Image Compressor - Free Online Tool
Image Compressor
Shrink Image File Size in Your Browser
Drag & drop an image, or click here
Understanding Image Compression
Faster Websites
Smaller image files mean faster page loads, which improves both user experience and search ranking.
Adjustable Quality
Trade off file size against visual quality with a simple slider — lower quality means a smaller file.
JPEG Re-Encoding
Output is re-encoded as JPEG, which typically compresses photographic images far better than PNG.
Local Processing
Compression happens entirely in your browser using the Canvas API — your image is never uploaded.
Lossy vs. Lossless Compression
This tool uses lossy JPEG compression, which discards some image detail to achieve a much smaller file size — ideal for photos where minor quality loss isn't noticeable. If you need to preserve every pixel exactly (e.g. screenshots with text or line art), a lossless format like PNG is a better fit even though the file will be larger.
Key Takeaways
- Quality Slider: Choose the balance between file size and visual quality that works for your use case.
- Size Comparison: See the original and compressed file sizes side by side, including percentage reduction.
- Client-Side Only: All compression happens locally in your browser — no data is ever sent to a server.