Top 5 Free PDF Search Engine Sites to Read PDF Files

Emmanuel | Mar 16,2022 6 min read

Not everyone knows about using PDF search engine sites to source PDF files. However, conventional search engines like Google to find PDF materials can be strenuous and even involve checking the 20th page of search results. You waste time and might not even get enough relevant materials that suit what you are looking for.

The analogy is a simple one! PDF Search Engine sites are more specific and filter results to contain only PDF documents. There are a lot of these PDF search engines, and we will be considering the top 5 free PDF search engine sites.

5 Free PDF Search Engine Sites to Read PDF Files

1. Find-pdf-doc

2. PDF DRIVE

3. ResearchGate   

4. Google Scholar

5. Ebook3000

1. Find-pdf-doc

A PDF search engine site that reflects simplicity. You can use the Find-pdf-doc tool by visiting the website and entering the document name or keyword in the search box provided. Select the file format, and click search. The list is limitless, from PDF eBooks, instructional manuals, magazines, and educational notes.

Find pdf doc

What's more interesting is that Find-pdf-doc offers beyond sourcing PDF files. You can check for DOC, XLS, TXT, SWF, PPT, AI, HWP, RTF file formats. MP3, GAME, VIDEO, SOFTWARE, and DWF searches are also supported.

Pros

  • Indicate malicious sites/files
  • Easy to use
  • Supports multiple file formats

Cons

  • No preview options for search results

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2. PDF DRIVE

PDF DRIVE is another PDF search engine site to find and download thousands of PDF files to your device. It's fast and effective in finding PDFs that are not readily available on some other search engines. Besides, its design is user-friendly and can be navigated by anyone.

PDF DRIVE

It's recommended to researchers and those that want to learn more about specific subjects. Finding the PDF files is straightforward. Enter the search keywords and hit the Search button. You can search by page, publication year, and language.

Pros

  • Easy to navigate
  • Image preview options for search results
  • Fast search
  • Comprehensive; contains PDF files that might not be common on other sites

Cons

  • None

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3. ResearchGate

With several millions of pages on researched publications, the ResearchGate PDF search engine is another website to source for PDF files on any subject of your choice. It’s recommended for researchers and those in academics.

ResearchGate

Apart from the wide variety of subjects, the ResearchGate also serves as a networking avenue to meet other top researchers. You get to publish your work and collaborate with others to learn more.

Pros

  • Excellent for researchers and students
  • Useful for building an online community

Cons

  • Not recommended for finding PDFS outside the research/scientific field

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4. Google Scholar

Imagine accessing a library of well-researched and well-detailed PDF articles all in one place. That's what Google Scholar represents. The available PDF sources cut across various disciplines and are suggested for folks who love to do research work. Whether you are a student, teacher, or researcher in any field, this PDF search engine is what you need.

Google Scholar 

Not only do you get to view the PDF files, but Google Scholar also offers a download link for later reference purposes. Other details include the date the file was uploaded and the Author(s) names.

Pros

  • Recommended for those in the academics/research areas
  • Provides important details like the publication year, author names, etc.
  • Very useful for writing thesis and getting accurate citations

Cons

  • Elaborate but does not provide an image preview

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5. Ebook3000

This is an online library of free ebooks and documents in PDF formats. The files are arranged into about 17 different categories. That shows how stacked the eBook3000 PDF search engine database is. Users can search for their favorite books through the title keywords or the ISBN. Lovers of eBooks and magazines would particularly find this website very useful.

EBook3000 EBook3000 Select an Image

Pros

  • Offers the option to search for PDFs through their ISBN
  • Provides image preview for some search results

Cons

  • Search engine crashes sometimes
  • Contains links to restricted content

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You can also use Google!

Yes, Google can also be utilized as a PDF search engine site. It all depends on how you input your search keywords. Remember that Google contains everything you need, including non-PDF sources. Hence, users must add a ".pdf" to the search query before selecting Search.

Adding the ".pdf" extension commands Google to filter out the search results that do not contain PDF files. Only the ones with PDF sources come up in the displayed results.

Conclusion

We have compiled the top 5 free PDF search engine sites we believe will work for you. These PDF tools provide the ease of sourcing PDF files and materials. They offer access to many PDF books, manuals, and documents that fit what you seek.

The PDF DRIVE is our top choice for general PDF file search. The interface is cool, and the website contains lots of PDF sources across different fields. However, ResearchGate or Google Scholar is what we recommend for academic-related stuff.

Do you think there are some very good choices we omitted? Feel free to mention them in the comment section. You can also ask questions concerning any search engine sites we discussed in this article.

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