Guides
Background reading for the jobs the tools do: which format to pick, why files are the size they are, and what the settings actually change.
Image formats explained: JPG, PNG, WebP, AVIF, GIF, BMP and ICO
Which format to use for photos, logos, screenshots, web pages, print and social, and why.
Read the guideHow to reduce the size of a PDF
Diagnose why a PDF is large, then shrink it the right way for email limits, portals and storage.
Read the guideWhy processing files in your browser is more private than uploading them
What happens to your file on a normal converter site, how on-device processing works, and how to verify it.
Read the guideImage sizes for websites, email and social media
A reference table of pixel dimensions and ratios for web pages, link previews, email and every major social platform.
Read the guideZIP, GZIP, TAR, 7z and RAR explained
What each archive format does, where it opens without extra software, and which one to use for a given job.
Read the guideHow to compress a video for WhatsApp, email and the web
The size limits on each platform, what resolution and bitrate do, and settings that get a clip under the limit.
Read the guide