How to use the Image Compressor
- 1
Click “Choose images” or drag one or more JPG, PNG or WebP files into the drop zone.
- 2
Pick an output format and move the quality slider — 70–80% is a good starting point for photos.
- 3
Optionally set a maximum width to downscale very large photos at the same time.
- 4
Press “Compress”, compare the original and new sizes, then download each file or all of them at once.
Features & benefits
Batch compression
Process up to 20 images in a single pass and download them together as a ZIP archive.
Live savings report
See the exact number of kilobytes saved and the percentage reduction for every file.
100% private
Compression happens on your device using the browser's canvas encoder — nothing is uploaded.
Smart format choice
Keep the original format or switch to WebP, which is typically 25–35% smaller than JPEG at similar quality.
How image compression works
Lossy formats such as JPEG and WebP save space by discarding detail the human eye is unlikely to notice — subtle colour variations in skies, for example, or fine noise in shadows. The quality setting controls how aggressively that detail is removed. At around 75% most photos look identical to the original on a typical screen while weighing a fraction of the size.
PNG is a lossless format, so lowering “quality” has no effect on a PNG output. If you need a much smaller PNG, try resizing it or converting it to WebP. For screenshots and graphics with flat colours, WebP at high quality usually beats both PNG and JPEG.
For web pages, aim for hero images under 200 KB and thumbnails under 50 KB. Smaller images directly improve Largest Contentful Paint, one of Google's Core Web Vitals.
Frequently asked questions
Are my images uploaded to a server?
No. The compressor uses the canvas API built into your browser, so the files are read, re-encoded and offered for download entirely on your own device.
Why did my PNG barely get smaller?
PNG is lossless, so the quality slider cannot remove detail. Choose JPEG or WebP as the output format, or reduce the image dimensions, to get a much smaller file.
Is there a file size limit?
Each image can be up to 50 MB. Very large images depend on your device's memory, so on older phones it is best to process them one at a time.
Does compression remove EXIF metadata?
Yes. Re-encoding through the canvas strips camera metadata such as GPS location, which is a nice privacy bonus when sharing photos online.