5 Recommended PDF Search Engines

Part 1: 5 Recommended PDF Search Engines

1. PDF Search Engine

PDF Search Engine is the popular PDF search engine that supports users to search PDF files and PDF books. On this website, you can search CHM/Word/RTF/TXT files. Over 500 million PDF books and files are offered for free.

2. FindPDF

FindPDF is the PDF search engine that supports users to search, save, read and share PDF files. 250 million PDF files, tutorials and books are offered in the website.

3. FreeFullPDF

FreeFullPDF, one of the excellent PDF search engines, provides over 80 million scientific documents. Bioscience, program design, health science, math and various science-themed books and documents can be searched and read in the website. Besides, the engine supports users to get more contents through Google search.

4. Ebook3000

Ebook3000 is the PDF search engine specializing in PDF e-books. You can search the book name and the publication number to find out the target e-book. Besides, it offers the item to help you get access to the recently added books. Over 34 kinds of books are downloadable.

5. Open PDF

On the website Openpdf, you can find out and download many PDF documents and e-books. It is noted that the top 3 search results are the ad links where you can buy books.

These are the recommended PDF search engines. If you want to modify, encrypt and add watermark on PDF files, you can use Renee PDF Aide. The followings are more details.

Part 2: How to Edit PDF with Renee PDF Aide?

1. What is Renee PDF Aide?

Renee PDF Aide is the software that supports to edit PDF and convert PDF. With utilization of the advanced OCR (Optical Character Recognition) technology, it can convert PDF to Word/Excel/PowerPoint/Image/HTML/TXT and the other common formats. You can designate the specific pages to be converted at the speed of 80 pages/min. Besides, it can repair the damaged PDF files, compress PDF files to shorten the loading time, merge several files into one and rotate the file position. En/decryption and watermark are allowed to add for PDF files, too.

What’s more, Renee PDF Aide supports English/French/German/Spanish/Portuguese/Chinese/Korean/Japanese. Under the mode of OCR, it can greatly improve the accuracy of character recognition. Even though you are a new user, you can use this software easily.

2. How to Use Renee PDF Aide?

There are two functions of Renee PDF Aide. You can not only basically edit PDF, but also convert PDF to the other formats. Let’s see how to edit PDF files with Renee PDF Aide.

Steps:

Step 1: Download and install Renee PDF Aide. Then, open the software and get into [PDF Tools].

Step 2: At the top menu, select the functions. Then, click on [Add Files] to select the target PDF file.

Instruction of each tool:

Repair: Fix the broken PDF file or the file that cannot be opened

Optimize: Compress large PDF file

Split: Split a PDF file into small files

Merge: Merge several PDF files into one, or merge the selected pages

Rotate: Adjust a PDF file at different angles

En/Decrypt: Lock and unlock PDF files

Watermark: Add overlay watermark or background to PDF files

Image→PDF: Convert one or more images into PDF file(s)

Step 3: Finally, click on [Convert] to save the edited PDF file.

In addition, you can get into [Convert PDF] to convert PDF to the other formats.