original in the same format and size, the tool keeps your original file instead. This happens with images that were already compressed well.

Compressed images are re-drawn from the pixels, so EXIF data such as the camera model and GPS location is not copied into them. The photo's rotation is applied to the pixels first, so it still displays the right way up. If a file is kept as the original, its metadata stays as it was.

WebP files are usually 25 to 35 percent smaller than JPEGs of the same visual quality and support transparency. All modern browsers display WebP, so it is a good choice for websites. JPEG is the safest choice for email attachments and platforms that don't accept WebP uploads.