Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
USAGE SUMMARY
"pdf" is a correct and usable word in written English that refers to a Portable Document Format (PDF).
You can use it when referring to a type of computer file. For example: "This document is available as a pdf file on our website."
✓ Grammatically correct
News & Media
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
60 human-written examples
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News & Media
Furthermore, the United Nations office on drugs and crime recently released an Implementation guide and evaluative framework (pdf) for Article 11 of the UN convention against corruption.
News & Media
The WHO's essential medicines committee has rejected an application from Novartis to have the expensive licensed drug Lucentis added to the list of drugs all countries should stock (PDF).
News & Media
The most visible is Hanoi's transportation sector, which shifted dramatically (pdf) from bicycle to motorbike and now to car over the last twenty years.
News & Media
In a letter sent to more than 1,000 Islamic leaders (pdf), Pickles stressed that he was proud of the way Muslims in Britain had responded to the Paris terror attacks, but added that there was "more work to do" in rooting out extremists and preventing young people being radicalised.
News & Media
4. Can't people just read the Cabinet Manual (PDF), which is pretty clear on the rules? 5. Ed, speaking in 2010 makes it clear too, doesn't he? 6. Can we not all just agree, then, that a government is formed when a majority in the Commons passes a vote of confidence? 7. The SNP probably wouldn't dare to vote down a Labour Queen's Speech and therefore isn't Ed Miliband right to call their bluff?
News & Media
The evidence that confirms the neglect of adolescent girls in policy and development practice is clear, considerable, and pretty damning (pdf).
News & Media
The government's mid-year review of the economy (pdf) in December states gleefully that "a dramatic change seems to have happened to rural labour markets since 2012 because wage growth has plunged.
News & Media
For a copy of the report, please go to Fatal Journeys: Tracking Lives Lost During Migration (pdf).
News & Media
Huge debt relief to Burma was behind much of the fall in aid to LDCs, the OECD said in its annual report (pdf).
News & Media
In December, Gordon Brown, the former UK prime minister, launched a campaign against child labour (pdf) in an effort to reach the millennium development goal of universal primary education by 2015, which Brown's education for all initiative supports.
News & Media
Expert writing Tips
Best practice
When using "pdf", ensure the context makes it clear you are referring to a file format. Providing a link to download a "pdf" is a common and helpful practice.
Common error
Avoid using "pdf" when you actually mean a different document format like DOCX or TXT. Always verify the file type before referencing it as a "pdf".
Source & Trust
92%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The acronym "pdf" functions as a noun or an adjective to describe a file in Portable Document Format. As Ludwig AI explains, it's a standard for electronic documents. The examples illustrate its use in contexts where documents are available for download or reference.
Frequent in
News & Media
100%
Less common in
Science
0%
Formal & Business
0%
Encyclopedias
0%
Ludwig's WRAP-UP
The term "pdf", short for Portable Document Format, is a ubiquitous acronym used to refer to a specific type of digital document. As confirmed by Ludwig AI, its primary function is to identify file format, ensuring consistent presentation across different devices and operating systems. It's grammatically correct and very commonly used, especially in news and media contexts. When using "pdf", ensure that the context clearly indicates a file in Portable Document Format is being referenced. Use phrases such as “"pdf file"” or “"pdf document"” for clarity.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
Portable document format
Spells out the acronym, providing the full name of the file format.
PDF file
Explicitly states that "pdf" refers to a file.
PDF document
Specifies that "pdf" is a type of document.
Adobe Acrobat document
Refers to the document type associated with Adobe Acrobat software.
Digital document
A broader term that encompasses "pdf" as one form of digital document.
Electronic document
Similar to digital document, indicating the document is in electronic format.
Scanned document
Implies a "pdf" created from a scanned physical document.
Convert to PDF
Describes the action of changing a file to the "pdf" format.
Save as PDF
Describes the action of saving a file in "pdf" format.
Export to PDF
Describes the action of exporting data or a file to "pdf" format.
FAQs
How to use "pdf" in a sentence?
You can use "pdf" to refer to a file in Portable Document Format, for example: "The report is available as a "pdf file"" or "Please "download the pdf" version of the manual".
What does "pdf" stand for?
"Pdf" stands for Portable Document Format, a file format developed by Adobe to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems.
Which is correct, "pdf file" or "pdf format"?
"Pdf file" is generally used to describe the document itself, whereas "pdf format" refers to the way the data is structured within the file.
What can I say instead of "pdf"?
Depending on the context, you can use alternatives like "portable document format" when you want to be more formal or explicit about the file type. When describing the actions performed on files you can use the expressions "convert to pdf", "save as pdf".
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
92%
Authority and reliability
4.5/5
Expert rating
Real-world application tested