What is this tool?
Compress and optimize JPEG, PNG, and WebP images directly in your browser. Configure compression quality levels and maximum dimension limits while previewing file size savings in real time.
When to use it?
Optimize website images for faster page load times, compress photos for email attachments, reduce profile picture sizes, or save storage space.
How does it work?
Draws the uploaded image into an HTML5 Canvas context and re-encodes the pixel buffer using Canvas.toBlob with adjustable quality parameters (0.0 to 1.0) and bilinear downscaling.
Technical Specifications & Standards
JPEG and WebP encodings utilize lossy discrete cosine transform (DCT) and arithmetic compression algorithms. PNG optimization uses palette reduction and canvas re-encoding.
Operating Limits & Considerations
- Compressing transparent PNGs with lossy JPEG output will replace transparent backgrounds with black or white. Use WebP or PNG format to preserve transparency.
- Images exceeding 40 Megapixels may hit browser Canvas memory constraints on mobile devices.
Example Conversions
Input: photo.jpg (3.2 MB), Quality: 80%
Output: photo_compressed.jpg (720 KB - 77% reduction)
Frequently Asked Questions
WebP offers superior compression compared to JPEG and PNG, delivering 25%–35% smaller file sizes at equivalent visual quality with full transparency support.
By default, compression adjusts encoding quality while preserving original pixel dimensions. You can optionally set maximum width/height constraints to scale the image down.