Image compression guides

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 scanned receipts.

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.

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

If an upload keeps failing, the image is usually larger than it needs to be in more ways than one.

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

Reducing file size is a sequence, not a single click.

iPhones save photos as HEIC by default, and not every site accepts it.

Faces are where viewers notice compression first.

Scanned pages are often saved at very high resolution.

Dimensions decide how sharp an image looks and how heavy it is.

Run through this list before you upload.

Android phones can compress images right in the browser.

Reducing file size is a sequence, not a single click.