How to use this tool
- Drop one or more images onto the box, or tap to choose them.
- Adjust the quality slider. 70–80% usually looks the same as the original.
- Download each compressed image from the table.
How compression works
JPG and WebP throw away fine detail that the eye barely notices. Lowering the quality setting removes more of it and makes the file smaller. Between 70% and 80% most photos look identical to the original at a fraction of the size. Below about 50% you may start to see blocky patches in smooth areas like sky.
Resize first for the biggest savings
Phone cameras take photos 4,000 pixels wide or more, far bigger than any screen needs. Setting a maximum width of 1920 px for websites, or 1200 px for email, often cuts the file size by more than half before quality is even touched.
Your photos stay private
Most online compressors upload your images to their servers. This one doesn't. The work is done by your browser, so it's safe for ID documents, medical reports and personal photos, and it keeps working on a slow connection.
PNG files with transparency
Transparent areas are filled with white when saved as JPG. Choose WebP to keep a smaller file, or keep the original PNG if you need transparency.
Frequently asked questions
How do I reduce an image to a certain KB size?
Lower the quality or set a smaller max width until the After size is under your limit. For a fixed size like 50 KB, the Photo Resizer has a target size option.
Will compressing reduce quality?
Slightly, but at 70–80% the difference is hard to see. You can compare before downloading.
Are my images uploaded?
No. Compression happens in your browser and no image is sent to a server.
What is the best format for small files?
WebP usually gives the smallest file at the same quality and works in all modern browsers.