Guides & Help

Step-by-step instructions for PDF tasks — tools and longer articles. The tool pages now include an Under the hood section that names the actual engine and its limits.

PDF Basics

How to merge PDF files online — Combine multiple PDFs into one document in seconds. No software needed. (tool)
How to compress a PDF without losing quality — Reduce file size while keeping text and images sharp. Choose the right compression level. (article)
Why your PDF won't compress — and how to fix it — Why some PDFs barely shrink (or grow) when compressed, and the right way to get a smaller file. (article)
How to share a large PDF when email rejects it — Why attachments bounce below the advertised limit, what actually shrinks a PDF, and when to send a link instead. (article)
How to fix a corrupted PDF you can't open — Most PDFs that refuse to open are fixable in seconds. Practical repair strategies ranked from least to most invasive. (article)
How to sign a PDF on iPhone or iPad — iOS has built-in PDF signing through Markup. The practical workflow, the cases where it falls short, and what to do when it does. (article)
How to split a PDF into separate pages — Extract individual pages or ranges from any PDF document. (article)
How to reorder and remove PDF pages — Rearrange pages, delete the ones you do not need, and fix the double-sided-scan shuffle in one pass. (article)
How to edit a PDF online — Edit text, move content, and change fonts directly in any PDF — no software needed. (article)
How to rotate PDF pages — Fix upside-down or sideways pages in any PDF. (tool)
How to protect a PDF with a password — Add encryption to prevent unauthorized access to your documents. (tool)
How to unlock a PDF and remove the password — Remove encryption from a PDF you have the password for — and why other tools refuse the file until you do. (article)

Converting Files

How to convert Word to PDF — Convert .docx, .doc and other Office files to PDF without Microsoft Office. (tool)
How to convert PDF to Word — Extract text from PDF into an editable Word document. (tool)
How to convert PDF to Excel — Extract tables and structured data from any PDF into an editable spreadsheet. (tool)
How to convert PDF to Excel without losing your tables — Why copy-paste mangles tables, when AI extraction helps, and how to handle merged cells and scanned tables. (article)
PDF vs Word — which format should you use? — Understanding when to use PDF vs Word saves time and prevents formatting problems. (article)
How to convert images to PDF — Combine JPG, PNG and other images into a single PDF document. (tool)
How to convert CSV to Excel — Open CSV files in Excel with proper formatting and styled headers. (tool)

AI Features

What is OCR and why does your scanned PDF need it? — Understand how optical character recognition makes scanned documents searchable. (article)
How to summarize a PDF with AI — Get a clear summary of any document in seconds using AI. Pro feature. (tool)
How to translate a document with AI — Translate PDFs and Word files to any major language instantly. Pro feature. (tool)
How to redact sensitive information from a PDF — Permanently remove names, numbers and private data from documents. Pro feature. (tool)
How to analyze a contract with AI — Get a plain-English breakdown of legal documents, risks and obligations. Pro feature. (tool)

Privacy & Security

Privacy and security of online file conversion — What happens to your files when you upload them to PDFwarp. (article)
How to password protect a PDF — Add encryption to sensitive documents before sharing them. (tool)
How to unlock a PDF and remove the password — Remove encryption from a PDF you already have the password for. Free tool, no cracking. (article)
How to remove a password from a PDF — Unlock encrypted PDFs when you have the original password. Free tool. (tool)