# Browser API to Process & Manipulate PDF Files

Add PDF processing, manipulation, and conversion features to your front-end applications.

[Aspose.PDF for JavaScript via C++](https://products.aspose.com/pdf/javascript) allows you to work with PDF documents, pages, text, images, attachments, fonts, security, and signatures.

<p align="center">
  <a title="Download complete Aspose.PDF for JavaScript via C++ code" href="https://releases.aspose.com/pdf/javascriptcpp/new-releases/">
	<img src="https://raw.github.com/AsposeExamples/java-examples-dashboard/master/images/downloadZip-Button-Large.png" />
  </a>
</p>

## PDF Processing via JavaScript

- **Extract text** from PDF pages or search for a particular text segment using regular expressions.
- **Add or extract** images to & from PDF documents.
- **Concatenate** or **split** PDF files.
- **Linearization** of PDF documents for web optimization.
- **Convert** PDF documents to Office, web, and image formats with the highest visual fidelity.
- **Manipulate** PDF files to manage bookmarks, hyperlinks, watermarks, attachments & annotations.
- **Encrypt** or **decrypt** PDF documents and set document privileges or modify passwords.
- **Digitally sign PDF** documents or remove signatures. Also, verify if the PDF is signed and the signature is valid.

## Read & Write PDF & Other Formats

**Fixed Layout:** PDF, PDF/A, PDF/UA

## Save PDF Documents As

- **Microsoft Office:** DOC, DOCX, XLS, XLSX, PPTX
- **Images:** JPEG, PNG, BMP, TIFF, EMF
- **Others:** EPUB, DICOM, SVG, SVG(ZIP), GRAYSCALE PDF, PDF/A, TEX, TXT

## Platform Independence

Aspose.PDF for JavaScript via C++ is a WebAssembly-based library that can be used to create applications in any browser that supports this technology.
The library was written in C++ and does not require additional runtime environments.

## Getting Started with Aspose.PDF for JavaScript via C++

Are you ready to give Aspose.PDF for JavaScript via C++ a try?

- Execute `npm install git+https://github.com/aspose-pdf/Aspose.PDF-for-JavaScript-via-CPP` in Terminal in Visual Studio Code or in another console.
- You can also add one line in `dependency` section of `package.json` manually

```json
"dependencies": {
    "some-package": "link",
    "aspose-pdf-js": "github:aspose-pdf/Aspose.PDF-for-JavaScript-via-CPP",
    "another-package": "link"
  }
```

## Setting up

- Rename `setting.json.default` into `settings.json`
- Add desired values into `settings.json`
- Put `arial.ttf` and `times.ttf` into `fonts` folder

You need to use `encrypt_lic.html` to get an encrypted license file for running in full-featured mode.

## Extract Text From Whole PDF

```js
// Add this function as handler for file-upload element
var ffileExtract = function (e) {
      const file_reader = new FileReader();
      file_reader.onload = (event) => {
        /*Extract text from a PDF-file*/
        const json = AsposePdfExtractText(event.target.result, e.target.files[0].name);
        if (json.errorCode == 0) document.getElementById('output').textContent = json.extractText;
        else document.getElementById('output').textContent = json.errorText;
      };
      file_reader.readAsArrayBuffer(e.target.files[0]);
    };
```

## Save PDF as Office Formats

One of the most popular features of Aspose.PDF for JavaScript via C++ is to convert PDF documents to other formats without needing to understand the underlying structure of the resultant format.

Give the following snippet a try with your samples:

```js
// Add this function as handler for file-upload element
var ffileToDocX = function (e) {
    const file_reader = new FileReader();
    file_reader.onload = (event) => {
      /*convert a PDF-file to DocX and save the "ResultPDFtoDocX.docx"*/
      const json = AsposePdfToDocX(event.target.result, e.target.files[0].name, "ResultPDFtoDocX.docx");
      if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
      else document.getElementById('output').textContent = json.errorText;
      /*make a link to download the result file*/
      DownloadFile(json.fileNameResult, 
      "application/vnd.openxmlformats-officedocument.wordprocessingml.document");
    }
    file_reader.readAsArrayBuffer(e.target.files[0]);
  }
```

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