How to convert golang pdf to txt

Today, I want to share with you how to convert PDF files to text files, specifically using the PDF to TXT library in Golang. PDF is a very common format in modern literature, but in some cases, for text processing and analysis, it may be inconvenient to use documents in PDF format. Therefore, we need to convert it to text format for further use. While there are plenty of software that can do this, it's more efficient and flexible to use a library to convert PDF to text in a programming environment.

First, we need to download the Golang PDF to TXT library. There are many PDF to TXT libraries available, but we use one of the few most popular ones - go-pdf-to-text. This library is a good choice because it is easy to use and has good documentation.

Installing the go-pdf-to-text library is easy, just run the following command in the command line:

go get -u github.com/lu4p/unipdf/extract
go get -u github.com/lu4p/unipdf/model/textencoding
go get -u github.com/lu4p/unipdf/model/textlayout
go get -u github.com/lu4p/unipdf/model/textencoding/simplenc

After downloading these libraries, we can write the code and convert it to text . Here is some sample code to convert a PDF file to text format:

package main

import (
    "fmt"
    "os"

    pdf "github.com/lu4p/unipdf/v3/model"
    "github.com/lu4p/unipdf/v3/extractor"
)

func main() {
    f, err := os.Open("example.pdf")
    if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }
    defer f.Close()

    pdfReader, err := pdf.NewPdfReader(f)
    if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }

    numPages, err := pdfReader.GetNumPages()
    if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }

    ex := extractor.New(pdfReader)

    for i := 1; i <= numPages; i++ {
        pageText, err := ex.ExtractPageText(i)
        if err != nil {
            fmt.Println(err)
            os.Exit(1)
        }
        fmt.Println(pageText)
    }
}

In this example, we first open the PDF file and then load it into pdfReader. We then use the New function from the extract package to create an extractor that loads the page content into memory for text extraction. Using a loop, we loop through all pages and convert them to text.

We can see that using this library is not difficult at all. Go ahead and try this library for PDF conversion.

In addition to the go-pdf-to-text library, there are some other libraries that can be used to convert PDF to TXT. However, each library has different advantages and limitations in some aspects. For example, some of these libraries may convert faster, while others may provide more accurate text extraction. Therefore, you need to make trade-offs when choosing a library based on your project needs and the accuracy of your desired text output.

In short, PDF to TXT can be a very useful tool, especially when the content in the PDF needs to be analyzed and processed. Using Golang, you can easily convert PDF files to TXT format and extract the required text data from it. The go-pdf-to-text library we used works great, but you can use other libraries for this task, depending on your project needs and desired output.

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