Image compression guides

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

The honest answer is: more than you think.

Speed is the most visible benefit of compression.

Yes, but how much depends on your settings.

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

Resizing is the single biggest lever for file size.

There is no single magic number, but there is a sensible range for Pinterest pins.

Size limits are written in kilobytes and megabytes, and the units trip people up.

Image compression comes in two flavours.

You do not need paid software to compress images well.

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.

A few habits cause most of the blurry or oversized images we see.

There is no single magic number, but there is a sensible range for DSLR photos.

Size limits are written in kilobytes and megabytes, and the units trip people up.

Text inside photos, like signs or slides, needs a gentler touch.

You do not need paid software to compress images well.

Photos carry hidden metadata such as camera model, date and sometimes GPS location.

When you have dozens of images, consistency matters as much as size.

You do not need an app to shrink photos on an iPhone.

Quality is the slider people touch first, yet it is often the least understood.

Aspect ratio is the shape of the image, and the wrong one leads to awkward crops.

Faces are where viewers notice compression first.

Screenshots behave differently from photos.