Image compression guides

JPEGs can be saved so they load top to bottom, or as a blurry preview that sharpens.

Run through this list before you upload.

On Windows, a browser-based compressor avoids installing extra software.

WebP is newer than JPEG and often smaller, but compatibility still matters.

An upload error is frustrating when the message is vague.

Good file names help you, your team and search engines.

A repeatable workflow saves time and keeps results consistent.

Colours that look vivid on your camera can look dull after upload if profiles are mishandled.

Hitting an exact size limit is easier with a target-size compressor.

Mac users can compress JPEGs without opening Preview or Photoshop.

Choosing the wrong format can make a file five times larger than it needs to be.

Short on time? Here is the fastest route.

Many online compressors upload your images to a server. That is not always necessary.

The honest answer is: more than you think.

Colours that look vivid on your camera can look dull after upload if profiles are mishandled.

Yes, but how much depends on your settings.

Mac users can compress JPEGs without opening Preview or Photoshop.

Resizing is the single biggest lever for file size.

Getting a JPEG ready for online forms is mostly about two numbers: pixel width and file size.

Many online compressors upload your images to a server. That is not always necessary.

Image compression comes in two flavours.

Speed is the most visible benefit of compression.

Blurriness after compression usually comes from resizing too far, not from JPEG itself.

Strictly speaking, JPEG compression always discards something, but you can make the loss invisible.