Privacy
Are Deleted PDF Pages Really Gone? Checking What a PDF Still Hides
You removed pages from a PDF and sent it. Where deleted content can survive inside the file, what you can check yourself, and what you can't.
Guides
Step-by-step answers to the PDF problems people actually run into, in Arabic and English documents alike. Each guide says what works, what does not, and which free tool does the job.
Signing
How to Compare PDF Versions of a Contract or CV
A new version of a contract or CV arrived as a PDF. How to see every word that changed, what a comparison can miss, and what to do before you sign.
Converting files
How Do I Open a .pub File Without Publisher?
Publisher has left Microsoft 365, and your .pub files won't open. Three free ways to open them, what each one gets wrong, and what to do with the PDF.
Scanned documents
How to Scan to PDF on iPhone, and Fix the Result
Scan paper documents to a PDF with the iPhone's own Notes or Files app, then fix what usually goes wrong: pages out of order, sideways pages and big files.
Privacy
How to Change the Author of a PDF (and Its Title)
Your name, an old colleague's or a draft title hiding in a PDF's details? See what a file says about itself, and change or clear it before you send it.
Scanned documents
How to Save a Rotated PDF Permanently on Any Device
Turned a sideways page, saved, and it flipped back? Why most viewers only turn the view, and how to keep the new direction on Windows, Mac and phones.
Privacy
What Is My Bank Statement PDF Password? How to Open the File and Keep a Copy
Your bank emailed a statement that asks for a password? Where the password usually comes from, why it fails, and how to save a copy that opens without it.
Scanned documents
How to Fix a Messy Scanned PDF: Pages Out of Order, Sideways or Blank
Your scan came out backwards, with sideways pages and empty backs? Fix it in three steps, in your browser, without scanning everything again.
Students
How Many Slides per Page to Print for Revision (and Use Less Ink)
Exam season, a pile of lectures: how many slides fit on a sheet before the text gets too small, why dark slides drain ink, and getting the file to a print shop.
Signing
Visual Signature vs Digital Signature: What a Signed PDF Can and Can't Prove
A drawn signature and a certificate-based digital signature look alike in a PDF but work differently: what each proves, and how to tell them apart.
Scanned documents
How to Combine Phone Photos of Documents into One PDF for an Online Application
Combine phone photos of your documents into one PDF for an online application: clear photos, the right order, the right way up. Free, no app needed.
Forms
How to Fill Out a PDF Form That Has No Fillable Fields
The form arrived as a PDF, but you can't click into any box. How to tell why, and how to fill it in on screen for free, including scans and Arabic.
Signing
How to Sign a PDF on Your Phone: iPhone and Android, Step by Step
Sign a PDF on your iPhone or Android phone in a few minutes, with no app and no account: open the file, draw your signature with a finger, place it, save.
Scanned documents
Why Can't I Select or Edit the Text in My PDF? Scanned PDFs Explained
Can't select, copy or edit the words in a PDF? It is usually a scan. How to tell, why it happens, and what you can still do with the file, for free.