Compress4 min read
How to Compress a PDF to 100KB Without Losing Quality
Government and exam portals reject anything over 100KB. Here is what actually shrinks a PDF, in the order worth trying.
PDF Guides & Tutorials
Tips, tricks, and step-by-step instructions for working with PDF documents, image conversion, and file optimization.
These guides cover the document problems people actually get stuck on: an exam portal that refuses anything over 100 KB, an iPhone that saves photos in a format Windows cannot open, a contract revision that needs checking line by line, and a bank statement that should not travel unencrypted. Each one explains what is really going on underneath, not just which button to press — because knowing why a file is too large tells you what to do when the obvious fix does not work.
Convert4 min read
How to Convert JPG Images to PDF on iPhone, Mac and Windows
Combining photos into one PDF is the most common document task there is. The details that trip people up are page order and HEIC.
Organise3 min read
How to Combine Multiple PDF Files Into One Document
Merging is simple until one file is encrypted or a different page size. Here is how to handle both.
Secure5 min read
How to Password Protect and Encrypt a Sensitive PDF
PDF encryption is genuinely strong. PDF permissions are not. Knowing the difference matters when the document is sensitive.
Check6 min read
How to Check if a PDF Is Accessible (and Fix What Fails)
Most inaccessible PDFs fail for the same three or four reasons. Here is how to spot them in a minute, and how to fix them properly.
Check5 min read
Why Black-Box Redaction Fails, and How to Check Yours
A black rectangle hides words on screen and leaves them in the file. Here is how redactions leak and how to make sure yours does not.
Organise4 min read
How to Save One Page of a PDF (Windows, Mac and iPhone)
You need page 7 on its own, not the whole 40-page file. Every computer and phone can already do it; here is how on each.
Organise4 min read
How to Add Pages to a PDF (Free, No Acrobat)
Adding a page to a PDF really means combining two PDFs. Here is how to put the new pages exactly where you want them.
Compress5 min read
File Too Big to Upload? How to Make a PDF Smaller
The upload form says your file is too large. Here is why that happens with PDFs, and the fastest way to get under the limit.