Online pdf editor free how did it come about ? Many practitioners have used PDF files, and some people are confused about some of the characteristics of PDF, why is there a PDF? This article will introduce you to the development history of PDF and let you know more about the origin of PDF files and Online pdf editor products.
About PDF
Preliminary Study
I believe that most of you have come into contact with the highly respected format PDF, and when you want to edit a PDF file, you have to give Adobe that money. So, our topic comes, why does PDF exist? It is cumbersome to edit, and the conversion to and from other formats is not smooth. However, it also looks no different from a file like Word. What’s up with Print to PDF? To answer these questions, we’d better first figure out what a PDF is.
The following is a functional definition of this format:
| Portable |
| Document |
| Fomat |
Although we know what functions PDF can achieve, we still know nothing about its internal structure, so we need to use some tools to further analyze it.
discover mysteries
MuPDF is an open source PDF reader component, based on which is a lightweight reader SumatraPDF for Windows.
Along with MuPDF also released a tool software MuTool for parsing and processing PDF.
This tool needs to be called from the command line, as follows:
After that, I opened the PDF with TXT text again. Although it was converted into text, these things were still incomprehensible.
After that, we take a small section of the PDF and make a little change, as follows:
This is exactly the same as JSON data common in programming.
The final conclusion is that the so-called PDF file is actually a data package composed of common data forms such as numerical values, True/false, strings, arrays, and hash tables.
The above series of data is called “Object” in PDF terminology. Well, at this point you may be asking, “Why are PDFs all gibberish and not plain text data like JSON?” This is because PDFs also have an exclusive “Stream” object format.
This object format can store arbitrary binary data, usually non-text content such as fonts, images, etc. embedded in PDFs. In other words, PDF is actually a file format organized by a mixture of textual and non-textual data. Some people may still have doubts, such as “why can PDF be viewed as plain text?” The explanation for this is that MuTool helps us to transliterate the binary data and encapsulate it into PDF stream data in text form.
How did Online pdf editor free come about?
Background of the founding of PDF format
The PDF format was created by Adobe in 1993 out of a need for file portability at the time. Portability here doesn’t mean the portability of just storing files on a floppy disk and taking them anywhere freely. It was created with the idea that a PDF file would look the same no matter what computer it was opened on.
In the days when PDFs became popular, the problem of documents not loading correctly and stably was much more serious than it is now. Part of the reason was that there were so many word processing and desktop publishing applications at the time. The consistency of PDF is its biggest selling point in the mass market.
And the IRS released electronic tax returns in PDF format in the mid-1990s so that all taxpayers could read and print the forms correctly. Even today, if you need to print a hard copy of an electronic document and you need to print exactly as it appears in the item, PDF is still the best option. So there is the Print to PDF function mentioned earlier.
unexpected solution
LibreOffice Draw, which is part of the LibreOffice Draw suite of open-source office software, but many people will choose to pay $13 to $15 a month to use the official Adobe-provided software. Although sometimes the experience is not good, it works fine in most cases. This also makes the PDF fee not cheap, but still popular when important historical and legal documents are digitized. After all, people don’t want to sign an electronic contract because the file format used can’t load perfectly every time. The respective documents looked different, which eventually led to disputes. That’s why student loans now only use PDFs.
Today, many PDF editors and file conversion tools have emerged, and some tools even claim to solve users’ PDF problems for free. Among them, I have to mention the Online pdf editor launched by the Abcd platform . It is an epoch-making product that truly solves most PDF processing problems. Compared with most tools, its advantages are high efficiency, convenience and aggregation. Comprehensive functions, high security, no content and so on. This is a completely non-profit product that does not require any payment and does not occupy memory. The founder of the platform is committed to promoting the new standard of global paperless office and modern online office.
Summarize
Online pdf editor free how did it come about ? This article shares the data structure and background of the PDF format for you, and finally talks about the fact that cash can replace Adobe’s Online pdf editor , if you are still paying a regular amount to solve PDF-related problems Cost, why not use a better AbcdPDF online office tool, save effort and worry, why not do it?
