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JPEG and PNG are the two most common image formats. Here's exactly when to use each, what the tradeoffs are, and how file size compares.

HEIC is Apple's photo format since iOS 11. Here's why it exists, what makes it better than JPEG, and why it causes compatibility headaches.

A clear comparison of MP4, MKV, and MOV — the three most common video container formats — with guidance on when to use each.

Fix sideways or upside-down images in seconds. Rotate photos 90°, 180°, or any angle — free, browser-based, no software needed.

Extract specific pages or divide a large PDF into separate files — no Acrobat needed. Free, instant, works in any browser.

Convert PNG images to JPG in seconds — reduce file size without visible quality loss. Free, browser-based, no software needed.