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++ allows you to work with PDF documents, pages, text, images, attachments, fonts, security, and signatures.

PDF Processing

- Extract text from PDF pages, including search via regular expressions and hidden text detection.
- Add or extract images to and from PDF documents; remove or replace images when needed.
- Concatenate, split, or reorganize PDF files; delete specific or blank pages.
- Linearize PDF documents for web optimization and optimize internal structure and resources.
- Crop PDF-pages.
- Convert PDF documents to:
- Office formats: DOC, DOCX, XLS, XLSX, PPTX, DOCX with Enhanced Recognition Mode
- Web formats: SVG, SVG (ZIP), XPS, EPUB
- Image formats: JPEG, PNG, BMP, TIFF, DICOM
- Other formats: Grayscale PDF, PDF/A, TeX, TXT, Markdown
- Manipulate PDF structure and content:
- Bookmarks, hyperlinks, annotations, attachments, JavaScript
- Fonts, metadata, layers, background color, tables
- Secure PDF documents:
- Encrypt, decrypt, set or change passwords
- Configure access permissions
- Digitally sign PDFs using PKCS#7, validate and remove signatures.
- Add or remove watermarks, stamps, page numbers, headers/footers, background images.
- Flatten PDF documents (forms, annotations, layers).
- Create booklets or generate N-Up layouts.
- Export form data (AcroForm) to FDF, XFDF, XML.
- Validate and convert to/from PDF/A format.

Read & Write PDF & Other Formats

Fixed Layout Support:
- PDF, PDF/A

Save/Export As:
- Office: DOC, DOCX, DOCX(Enhanced Recognition Mode), XLS, XLSX, PPTX
- Images: JPEG, PNG, BMP, TIFF, DICOM
- Other: EPUB, SVG, SVG (ZIP), TeX, TXT, Grayscale PDF, PDF/A, XPS

Input Formats:
- TXT, Images (JPEG/PNG/BMP/TIFF)

Advanced Features

- Fonts: List, embed/unembed, and replace fonts in PDF files.
- Metadata: Set, extract, or remove metadata.
- Layers: Get list of layers, merge or flatten them.
- Forms & Annotations:
- Delete annotations, bookmarks, JavaScript, tables
- Flatten forms
- Attachments: Add, extract, or delete file attachments.
- Text Tools:
- Find, replace, or delete text (including hidden text)
- Replace multiple text fragments with alignment control
- Get word and character counts

Additional Utilities

- Repair corrupted or damaged PDF files.
- Generate PDF from TXT or image files.
- Optimize document resources and structure.
- Product diagnostics: retrieve library info, version, and capabilities.

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]);

  }