Image Compressor
Shrink an image's file size with an adjustable quality slider — processed locally, never uploaded.
Drag & drop an image here
or browse your files — PNG, JPG, or WebP
How image compression works here
This tool decodes your image in the browser, draws it to a canvas, and re-encodes it as JPEG or WebP at the quality level you choose using the canvas.toBlob() API. Lower quality values apply stronger lossy compression — smaller file, less fine detail — while higher values stay closer to the original at a larger size. The before-and-after comparison lets you find the sweet spot for your use case.
PNG files are lossless and don't have a quality slider in the same way, so if your source file is a PNG, this tool will re-encode it to JPEG or WebP to actually shrink it. If you need to keep PNG output, use the Image Converter instead and note that PNG file size mostly depends on image complexity rather than a quality setting.
When to compress an image
- Speeding up a website by shrinking oversized photos
- Fitting an attachment under an email or form's file size limit
- Saving storage space for photo libraries or backups
- Preparing images for faster page loads on mobile connections
Frequently asked questions
Which format compresses better, JPEG or WebP?
WebP generally produces smaller files than JPEG at a similar visual quality, but JPEG has broader compatibility with older software. Try both and compare the resulting sizes shown by this tool.
Will I lose image quality?
Yes, to some degree — JPEG and WebP compression at less than 100% quality are lossy, meaning some detail is discarded to reduce file size. Use the slider to balance size versus visual quality for your needs.
Is my image uploaded to compress it?
No. Compression happens entirely in your browser via the Canvas API. The file never leaves your device.