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Guides and tips for PDFs and images

Practical, step-by-step help for everyday document jobs: shrinking files, combining scans, choosing image formats and keeping your files private.

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Image guides How to Resize Images for WhatsApp, Instagram and Websites The right image sizes for Instagram posts and stories, website banners and profile photos, and how to resize without losing quality. October 31, 2026 · 2 min read

Privacy and safety Are Online PDF Tools Safe? What Really Happens to Your Files Many free converters upload your documents to a server. Learn the difference between upload-based and in-browser tools, and a simple test to check any site. October 31, 2026 · 3 min read

PDF guides How to Turn Photos of Documents into One PDF Took pictures of your ID card, certificates or assignment pages? Here's how to put them into a single, tidy PDF that offices and teachers will accept. October 31, 2026 · 3 min read

Image guides JPG vs PNG vs WebP: Which Image Format Should You Use? A plain-English guide to the three most common image formats: what each one is good at, when to avoid it, and how to switch between them. October 31, 2026 · 3 min read

PDF guides How to Merge PDF Files on Your Phone or Computer Combine several PDFs into one file in the right order, on Android, iPhone, Windows or Mac, without installing anything. October 31, 2026 · 3 min read

PDF guides How to Reduce PDF File Size for Email and Upload Forms Your PDF is too big to email or upload? Here's why PDFs get heavy, how to shrink them for free, and how to pick the right compression level. October 31, 2026 · 3 min read