PDF vs. HTML Format: Differences and When to Use Each

The primary difference between PDF and HTML is that the former is used for static documents that need to remain consistent across all platforms, while the latter is preferred for dynamic webpages that adjust to different display types.

In this article, we will explore what each of these formats is used for, what their advantages are, and how exactly they differ.

Key Takeaways

• PDF is a file format used to preserve the layout of a specific document, while HTML is a markup language used to create and structure content on webpages.
• The main differences between the two lie in the design and layout control, accessibility, editing, sharing, offline access, file size, and performance.
• PDF is typically used for printing, archiving, private documents that need protection, or preserving particular formatting when sharing.
• HTML, on the other hand, is used for SEO, accessible content, and universally compatible webpages.

What Is a PDF?

A PDF, which stands for Portable Document Format, is a file format used to preserve the design and layout of the document, no matter what device you open it on. In other words, it is primarily made to be shareable, printable, and universal.

Furthermore, PDFs are excellent when you want to secure your file and limit editing. Not only do they come with security features such as encryption, digital signatures, and password protection, but they are also generally more difficult to edit than other file formats.

When to Use PDF Format

To help you understand PDF format better, we’ll take a look at some common use cases:

• Legal documents and contracts. Tax forms, agreements, and official applications are frequently used in PDF, precisely because of its advanced security features. E-signatures and digital signatures are easy to apply in a PDF, and they are legally valid in many situations, depending on applicable laws and requirements.
• Employment. Resumes and cover letters are also usually submitted in a PDF format, as it guarantees they can be opened on different devices and retain the same layout. Additionally, a PDF resume looks far more professional than a Word document.
• Publishing. When comparing PDF vs. HTML for ebooks, PDF remains the standard for downloadable publications and the best one to use for printing. On the other hand, HTML-based ebook formats (like EPUB) are better suited for reflowable text that adapts to different screen sizes and reader preferences.

What Is HTML?

HTML, on the other hand, stands for Hypertext Markup Language, and it’s a markup language used to create and structure content on webpages. Just like PDF, it ensures that the content is viewable on any device and screen, but it does so through adapting, not locking features.

In other words, HTML reformats and resizes content depending on the screen and device you’re using. That’s why web pages look different on desktops, tablets, and smartphones; HTML adjusts to each of these devices to ensure the best viewability and compatibility.

When to Use HTML Format

Given the abovementioned, here’s what HTML is typically used for:

• Blog posts and articles. Practically any blog you see on the internet was created using HTML, which adapts to different devices and allows easy editing. Furthermore, HTML is excellent for SEO due to its indexability, so bloggers use it to increase their visibility on Google.
• Interactive forms and surveys. Interactive content is typically created with HTML, as this markup language facilitates embedding features like links, animations, forms, and more.
• E-commerce product pages. Interactivity and indexability are very important in e-commerce, as businesses want their products to be visible and the pages to have buttons, images, and other clickable elements. As a result, most use HTML to create their web pages.

PDF vs. HTML Differences Explained

Key differences between PDF and HTML are layout and design control, accessibility, editing and flexibility, sharing and distribution, offline access, and file size and performance.

Here’s a quick breakdown of how PDF and HTML formats compare:

Now let’s explore these PDF vs. HTML differences in more detail.

#1. Layout and Design Control

One of the biggest differences between PDF and HTML is the level of control you have over layout and design.

In both cases, you can initially arrange all elements the way you want to, but once you export your document as a PDF, the formatting is essentially locked. That means it will look exactly the same on all devices and platforms, like a digital piece of paper.

On the other hand, HTML is highly adaptable, and the formatting changes depending on the device you’re using. This is actually an advantage; you don’t have to zoom in on your smartphone, as is often the case with PDFs. Instead, the web page will adjust to the device you’re using naturally.

In a nutshell, when comparing a PDF and a web page format, the former gives you greater control over the document itself, while the latter allows you to control the content’s behavior across multiple devices.

#2. Accessibility

If we compare PDFs and HTML in terms of accessibility, HTML practically always wins. It is built for creating webpages, which most screen readers and assistive technologies interpret automatically.

Some of the HTML accessibility features are:

• Built-in semantic markup
• Adjustable text sizes
• Keyboard navigation
• High-contrast modes
• Compatibility with smaller screens
• Zoom options

On the other hand, PDFs aren’t automatically accessible; the creator has to manually add the appropriate features to comply with Web Content Accessibility Guidelines (WCAG 2.2). An accessible PDF includes proper tagging, headings, alt text for images, language specifications, and more.

Without this, screen readers can’t properly interpret the document and may end up reading the content out of order, ignoring headings, and struggling with complicated layouts.

#3. Editing and Flexibility

HTML wins when it comes to editing and flexibility, too; it’s designed for easy adjustments and updates, so that you can add and change content whenever you want. This isn’t the case with PDFs, which can be edited, but the process is nowhere near as intuitive. In other words, if you want to edit a PDF, you either need the source file (usually in an editable format, like Word or InDesign) or use a PDF editor.

Another advantage HTML has over PDFs in terms of editing is the simplicity of collaboration. Anyone with access to your content management system can make adjustments and apply them within seconds. This isn’t the case with PDF documents, which typically require emailing back and forth.

#4. Sharing and Distribution

When it comes to sharing documents, HTML and PDF are equally effective, though used for different types of content. HTML is typically used for public, dynamic content that might require frequent updates, while the PDF format is preferred for specific documents, especially when their layout must remain the same.

So, for instance, you’ll use PDF to distribute contracts, invoices, forms, reports, manuals, resumes, and research papers. Sometimes, these documents are uploaded online for a wider audience, but they’re more frequently exchanged in email attachments on a smaller scale.

On the other hand, web pages created with HTML are usually intended for public consumption and shared via URLs. Typically, they are used for blogs, product pages, articles, newsletters, and other content that may need to be frequently updated.

Overall, when deciding between HTML vs. PDF for documents, the key question is whether the content needs to remain fixed (contracts, forms, reports) or update frequently (web-based documentation, knowledge bases).

#5. Offline vs. Online Use

The difference between a PDF and HTML is clearest when we look at offline and online use. As a coding language built for websites, HTML doesn’t typically work without internet access, unless offline support has been intentionally built in. On the other hand, once downloaded, PDFs are completely accessible offline.

Even when webpages do have offline support, they’re unable to display live information or pull content from the servers. As a result, you won’t have access to all features, and some of the data may be missing.

However, this is not an issue in the case of PDFs; the document is entirely self-contained and looks exactly the same with and without an internet connection.

#6. File Size and Performance

HTML is typically more lightweight than a PDF document, as it loads text and images separately. This is also why its loading times are much faster, even when the webpage in question is full of complex and interactive elements.

On the other hand, PDF documents with many images and graphics can be quite large. That doesn’t typically affect loading times; when you click on a locally saved PDF, it’s likely to open in a few seconds. However, it might impact PDFs hosted online that open in browsers; they may take longer to load.

Of course, you can control PDF file size to some extent; for example, use settings to optimize it when saving, or online compressors to reduce it. This is especially useful when you want to share your document via email.

Advantages of PDF Over HTML

Advantages of a PDF over HTML include the following:

• Fixed layout. Essentially, what you see in your PDF document is what everyone you share it with will get. There are no unpleasant surprises, like incorrect page breaks, inconsistent fonts, or unpredictable margins. Even if the people who receive your file use different devices, PDF readers, and operating systems, the document will appear exactly the same.
• Excellent for printing. Printing an HTML webpage can lead to unpredictable results, which is why most people avoid doing this. That’s not the case with PDFs, though; this format is ideal for printing, as the layout is locked in, and you have absolute control over the design.
• Security features. PDF format supports various security features, like password protection, encryption, digital signatures, and more. As a result, it’s excellent for sensitive legal, financial, and administrative documents that should be viewed and accessed by a limited number of people.
• Ideal for archiving. PDF can also be converted to PDF/A, a format designed for long-term preservation and archiving. Even if technology changes, this format remains readable and consistent, so your data doesn’t get lost even after many years of storage.

Advantages of HTML Over PDF

Advantages of HTML over PDF are the following:

• Universal compatibility. Modern web browsers can read and support HTML, which means that your pages will display correctly across different devices. In fact, HTML is known to quickly adjust to all screen sizes, meaning that you don’t have to zoom in to read content or make any manual changes.
• Size and performance. HTML loads rapidly and is far more lightweight than PDF, even when your webpage contains numerous elements. This makes it very user-friendly; visitors to your website are unlikely to bounce due to long waiting times.
• Accessibility. As mentioned before, HTML is accessible by nature and highly compatible with screen readers and other assistive devices.
• SEO-friendliness. Google and other search engines are designed to understand HTML structure. As a result, a webpage built with HTML is generally more likely to rank well due to richer semantic structure, internal linking, and metadata options. PDFs can still be indexed and found in search results, but typically with less SEO flexibility.

Can You Convert PDF to HTML and Vice Versa?

You can convert a PDF to HTML by using Adobe Acrobat Pro to export your file as HTML, or you can rely on an online PDF editor for this. Either way, you’ll get the job done.

As for converting HTML to PDF, that is equally straightforward. Open your HTML file in a browser, then press CTRL + P, or Cmd+P on Mac, on your keyboard. This will take you to a Print screen, where you can select Save as PDF to convert HTML into a PDF.

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Final Thoughts

If you’re wondering whether you should use PDF or HTML, the answer is that it depends on the type of content you’re making. As you have seen, both are quite useful, but for entirely different things; PDF is more consistent, while HTML is more adaptable.

Ultimately, you need to weigh the pros and cons of each and decide which suits your needs better. Our rule of thumb is the following: reach for PDF when you value security and precision in the layout, and opt for HTML when you aim for higher outreach and easier editing.

PDF vs. HTML FAQs

#1. Is PDF or HTML better?

It’s difficult to say whether PDF or HTML is better because these two formats are used for completely different purposes. PDFs lock in the design and layout and are preferred for documents that need to stay exactly the same across all platforms. HTML, on the other hand, is more flexible and excellent for designing webpages that need to adjust to different screens.

#2. Why is HTML better for SEO than PDF?

HTML is better for SEO than PDF because it is designed for the web, so search engines can easily crawl and index it. As a result, pages made in HTML are more likely to rank higher and attract more traffic.

#3. Which format is better for mobile devices?

HTML is better for mobile devices, since it automatically adjusts to the smaller screen and displays information in a readable manner. On the other hand, a PDF stays the same across all devices, so it may appear small on your phone, requiring you to zoom in.