PDF Optimizer 在各方面對PDF文件進行優化。各種復雜功能的組合允許在沒有或最小的視覺質量損失的情況下實現高壓縮。另一個應用是為打印優化PDF，通過合并嵌入式字體來減少線軸文件的大小，并應用設備特定的色彩空間轉換。

PDF Optimizer 有不同的使用版本：作為Shell在命令行上使用，作為被監視的文件夾服務和作為API在C#、Visual Basic、Java、C/C++中使用。

主要優化項目

在代碼實現中，操作比較方便，也支持Windows和Linux開發包，具體的類庫和實現代碼看下面：

PDF Optimizer下載

// c#代碼
using (Optimizer optimizer = new Optimizer())
{
    // Choose the optimization profile for archiving
    optimizer.Profile = PDFOptimizationProfile.eOptimizationProfileArchive;

    // Open input file
    if (!optimizer.Open(inputPath, ""))
        throw new Exception(String.Format("Input file {0} cannot be opened. " +
            "{1} (ErrorCode: 0x{2:x}).", inputPath, optimizer.ErrorMessage, optimizer.ErrorCode));

    // Save output file
    if (!optimizer.SaveAs(outputPath, "", "", PDFPermission.ePermNoEncryption))
        throw new Exception(String.Format("Output file {0} cannot be created. " +
            "{1} (ErrorCode: 0x{2:x}).", outputPath, optimizer.ErrorMessage, optimizer.ErrorCode));

    // Close input file
    if (!optimizer.Close())
        throw new Exception(String.Format("Input file {0} cannot be closed. " +
            "{1} (ErrorCode: 0x{2:x}).", inputPath, optimizer.ErrorMessage, optimizer.ErrorCode));
}

// Java代碼
optimizer = new PdfOptimize();

// Choose the optimization profile for archiving
optimizer.setProfile(PdfOptimize.OPTIMIZATIONPROFILE.eOptimizationProfileArchive);

// Open input file
if (!optimizer.open(inputPath, "")) 
    throw new IOException(String.format("Input file %s cannot be opened. %s (ErrorCode: 0x%08x).",
        inputPath, optimizer.getErrorMessage(), optimizer.getErrorCode()));

// Save output file
if (!optimizer.saveAs(outputPath, "", "", NativeLibrary.PERMISSION.ePermNoEncryption)) 
    throw new IOException(String.format("Output file %s cannot be created. %s (ErrorCode: 0x%08x).",
        outputPath, optimizer.getErrorMessage(), optimizer.getErrorCode()));

// Close input file
if (!optimizer.close())
    throw new IOException(String.format("Input file %s cannot be closed. %s (ErrorCode: 0x%08x).",
        inputPath, optimizer.getErrorMessage(), optimizer.getErrorCode()));

// C++代碼
pOptimizer = PdfOptimizeCreateObject();

// Choose the optimization profile for archiving
PdfOptimizeSetProfile(pOptimizer, eOptimizationProfileArchive);

// Open input file
if (!PdfOptimizeOpen(pOptimizer, szInputPath, _T("")))
{
    _tprintf(_T("Input file %s cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInputPath,
        PdfOptimizeGetErrorMessage(pOptimizer), PdfOptimizeGetErrorCode(pOptimizer));
    iReturnValue = 1;
    goto cleanup;
}

// Save output file
if (!PdfOptimizeSaveAs(pOptimizer, szOutputPath, _T(""), _T(""), ePermNoEncryption))
{
    _tprintf(_T("Output file %s cannot be created. %s (ErrorCode: 0x%08x).\n"), szOutputPath,
        PdfOptimizeGetErrorMessage(pOptimizer), PdfOptimizeGetErrorCode(pOptimizer));
    iReturnValue = 1;
    goto cleanup;
}

// Close input amd output files
if (!PdfOptimizeClose(pOptimizer))
{
    _tprintf(_T("Input file %s cannot be closed. %s (ErrorCode: 0x%08x).\n"), szInputPath,
        PdfOptimizeGetErrorMessage(pOptimizer), PdfOptimizeGetErrorCode(pOptimizer));
    iReturnValue = 1;
    goto cleanup;
}