Aspose.PDF for JavaScript via C++ 25.6

Author: OleksandrAndriienko

AsposePDFforJS.js

@@ -10,26 +10,62 @@ Add PDF processing, manipulation, and conversion features to your front-end appl
   </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.
+## 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.
+- **Convert** PDF documents to:
+  - **Office formats:** DOC, DOCX, XLS, XLSX, PPTX
+  - **Web formats:** SVG, SVG (ZIP), XPS, EPUB
+  - **Image formats:** JPEG, PNG, BMP, TIFF, DICOM
+  - **Other formats:** Grayscale PDF, PDF/A, TeX, TXT
+- **Manipulate** PDF structure and content:
+  - Bookmarks, hyperlinks, annotations, attachments, JavaScript
+  - Fonts, metadata, layers, background color
+- **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:** PDF, PDF/A, PDF/UA
+**Fixed Layout Support:**
+- PDF, PDF/A
+
+**Save/Export As:**
+- **Office:** DOC, DOCX, 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
+  - Flatten forms
+- **Attachments:** Add, extract, or delete file attachments.
+- **Text Tools:**
+  - Find, replace, or delete text (including hidden text)
+  - Get word and character counts
 
-## Save PDF Documents As
+## Additional Utilities
 
-- **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
+- **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
 

AsposePDFforJS.wasm.zip

@@ -292,6 +292,10 @@ <h2>Aspose.PDF for JavaScript via C++</h2>
         <label for="fileUnembedFonts">UNEMBED FONTS<span class="tooltip">Unembed fonts a PDF-file</span></label>
         <input type="file" id="fileUnembedFonts" accept="application/pdf" onchange="ffileUnembedFonts(event)">
       </div>
+      <div class="column">
+        <label for="fileOptimizeFileSize">SIZE OPTIMIZE<span class="tooltip">Optimize size of PDF-file with image compression quality</span></label>
+        <input type="file" id="fileOptimizeFileSize" accept="application/pdf" onchange="ffileOptimizeFileSize(event)">
+      </div>
     </div>
   </div>
 
@@ -1259,6 +1263,17 @@ <h2>Aspose.PDF for JavaScript via C++</h2>
     file_reader.readAsArrayBuffer(e.target.files[0]);
   }
 
+  var ffileOptimizeFileSize = function (e) {
+    const file_reader = new FileReader();
+    file_reader.onload = (event) => {
+      const json = AsposePdfOptimizeFileSize(event.target.result, e.target.files[0].name, 10, "ResultOptimizeFileSize.pdf");
+      if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
+      else document.getElementById('output').textContent = json.errorText;
+      DownloadFile(json.fileNameResult, "application/pdf");
+    }
+    file_reader.readAsArrayBuffer(e.target.files[0]);
+  }
+
 </script>
 
 <script>

README.md

@@ -93,6 +93,7 @@
       <option value="AsposePdfDeleteBlankPages">Delete blank pages from a PDF-file</option>
       <option value="AsposePdfEmbedFonts">Embed fonts a PDF-file</option>
       <option value="AsposePdfUnembedFonts">Unembed fonts a PDF-file</option>
+      <option value="AsposePdfOptimizeFileSize">Optimize size of PDF-file with image compression quality</option>
 
     <optgroup label="Metadata PDF">
       <option value="AsposePdfSetInfo">Set info (metadata) in a PDF-file</option>
@@ -325,6 +326,7 @@
             // AsposePdfReplaceFont, AsposePdfDeleteHiddenText, AsposePdfAddWatermark, AsposePdfDeleteWatermarks,
             // AsposePdfMergeLayers, AsposePdfFlatten, AsposePdfReplaceTextPages, AsposePdfMakeBooklet,
             // AsposePdfMakeNUp, AsposePdfDeleteBlankPages, AsposePdfAddStampPages, AsposePdfEmbedFonts, AsposePdfUnembedFonts,
+            // AsposePdfOptimizeFileSize
             DownloadFile(json.fileNameResult, "application/pdf", params[0]);
         }
       }
@@ -642,6 +644,11 @@
           transfer = [event.target.result];
           params = [event.target.result, ffile.name, columns, rows, `Result${operation}.pdf`];
           break;
+        case 'AsposePdfOptimizeFileSize':
+          const imageQuality = 25;
+          transfer = [event.target.result];
+          params = [event.target.result, ffile.name, imageQuality, `Result${operation}.pdf`];
+          break;
         default:
           // AsposePdfOptimize, AsposePdfAddPageNum, AsposePdfConvertToGrayscale, AsposePdfAConvertToPDF,
           // AsposePdfRemoveMetadata, AsposePdfRepair, AsposePdfOptimizeResource, AsposePdfDeleteAnnotations,

example.html

@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <meta charset="UTF-8">
+  <title>Aspose.PDF for JavaScript via C++</title>
+</head>
+
+<body>
+  <label for="filePdfOptimizeFileSize">Choose a PDF-file to optimize size with image compression quality</label>
+  <input type="file" id="filePdfOptimizeFileSize" accept="application/pdf" onchange="ffilePdfOptimizeFileSize(event)">
+  <br>
+  <pre id="output"></pre>
+</body>
+<!-- Load and initiate Aspose.PDF for JavaScript via C++ -->
+<script type="text/javascript" async src="AsposePDFforJS.js"></script>
+<script type="text/javascript">
+/// [Code snippet]
+  var ffilePdfOptimizeFileSize = function (e) {
+    const file_reader = new FileReader();
+    file_reader.onload = (event) => {
+      const imageQuality = 50;
+      /*Optimize size of PDF-file with image compression quality and save the "ResultPdfOptimizeFileSize.pdf"*/
+      const json = AsposePdfOptimizeFileSize(event.target.result, e.target.files[0].name, imageQuality, "ResultPdfOptimizeFileSize.pdf");
+      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/pdf");
+    };
+    file_reader.readAsArrayBuffer(e.target.files[0]);
+  };
+/// [Code snippet]
+</script>
+
+</html>

example_worker.html

@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <meta charset="UTF-8">
+  <title>Aspose.PDF for JavaScript via C++</title>
+</head>
+
+<body>
+  <label for="filePdfOptimizeFileSize">Choose a PDF-file to optimize size with image compression quality</label>
+  <input type="file" id="filePdfOptimizeFileSize" accept="application/pdf" onchange="ffilePdfOptimizeFileSize(event)">
+  <br>
+  <pre id="output">please wait for loading...</pre>
+</body>
+
+<script type="text/javascript">
+/// [Code snippet]
+  /*Create Web Worker*/
+  const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
+  AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
+  AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
+    (evt.data == 'ready') ? 'loaded!' :
+      (evt.data.json.errorCode == 0) ? `Result:\n${DownloadFile(evt.data.json.fileNameResult, "application/pdf", evt.data.params[0])}` : `Error: ${evt.data.json.errorText}`;
+
+  /*Event handler*/
+  const ffilePdfOptimizeFileSize = e => {
+    const file_reader = new FileReader();
+    file_reader.onload = event => {
+      const imageQuality = 50;
+      /*Optimize size of PDF-file with image compression quality and save the "ResultPdfOptimizeFileSize.pdf" - Ask Web Worker*/
+      AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfOptimizeFileSize', "params": [event.target.result, e.target.files[0].name, imageQuality, "ResultPdfOptimizeFileSize.pdf"] }, [event.target.result]);
+    };
+    file_reader.readAsArrayBuffer(e.target.files[0]);
+  };
+/// [Code snippet]
+
+  /*Make a link to download the result file*/
+  const DownloadFile = (filename, mime, content) => {
+      mime = mime || "application/octet-stream";
+      var link = document.createElement("a"); 
+      link.href = URL.createObjectURL(new Blob([content], {type: mime}));
+      link.download = filename;
+      link.innerHTML = "Click here to download the file " + filename;
+      document.body.appendChild(link); 
+      document.body.appendChild(document.createElement("br"));
+      return filename;
+    }
+</script>
+
+</html>