Guides & Tutorials
Straightforward, practical guides for getting the most out of your images and PDFs. Every technique here works with Aaroka's free browser-based tools — no uploads, no software to install.
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How to Compress a PDF Without Losing Quality
Lossless vs lossy PDF compression, why files get large, and how to shrink them safely.
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How to Reduce Image Size to Under 100 KB
Hit strict upload limits for forms and job portals without ruining quality.
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How to Resize an Image for Instagram
Exact sizes for posts, stories and profile pictures — and how to avoid cropping.
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JPG vs PNG vs WebP: Which Should You Use?
A simple comparison of size, quality and transparency to pick the right format.
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How to Convert Images to PDF on Any Device
Combine photos into one tidy PDF from your phone, tablet or desktop.
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How to Compress Images for a Faster Website
Reduce image weight to speed up your site and improve Core Web Vitals.
Start with a tool
Every guide links to a free tool that runs entirely in your browser: