Guides

Short guides that explain the tools on this site — what makes a PDF big, and which image format to use when.

How to Compress a PDF — what makes a PDF big, and what actually shrinks it.
Image Formats Explained: PNG vs JPG vs WebP — which format to use, with real file sizes from one test photo.

All the tools

Merge PDF • Split PDF • Compress PDF • PDF to JPG • Image Resizer • Image Compressor • Image Converter • Unit Converter • Age Calculator • Percentage Calculator • BMI Calculator • Word Counter • Password Generator

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