About this tool
Large images are one of the most common reasons web pages load slowly. A photo straight from a phone camera can be 4 to 8 MB, while the same picture displayed on a web page often looks identical at 150 to 300 KB. This image compressor shrinks your pictures right in the browser, so you can speed up your website, fit email attachment limits or save storage space without installing any software.
You can add several images at once and choose the output format, the quality, and an optional maximum width. JPEG is best for photographs. WebP usually produces files 25 to 35 percent smaller than JPEG at the same visual quality and is supported by all modern browsers. Lowering the quality slider reduces the file size; values between 70 and 85 normally give a big saving with almost no visible difference. Resizing a very large image to the width it will actually be displayed at is the most effective way to cut size.
The tool shows the original and the new size for each image together with the percentage saved, and a preview so you can judge the result before downloading. When you convert a PNG with transparent areas to JPEG, the transparent background is filled with white because JPEG cannot store transparency; choose WebP to keep transparency.
Compression is done by your own device using the browser's built-in image engine and a background worker, so the page stays responsive. Your pictures are never uploaded, which protects your privacy and makes the tool work even on a slow connection.