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PDF guides & tutorials
Practical guides on compressing, merging, converting, and organising PDF files — all runnable free in your browser.
Guides
See allConvert PDF to JPG: Complete Guide
Everything you need to know about turning PDF pages into JPG images — resolution, quality, batch conversion, and when not to do it.
May 11, 2026
How to Compress a PDF Without Losing Quality
Learn the techniques behind PDF compression and how to shrink your files without making them look bad — all free in your browser.
May 11, 2026
PDF File Format Explained: A Beginner's Guide
What a PDF actually is, how it became the universal document format, and the parts of the spec you'll actually encounter — explained in plain language.
May 11, 2026
Why Are PDF Files So Large? And How to Fix It
A clear breakdown of what makes PDFs bloat — embedded fonts, raster images, metadata — and which fixes actually shrink them.
May 11, 2026
Tutorials
See allConvert iPhone Photos to PDF: 3 Ways
Turn iPhone photos into a single PDF — using the Files app, the Print menu trick, or a browser tool that doesn't upload anything.
May 11, 2026
How to Add Page Numbers to a PDF
A practical guide to adding page numbers to a PDF — positioning, formatting, starting offsets, and avoiding common mistakes.
May 11, 2026
How to Combine Multiple PDFs Into One File
Merge two, ten, or fifty PDFs into a single file — in your browser, in seconds, with no upload required.
May 11, 2026
How to Watermark a PDF (And Why You Should)
A practical guide to watermarking PDFs — when it's worth doing, what watermarks can and can't protect, and how to add one in your browser.
May 11, 2026
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