ResizeTool learning center
Image and document preparation guides
Practical notes for preparing files for forms, websites, print, and sharing. Each guide explains the tradeoffs behind the settings so you can choose the right output for your use.
Compress an image to a file-size limit
Choose the required format and dimensions first, then reduce quality or pixel dimensions until the file fits. A target size is a maximum, not a promise that every image can reach it without visible changes.
Understand image dimensions and aspect ratio
Pixel dimensions control detail and shape. Learn how to keep proportions when resizing and estimate print dimensions at a chosen DPI.
Choose JPG, PNG, or WebP
Pick a format based on transparency, photo detail, compatibility, and the destination.
Prepare a PDF for sharing
Learn what browser-based conversion changes, how to check the result, and why a smaller PDF may trade away selectable text or fine detail.
Open the tools
Use the image utilities for aspect-ratio and print-size calculations, image details, palette sampling, and simple text watermarking. The main workspace contains resizing, compression, crop, conversion, and PDF tools.