The AXS PDF glossary

Plain-English definitions of the terms you meet when working with PDFs and images.

OCR (Optical Character Recognition)

OCR is technology that reads text from images and scanned documents and turns it into real, editable, searchable text.

A PDF is a file format that shows a document exactly the same way on any device — text, images and layout preserved.

WebP is a modern image format from Google that gives smaller files at the same quality as JPG or PNG.

HEIC is the high-efficiency image format iPhones use to save photos at half the size of JPG.

Base64 is a way to represent binary data (like an image) using plain text characters.

A QR code is a square barcode that a phone camera can scan to open a link or read text instantly.

PDF compression reduces a PDF's file size by optimizing images and removing redundant data.

A transparent background is an image with no background color, so whatever is behind it shows through.