Image Compressor

Image Compressor shrinks JPG, PNG and WebP files right in your browser. Photos straight from a phone camera routinely run 4 to 8 MB, which is far more than a web page, an email attachment or an upload form needs. Dropping the quality to around 80 percent typically cuts the file to a quarter of its size with no visible difference at normal viewing distance.

How to use

1. Drop your image onto the panel above, or click it to pick a file.
2. Drag the quality slider. Start at 80 and watch the estimated output size update as you move it.
3. Compare the before and after preview at full size to confirm the detail you care about survived.
4. Download the compressed file. The original on your disk is never modified.

When you actually need this

• An upload form rejects your photo for exceeding a 2 MB or 5 MB limit — job applications, insurance claims and government portals are the usual culprits.
• Your web pages load slowly because product or blog images were exported straight from a camera or design tool at full resolution.
• An email attachment bounces off a 25 MB cap when you try to send a batch of photos.
• You are close to the storage ceiling on a cloud drive and want to keep the photos rather than delete them.

How the compression works

JPEG and WebP discard information the eye is least likely to notice, mostly fine colour variation, and the quality slider controls how aggressively that happens. Because the loss is permanent, always compress from your original file rather than re-compressing an already compressed copy — each pass compounds the artifacts. PNG works differently: it is lossless, so the size reduction comes from smarter encoding and every pixel is preserved exactly, which makes it the right choice for screenshots, logos and anything with sharp text.

Related tools

FAQ

Are my photos uploaded to a server when I use Image Compressor?

No. Image Compressor reads the file with the browser's Canvas API and processes every pixel on your own device. The image never leaves your computer, which is why it still works if you go offline after loading the page.

Will Image Compressor reduce the quality of my image?

That depends on the setting you choose. JPEG and WebP are lossy, so a lower quality value means a smaller file and more visible artifacts; PNG is lossless and keeps every pixel exactly. Start around 80 percent quality — most photos stay visually identical at roughly a third of the original size.

Is there a file size or count limit?

There is no limit imposed by the site, because nothing is uploaded. The practical ceiling is your device's memory — very large files (over roughly 50 MP) may be slow on an older phone.

Read the full guide: how to use Image Compressor step by step →