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PDF Generation Template Editor

Open-source visual PDF generation engine with customizable templates and developer-friendly APIs.

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Features List ​

ComPDF provides various operational APIs and their respective parameters. You can find detailed explanations in the Feature List section.

Annotations ​

  • Create, edit, delete, and reply to annotations. These annotations include annotation types such as highlight, underline, strikethrough, stamp, link, text, line, rectangle, circle, squiggly line, freehand drawing, and audio.
  • Support for adjusting the appearance of annotations.
  • Import and export annotation data in XFDF format.
  • Support for flattening annotations.
  • Predefined annotation styles.

Forms ​

  • Create, edit, and delete form fields, including buttons, checkboxes, radio buttons, text fields, dropdowns, list boxes, and signature fields.
  • Fill in PDF forms.
  • Support for flattening PDF forms.

Signatures ​

  • Draw signatures.
  • Image signatures.
  • Typed signatures.

Document Editor ​

  • PDF manipulation, including Split pages, Extract pages, and Merge pages.
  • Page edit, including Delete pages, Insert pages, Crop pages, Move pages, Rotate pages, Replace pages, and Exchange pages.
  • Document information setting.
  • Extract images.

Content Editor ​

  • Add and remove text in a PDF programmatically, and edit the PDF similar to Word.
  • Support for editing PDF images, such as moving, rotating, scaling, mirroring, cropping, replacing, copying, and extracting.
  • Undo or redo any changes.

Security ​

  • Encrypt and decrypt PDF, including setting permissions and password protection.

Watermark ​

  • Add, remove, edit, update, and get the watermarks.
  • Support text and image watermarks.

Compare Documents ​

  • Content comparison (also known as side-by-side comparison).
  • Overlay comparison (also known as superimpose comparison).

Conversion ​

  • Convert from PDFs:

    • PDF to Word.
    • PDF to Excel.
    • PDF to Slides.
    • PDF to Image.
    • PDF to HTML.
    • PDF to TXT.
    • PDF to RTF.
    • PDF to CSV.
    • PDF to JSON.
    • PDF to Editable PDF。
    • PDF to OFD.

  • Convert to PDFs:

    • Word to PDF.
    • Excel to PDF.
    • Slides to PDF.
    • PNG to PDF.
    • JPG to PDF.
    • HTML to PDF.
    • TXT to PDF.
    • RTF to PDF.
    • CSV to PDF.
    • TIFF to PDF.

  • Convert from Images：

    • Image to Word。
    • Image to Excel。
    • Image to Slide。
    • Image to HTML。
    • Image to TXT。
    • Image to CSV。
    • Image to RTF。
    • Image to OFD。

Document AI: ​

  • OCR.
  • Image Sharpening Enhancement.
  • Form Recognizer.
  • Trim Correction.
  • Layout Analysis.
  • Stamp Inspection.

PDF specification: ​

  • PDF specification conversion.

PDF Generation: ​

  • PDF Generation.