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30 practical guides

PDF guides for real jobs

Each guide answers one specific question, walks through it step by step with the right tools, and explains what is going on underneath, so you know what to check before you send the file.

Convert to PDF

Getting photos, Office files, emails, Markdown and spreadsheets into a PDF that looks right everywhere.

Convert from PDF

Getting text, tables and images back out of a PDF, including scans, so you can edit and reuse them.

Organize

Merging, splitting, rotating, cropping and tidying pages, all on your own device.

Optimize & secure

Making PDFs smaller, signed, locked, unlocked, archive-ready and printer-friendly.

Optimize & secure

Compress a PDF Under 10 MB for Email

Shrink a PDF below 10, 20 or 25 MB so it attaches to Gmail or Outlook. Why limits are lower than they look, and what to do if a file won't shrink.

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Optimize & secure

Make a PDF Smaller Without Losing Quality

Reduce a PDF's file size while keeping text sharp and photos clean. What lossless and lossy savings really are, and which compression level to pick.

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Optimize & secure

Remove a Password From a PDF You Can Open

Remove the password from a PDF when you already know it, so it opens without prompting. Open passwords vs permission passwords, and when to keep one.

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Optimize & secure

Sign a PDF Without Printing It

Add your signature to a PDF without printing, signing and scanning. Draw, type or upload it, place it on the line, and keep the file on your device.

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Optimize & secure

PDF/A for Archiving and Court Filing

Convert a PDF to PDF/A-2 for archives, records systems and e-filing portals. What PDF/A requires, what gets removed, and how to check a file passes.

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Optimize & secure

Add Page Numbers to a Thesis PDF

Number the pages of a thesis or dissertation PDF, including starting the count after the title page and front matter. Step-by-step with free tools.

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Optimize & secure

Flatten a Filled PDF Form So It Can't Be Edited

Lock a filled-in PDF form so the answers can't be changed and show the same in every app. What flattening does, and what it doesn't protect against.

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Optimize & secure

Grayscale a PDF to Cut Printing Costs

Convert a colour PDF to grayscale before printing to save colour toner and get predictable black-and-white output. What changes and what doesn't.

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Optimize & secure

Repair a PDF That Won't Open

Fix a PDF that shows an error, blank pages or won't open at all. What usually breaks inside a PDF, what can be recovered and what can't.

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Optimize & secure

Password-Protect a PDF Before Emailing It

Encrypt a PDF with a password before you email it, using AES-256. How to choose and share the password so the protection actually means something.

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Optimize & secure

Make a Scanned PDF Searchable with OCR

Add a hidden text layer to a scanned PDF so you can search, select and copy text, while the page looks exactly the same. Tips for better OCR results.

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