Guides
The tools handle the doing. These explain the choosing: which format, which size, and what you give up either way.
All guides
PNG vs JPG vs WebP
Which format to save in, what each one throws away, and when the "best" choice is the old one.
What image size for email
Real attachment limits for Gmail, Outlook and iCloud, and the dimensions that still look sharp after you shrink.
Why is my photo so large?
Why a phone photo is 8 MB when a screenshot of it is 400 KB, and which lever to pull for each cause.
Why these exist
Most questions people bring to an image tool are not about the tool. They are about a decision: is this small enough to email, will PNG look better than JPG here, why is this photo so big in the first place. A slider cannot answer those.
Each guide is written to answer one of them and then hand you to the tool that does the work.
Last reviewed . Something out of date or wrong? Tell Kobra IMG.