Anyone who has used a computer knows that PDF gives the biggest impression that it is a file that can not be modified. But not many people want to know what PDF really means. Now let's see what PDF is really like?

pdf (abbreviation of portable document format, meaning "portable document format") is Adobe Systems for the development of document exchange of a file format, with the application, operating system and hardware-independent.pdf to word converter offline software free download full version PDF documents based on the PostScript language Image model, in any printer can ensure accurate color and accurate printing results, that is, PDF will faithfully reproduce the original of each character, color and image.

PDF four major features

1. Universal

Different systems (Windows, Mac, Unix, Android) for a document format have to improve their own requirements, such as in the Windows system you can not view the MAC page format files. PDF this technical document format and the operation of the management system platform does not have any relationship, that is to say, in the Internet or any electronic document viewing equipment PDF format can be viewed, without the influence of the system platform.word to pdf converter online i love pdf So a lot of similar books, product information, etc. will be used to disseminate PDF format.

2. high-end consistent format standards

We often encounter such a situation, you use different versions of software to do a document, often open the text, formatting paragraphs will appear or a small problem, PDF file format can encapsulate the text, fonts, formatting, color, and equipment has nothing to do with graphics and images in a file, any different systems or different versions of software to open the format to ensure that it is consistent.jpg to pdf converter and combine

3. Perfect Viewing Experience

We often collect eBooks online. As you can see, most of them are in PDF format. There are two main reasons for this. The first reason is the second point above, the second reason is that the e-book produced by PDF has the texture and reading effect of the paper book, which can vividly show the original appearance of the original book, the display size can be adjusted at will, providing readers with a personalized way of reading.

4. non-editable

Usually our contracts or important notification documents, most of the dissemination of PDF format, because for such documents, we generally require a higher, not only to ensure that the format is uniform, and can not easily change any content.

In fact, the original intent of the PDF design is not to edit the content of the PDF in the form of pictures can not be modified is understandable, but sometimes the text in the PDF in the form of non-photographic form can not be modified. Many people will use third-party software OCR to recognize the text. If the resolution of the text in the document is high enough, it can be directly converted into editable text, but if you use the software directly to convert the format, there will often be coding or document formatting errors.