Javatpoint Logo
Javatpoint Logo

PDF Definition

PDF Definition

PDF - Portable Document Format

Portable Document Format is a file format created by Adobe.

Since it is simple to use, it is used world-wide, and is easily printable. It is a format frequently used for documentation and storage. In addition to being password-protected and safe, PDF files are also encrypted.

Almost any document, even those created in Microsoft Office, can be converted into PDFs. Including video, music, graphics, and text makes PDF documents a convenient and adaptable format for many compositions.


A portable Document Format is used to share and save documents in a format accessible from any computer or device.

Digital signatures, document exchange, and editing are frequently done with PDF files. Adobe Systems created this kind of File, initially available in 1993.

Documents can be seen on any device in PDF form, which keeps all page formatting and layouts. A digital signature is required to make changes to a PDF file.

Photos, videos, text, and interactive elements like buttons, text fields, pop-up windows, and more can all be found in PDF files.

They are frequently employed for business communication, including contracts, promotional materials, and legal papers.


John Warnock, the co-founder of Adobe, initiated the paper-to-digital upheaval in 1991 with an idea he called The Camelot Project. The intention was for anyone to be capable of saving documents of any proposal, sending electronic copies of these files anywhere, and displaying and publishing them on any device.

Camelot had evolved into PDF by 1992. Today, this is the file system that businesses worldwide rely on.

In contrast to other file types, PDF documents allow users to watch embedded movies, click on links, and annotate or make notes. Moreover, it can be encrypted and digitally signed.

This is done by encoding the fonts, pictures, and other information required to represent documents accurately in a file format. A PDF file is a specific kind of File that can be viewed on any computer equipped with a PDF reader.

User manuals, eBooks, application forms, and scanned papers are among the many documents frequently saved as PDF files since they can be shared across numerous platforms.

If you find a file with the extension.pdf, it is a PDF file.

Why Should You Use PDF Files?

Generate a newsletter in Word Document and distribute it as an a.docx folder, the standard Word document file. Everyone can access and display the newsletter with Word documents installed on their computers.

Because Word files are intended to be modified, some of the layout and text in one's File may be moved around.

PDF files, however, are intended for viewing rather than editing. One reason PDFs are so common is that they can retain document formatting, making them easier to share and allowing them to look identically on any device.

Sharing the newsletter like a PDF file might help ensure everyone can access it.

Are There Any Security Concerns with Pdfs?

Because PDFs can cause contamination, recipients must ensure that the origin of any Pdf documents they install is trustworthy.

Furthermore, PDFs can be password-protected, requiring a password from anyone attempting to open the File.

The following are some scenarios in which Documents are desirable:

  • When users want to send a document electronically but want to ensure that the receiver sees it accurately as the sender intended.
  • When users want to keep a document's original formatting, I f they create a cv in a word processing program and secure it as a PDF.
  • The receiver will see the same font style and layout as the sender.
  • When a user wishes to create a file that is not easily editable, for instance, if those who wanted to send a contract to someone didn't want them to modify it, the originator can save the document as a PDF.

Different Types of PDF Editors

A Tool is far more feature-rich software than a PDF viewing or reading application. Today's editing models enable different functions within one software suite, allowing users to manipulate and alter the material of a PDF. Other terms you may come across fall under the general category of PDF editing. These are some of the terms:

PDF editor- It allows you to encrypt documents, add required fields, change and adjust text, edit images, and do various other things.

PDF creator - applications that let users create additional documents from idea to implementation or to digitize scanned documents.

PDF decoder - a program that allows you to convert PDF files into and out of different file types like Excel, Term, and even jpeg images.

Fundamental PDF Functions

We will begin with a few basic functions related to working with Pdf documents.

This will also let us examine some fundamental concepts associated with interacting with Pdf Files and Books.

  • Opening a document
  • Putting a file away
  • Using a password to open a PDF file
  • Annotations can be added and edited.

How to View a PDF Document?

When opening a PDF, most people go straight to Adobe Acrobat Reader. Adobe formed the PDF standard, and its program is unquestionably the most widely used free PDF reader.

It's completely alright to use, but we think it's a bit bloated with features you may never require or wish to use.

PDFs can be opened in most web browsers, including Chrome and Firefox. You could require an add-on or outgrowth to accomplish this, but having one open immediately when users click a PDF web link is very convenient.

Another option is to use a dedicated web-based opener, like the one found at

If you want something with more features, we advise Slim PDF Reader or MuPDF; all three are free. More options can be found on our top free PDF readers list.

How To Get Pdfs on Android?

Follow these simple instructions to download PDFs immediately to one Android using a phone PDF reader:

  • Open the PDF file users want to save.
  • On your Android, tap File, then Print.
  • Select Save as PDF from the dropdown menu.
  • Choose a location for one PDF and click Save.

What Are the Advantages of Using PDF?

PDFs are effective for downloading and printing documents such as curriculum vitae, agreements, and online applications. PDF files are useful for magazine articles, product brochures, and flyers where the creator wants to keep the original graphic visual effect online.

Advantages of PDF

PDF is characterized by a number of features, including:

  • Portability across multiple platforms

Adobe created free software to view PDF files on various platforms, including Microsoft Windows, Macintosh, Linux, and handheld personal assistants. The Adobe Reader program ensures that a File can be viewed on almost any computer with identical visual fidelity. Because of its cross-platform portability, PDF has become a popular method of knowledge dissemination. Furthermore, virtually all mobile device operating systems support PDF files, which has contributed to the wide - spread adoption of the format for PDF files.

  • Convenience

As it works with all computer systems and is simple to view and distribute, the File format is practical. You do not need to be concerned that your File will not appear on a specific device or os version if it is a PDF file.

The ability to view PDF files is integrated into many devices and operating systems. Tools are available to assist you in taking advantage of all the advantages PDF documents offer.

  • Portable storage

Even though PDFs can theoretically hold an infinite amount of data, they can be shrunk into a size that can be exchanged while still retaining full ownership of the caliber of any pictures they contain.

  • Consistent file format

Have you ever utilized a file type that becomes corrupt when opened by a certain gadget or operating system?

PDFs can be widely circulated without the format changing, unlike other files that become jumbled when accessed on a gadget or version that has a different name as the source. There are numerous benefits to using PDFs, to put it briefly.

Although the majority of people always utilize the "standard" PDF format, there are other PDF formats as well.

  • Verify the accuracy and reliability of the graphics

No matter what device, operating system, or software is used to view it, a PDF always shows the same text and layout. Once a document has been created in PDF, you can be sure that it will be displayed to the reader with the intended visual look, including the layout, fonts, colors, and images.

This holds true regardless of whether the result is printed or shown on the display of your PC, smartphone, or another device. Each PDF file page will have a layout and appearance that the user desires to convey because a PDF file is essentially divided into sheets of output.

This is among the factors contributing to the widespread usage of PDF for electronic publishing distribution.

  • Possibility of document security

To secure the information and the overall document, the PDF allows for setting up various levels of Access, such as overlays, passwords, or user authentication.


Notwithstanding the benefits listed above, PDF has the unfortunate consequence:

  • Arduous to control

Depending on the type of PDF, we can edit it in different ways. Various PDF files types, such as Scanned PDFs and Searchable PDFs, require distinct approaches to working with them, such as when looking for or gathering information.

  • Arduous to edit

The PDF was designed to be a document exchange format. No matter what computer application or platform a document viewed, the initial goal was to preserve and safeguard its information and appearance.

Because of this, editing PDFs is complex, and information extraction from them may be difficult.

  • Security problems and vulnerabilities

Sadly, modern PDF readers have numerous security flaws. The most hazardous is the ability of an attacker to offensive manner software on a target system using code execution flaws. See the graphs displaying the Acrobat Reader DC flaws for more information.

Let's quickly outline the most general categories of vulnerabilities:

There are two ways that a denial of service assault can happen:

  • A PDF document's inherent self-referencing entities and elements form an unending loop. The PDF reader can crash as a result of increased CPU use.
  • The system could freeze if a deflated bomb, exponentially boosting the size of a PDF in memory as it decompresses its inner streams before processing.
  • Via a corrupt PDF document, remote attackers can use the executed code vulnerability to exploit code on our system.

A specially crafted PDF file that causes memory corruption can be used by remote attackers to crash an application and create a denial of service.

In conclusion, PDFs are unquestionably more popular than they've ever been, so this appeal isn't going anywhere.

Large companies, the corporate sector, and governments depend highly on PDFs to safely share, manage, and keep their electronic data.

Many Python libraries exist for processing PDFs.

Python libraries and packs are a collection of useful features and functions which help us write less code every day and are essential to making programming easier.

Although many Python libraries deal with PDF encoding, we will go over the most practical and helpful ones because they will serve as the basis for the utilities we hope to build throughout this course.

We will examine these Python libraries and throw light on their data, which were gathered from publicly accessible projects on Github.

The following metrics will be considered in these statistics:

  • Star ratings: Ratings show how well-liked a project is.
  • Forks: To introduce improvements, they offer the number of duplicates of the project repository.
  • Releases: They sometimes indicate the level of involvement with the chosen project.

6 PDF file types based on ISO

The following are the six primary categories of PDFs, as listed by ISO, the International Standards Organization:

  • The common PDF format is utilized in offices and for online file sharing and viewing.
  • This format, known as PDF/A, is excellent for long-term file storage. Those that need to save files for a long time, including records managers and archivists, use it.
  • Large-sized drawings, multimedia, and other capabilities of the PDF/E format address engineering needs. This PDF standard is used by architects, building specialists, and persons working in the manufacturing industry.
  • This format, PDF/X, has capabilities that enhance font embedding, color profiles, pictures, etc. It is, therefore, perfect for print specialists and graphic designers.
  • Work similar to the PDF/X format is PDF/VT. With better capabilities, such as more customization options, it is different. It is appropriate for graphic designers and print industry specialists.
  • PDF/UA - Universal Access is referred to as the UA here. It includes navigation and reading assistance technology.

What Can PDF Documents Be Used For?

The following are the seven crucial PDF handling features:

  • A vital security feature called File locking limits PDF accessibility and prevents unauthorized users from relocating, modifying, or destroying a file. For instance, closing documents using a password is a typical practice. For additional information, see our reference to locked PDFs.
  • Addition of Text and PDF Forms: When choosing a tool, make sure you can add Text and PDF Forms. A PDF should allow you to add text to a document as you see fit and establish a table of contents regarding shapes.
  • Drag & drop capabilities: These capabilities let you move files from one folder to another, which speeds up and simplifies editing.
  • Including Visual Symbols and Signatures: A key feature that every PDF management application must have is the capacity to add visual symbols and signatures. Check out how to type characters and accents, for instance.
  • Online Access: It's crucial to have access to papers on the internet. Users can now modify files from anywhere. Your document control lifecycle must include collaboration.
  • Watermarking Documents: A digital watermark gives them a hallmark of authenticity. Knowing the origins of files is helpful for users.

How To Create PDF Files from Digital Files?

You can produce or convert PDFs using the functionality in a few of the abovementioned features. Things can be converted into photos, eBooks, MS Word docs, and other data types into PDF files with a PDF creator.

This differs based on the particular type of data that you're using. Nonetheless, the procedures will largely be comparable, if not identical.


PDFs are useful for both people and companies because of these factors. PDFs are flexible and adaptable file formats that can hold a wide range of data. PDFs' features, such as passcode security, digital signatures, and others, allow them to be used for secure corporate communication and archiving.

Youtube For Videos Join Our Youtube Channel: Join Now


Help Others, Please Share

facebook twitter pinterest

Learn Latest Tutorials


Trending Technologies

B.Tech / MCA