Image Compressor
Compress JPEG, PNG, or WebP images by adjusting quality. See file size reduction instantly.
Examples
| Input | Result |
|---|---|
| A 4.2 MB JPEG photo compressed at 80% quality | 1.1 MB JPEG (74% reduction) |
| A 2.8 MB PNG screenshot compressed at 60% quality | 680 KB JPEG output |
| A 1.5 MB product photo compressed at 90% quality | 520 KB JPEG with minimal visible difference |
| A 6 MB camera photo compressed at 50% quality | 890 KB JPEG (85% reduction) |
About this tool
Image compression works by reducing the amount of data stored for each pixel. JPEG compression groups pixels into blocks and approximates color values, which is why lower quality settings produce smaller files but introduce blocky artifacts. WebP uses a more modern algorithm that typically achieves better compression at the same visual quality.
This tool runs the compression entirely in your browser using the Canvas API's toBlob and toDataURL methods. You pick a quality level from 0 to 100, and the browser handles the encoding. The preview updates in real time so you can find the sweet spot between file size and image quality before downloading.
Frequently asked questions
What quality setting should I use?
For photos on the web, 75-85% is usually a good balance between file size and visual quality. Below 60%, you will start to see noticeable JPEG artifacts. For screenshots or images with text, consider keeping quality above 85%.
Can I compress PNG files without converting to JPEG?
The browser Canvas API outputs PNG as lossless, so adjusting the quality slider only affects JPEG and WebP output. To reduce a PNG file size, you can convert it to WebP or JPEG instead.
Is there any quality loss I cannot undo?
Yes. JPEG and WebP compression is lossy, meaning some image data is permanently discarded. Always keep your original file if you might need the full-quality version later.