DoPDF Blog

Simple guides for working with PDF files.

How to add page numbers to a project report or thesis PDF

Colleges expect numbered pages in project reports and theses. Here's how to add them to a finished PDF, including skipping the cover page.

How to compress a PDF to under 100 KB for online application forms

Government job, exam and scholarship portals often limit uploads to 100 KB or 200 KB. Here is how to shrink your PDF without making it unreadable.

Why you should send your resume as a PDF (and how to convert it)

Recruiters open resumes on many different devices. A PDF looks exactly as you designed it. Here's how to convert your Word resume in seconds.

How to put Aadhaar front and back in one PDF

Many forms ask for both sides of your Aadhaar card in a single PDF. Here is the quickest way to do it on your phone or computer.

When and how to password-protect a PDF

Sending ID proofs, salary slips or medical reports? Adding a password protects them if the email or link reaches the wrong person.

How to make a PDF small enough to email

Gmail and most email services limit attachments to about 25 MB. Here's how to shrink a large PDF, or send it another way.

How to scan documents to PDF with your phone (no app needed)

You don't need a scanner or an app to make a clean PDF of a paper document. Here is how to do it from your phone's browser.

How to sign a PDF without printing it

Print, sign, scan, send: there's an easier way. Draw your signature and add it to any PDF from your phone or computer.

Split PDF vs Extract pages: which one do you need?

Both tools take pages out of a PDF, but they give different results. Here's how to choose, with examples.

How to make a scanned Tamil or English PDF searchable (OCR)

Scanned PDFs are just pictures. OCR adds real text so you can search, copy and select it. Here's how it works for Tamil, English and Hindi documents.

How to remove the password from a bank statement PDF

Bank statements and salary slips usually come password-protected. If you know the password, you can save a copy without it in a few seconds.

What is PDF/A and when do you need it?

Some courts, universities and government offices ask for PDF/A files. Here's what the format is, why it exists and how to convert your PDF.