A PDF is useful when you want a document to look much the same on another device. It can preserve page layout, fonts and pictures more reliably than sending an editable word-processing file. You might use one for a CV, invoice, form, report or set of scanned pages.
You do not usually need to purchase specialist software just to create one. Windows, macOS, Microsoft Office and many phone applications can save or print documents to PDF. The method depends on whether you're starting from text, a photograph or a collection of papers.
Know when PDF is the right choice
PDF is a good format for a finished document you want people to read, print or archive. It is less convenient when several people need to keep rewriting the same text.
If someone asks for a CV as PDF, exporting from Word or another editor normally makes more sense than scanning a printed CV. The text may remain selectable and the file is likely to be clearer.
Keep the original editable document too. If you need to correct a date next week, editing the source and exporting again is often easier than trying to modify the PDF.
Create a PDF from Word
Open the document in Word and look for Save As or Export, then select PDF as the file type. Microsoft provides this option in supported Word versions.
Choose a destination folder and a meaningful filename before saving. If you are offered print-quality or minimum-size options, match the choice to how the file will be used.
After exporting, open the PDF and inspect it. Check headings, tables, images and page breaks rather than assuming it matches the editing view perfectly.
Use Print to PDF in Windows
Windows provides a Microsoft Print to PDF facility in many applications. Open the file, choose Print and select Microsoft Print to PDF as the printer.
Check page range, orientation, scaling and paper size. Click Print, then choose where the PDF should be saved when prompted.
This creates a document file instead of sending paper to a physical printer. The name can be confusing, but you are not wasting sheets or ink.
Convert a webpage into a PDF
In a browser such as Chrome or Edge, open the page and select Print. Choose Save as PDF or the equivalent PDF destination.
Use the print preview to check whether menus, adverts or sidebars make the page difficult to read. Some sites offer a printer-friendly view that works better.
Do not assume that everything visible on screen will appear in the PDF. Interactive maps, videos and content loaded only after scrolling may not print meaningfully.
Make a PDF from a photograph
On a phone or computer, some gallery or print workflows allow you to save an image as a PDF. This is useful for receipts or single-page forms.
Check that the photo is upright, sharp and not cropped through the edges of the document. A blurry photograph placed inside a PDF is still blurry.
If the document contains confidential information, use a trusted local or approved scanning workflow rather than sending the photo through an unknown converter.
Scan paper pages into one PDF
Modern phone scanning apps can detect page edges, straighten images and combine several photographed pages into a PDF. Dedicated office scanners often offer a similar feature.
Place each page on a flat contrasting surface with even light and avoid shadows. Inspect small print and signatures before saving.
Keep pages in the correct order. For a ten-page agreement, a missing page is more serious than whether the scan looks slightly warm in colour.
Make multiple pages appear correctly
When creating a PDF from several images, check the page sequence, rotation and dimensions. You may prefer A4 portrait pages for a UK business document.
Don't squeeze a wide landscape chart onto a narrow page until its text becomes microscopic. Use a suitable layout or landscape page where necessary.
If exporting from a word processor, use page breaks and margins deliberately. Repeated blank pages can result from accidental breaks or oversized tables.
Preserve selectable text
A PDF exported directly from Word or another digital editor often includes selectable text. A PDF made from photos contains page images unless OCR is added.
Selectable text can help accessibility and searching. For important documents, use a tagged or otherwise accessible export option where supported.
OCR can make scans searchable but sometimes misreads characters. Always inspect the actual page image and verify names and numbers rather than trusting recognised text blindly.
Add a password only when appropriate
Some PDF tools can encrypt a file with a password. This may help protect sensitive content, but not all applications provide the same security features.
Share the password through a separate trusted channel where appropriate. Don't place the password in the same email as the protected document.
Remember that a password doesn't prevent every form of copying or misuse after someone has opened the file. Follow organisational requirements for confidential material.
Check the PDF's file size
Photographs and scanned pages can produce very large PDFs. If the document is too big to email, you may need to reduce image resolution or use a PDF optimisation feature.
Keep enough clarity for all important text. A smaller file is not an improvement if signatures or small numbers become unreadable.
If you still have the editable source, optimising its pictures before exporting often gives more control than repeatedly compressing the finished PDF.
Avoid unexpected layout changes
Different fonts and applications can affect line breaks before export. If the PDF has missing symbols, unexpected blank pages or a shifted footer, go back to the source.
Use print preview or the program's export settings to inspect the output. Pay attention to tables that cross page boundaries.
When the PDF is destined for professional printing, choose suitable page dimensions and ask the printer about any required bleed, colour or image specifications.
PDF from Excel or a spreadsheet
Select the correct print area, paper size and scaling before export. Wide sheets can become unreadable if forced onto one portrait page.
Use landscape orientation, repeat header rows where appropriate and consider separate pages for logical sections.
Check that hidden columns, notes or confidential worksheets are not accidentally included. Exporting the entire workbook may reveal more information than intended.
Can you edit the finished PDF?
Some PDFs permit comments, form filling and editing with suitable software. Others may be flattened, restricted or composed entirely of images.
For routine revisions, edit the source and export another PDF. Save it as a new version when previous recipients might need to compare changes.
Do not assume renaming a Word file from .docx to .pdf converts it. Use the application's proper export or print function.
Handle signatures and official forms carefully
Some official forms require a particular PDF version, fillable fields or digital signature method. Follow the organisation's instructions rather than exporting a screenshot.
If a document already has a cryptographic digital signature, modifying or recreating it may invalidate that signature. Preserve the signed original.
For a handwritten signature image, check the recipient's requirements and the security implications. A pasted signature graphic is not always equivalent to a verified digital signature.
The basic steps worth remembering
Create the document in a suitable application, choose Export to PDF or Print to PDF, set the page options and save. Open the resulting file and check its appearance, completeness and readability.
Keep the editable original in a sensible folder. A PDF is a useful finished format, but the best workflow makes it easy to produce a corrected one when necessary.