Compress Images
Shrink large photos for a website, email or upload form. Pick output format, width and quality; see the size of each compressed file before downloading.
Compress Images
A modern browser is required; QR and PDF tools need internet to load libraries.
Selected files are never uploaded to our server.
How to use this tool
How image compression works
Most photo size comes from pixel dimensions and image encoding. Reducing very large photos to a sensible width often saves more space than aggressively lowering quality. This tool decodes your image in your own browser and exports a new JPEG or WebP file. Transparent PNG images will receive a white background when converted to JPEG, so choose WebP if transparency matters.
Choose the right balance between size and quality
Start at 80% quality and a maximum width of 1920 pixels for photos used on web pages. If small details or text look blurry, increase the quality or keep more pixels. WebP can be smaller than JPEG in many cases, but browser support and photo content affect results. Compare both the visible result and saved byte count: compression does not guarantee every output is smaller.
What happens to my photographs?
Photo files are decoded and processed locally using the browser Canvas API. No photo is uploaded to MURDILIMAX. A browser may have memory limits for very large pictures, and embedded EXIF details such as GPS location are generally not retained by Canvas exports. Keep the originals until you verify the copies. This tool is not an image backup.
Best practices for website images
For an article hero image, a well-compressed photo with an appropriate width can improve load time without losing useful details. Use descriptive alternative text and meaningful filenames. Avoid resizing tiny images upward since it increases dimensions without restoring detail. For a site that serves multiple screen sizes, prepare more than one width when practical.
Frequently asked questions
Is this a lossless compressor?
No. JPEG and WebP quality settings use lossy compression, and resizing discards pixels.
Can compression increase file size?
Yes. Depending on the input and output format, a new file may be larger. Compare before using it.