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)
  • 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

"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

// 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:

// 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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