Which format should I pick?

PDF

Documents that must look identical on every device, and for printing.

DOCX

Documents someone still needs to edit.

JPG

Photographs — small files, great for sharing.

PNG

Screenshots, logos and graphics with sharp edges or transparency.

WEBP / AVIF

Images for websites — smaller than JPG at the same quality.

MP4

Video that plays everywhere.

MP3

Audio that plays everywhere.

CSV

Table data to move between apps.