Syncfusion PDF

editing PDF documents with the Syncfusion .NET PDF Library, where the vendor's documentation for the library (updated 13 October 2026) says it can create, read and write PDF and lists support for adding text, images, tables and shapes, opening, modifying and saving existing PDFs, creating, filling and flattening forms including AcroForms and XFA, adding and modifying bookmarks, annotations, attachments, layers, hyperlinks, watermarks and barcodes, creating linearized PDFs, and compressing documents; the Edit PDF product page adds adding, removing and rearranging pages, applying watermarks and stamps, inserting, deleting, extracting and replacing images and adding or removing attachments; the documented editing is content creation and document modification through the library's APIs, and no claim is made of in-place editing or reflow of arbitrary existing text, of a user interface, or of an accuracy figure

converting documents to and from PDF with the Syncfusion .NET PDF Library, where the library overview lists conversion of HTML, RTF, Word, Excel, PowerPoint, SVG and XPS to PDF, and the document conversion page documents each direction with its required assemblies, including the limitation that Excel to PDF conversion works only in Blazor server-side and not in Blazor client-side, and names unsupported RTF elements; the product page adds conversion of images and TIFF to PDF and PDF to image through PdfToImageConverter, and conversion to PDF/A through the PDF conformance documentation, and the library is positioned for server-side creation and conversion; no PDF to Word, Excel or PowerPoint conversion is claimed here, no fidelity guarantee is given, and no hosted conversion service is claimed

merging and splitting PDF documents with the Syncfusion .NET PDF Library, where the vendor's Merge Documents page says the library supports merging multiple PDF documents from disk and streams using the Merge method of PdfDocumentBase, and the library overview lists merging and splitting PDF files, with the Split Documents page and document pages covering splitting and page import; the documented operation is programmatic merging and splitting of whole documents and pages, and no claim is made about preserving signatures, form data or annotations across a merge, or about a user interface, and no hosted service is claimed

digitally signing and validating PDF documents with the Syncfusion .NET PDF Library, where the Digital Signature page says the library can add a digital signature to a PDF document, that adding one needs a certificate with a private key, and that it supports PFX files, Hardware Security Module (HSM), Online Certificate Status Protocol (OCSP), Certificate Revocation List (CRL), the Windows Certificate Store and the Elliptic Curve Digital Signature Algorithm (ECDSA), using the PdfSignature class; the page also covers validating signatures, and the product FAQ confirms both signing a PDF form and validating a signature; the scope covers adding and validating certificate-based signatures with those certificate and validation routes, and no timestamping, long-term validation or certification-level claim is made

protecting PDF documents with the Syncfusion .NET PDF Library, where the library overview lists encrypting and decrypting PDF files with advanced standards and redacting text and images, the security documentation covers encryption and decryption, and the Redaction page says redacting permanently removes sensitive information by replacing the content within a specified rectangle with an optional fill colour, overlay text, image or pattern, and that the underlying text and graphics inside the redaction rectangle are removed during the Redact call and cannot be undone; the page also states that CJK text without a TrueType font and complex script text cannot be redacted, and that redaction on .NET Core needs the Syncfusion.Pdf.Imaging.Net.Core package; the scope covers encryption and decryption, permission settings as described, and the documented redaction with its stated limitations, with signing kept as the separate sign job

compressing PDF documents with the Syncfusion .NET PDF Library, where the library overview lists support to compress existing PDF files, and the Compression page says the library can compress an existing PDF document, compress the content of a new document and compress images in a new or existing document, using PdfLoadedDocument and PdfCompressionOptions, with supported techniques being compressing images with an image quality setting, optimizing embedded fonts, optimizing page contents and removing metadata information; the page also names the Imaging package needed on .NET Core; no size-reduction percentage, quality threshold or lossless guarantee is stated, and no hosted service is claimed

extracting text and images from PDF documents with the Syncfusion .NET PDF Library, where the Text Extraction page says the library can extract text from a particular page or the entire document, including line, word and glyph details with font, colour and bounding-rectangle information, and documents layout-based extraction through the ExtractText(bool) overload; the Image Extraction page says images can be extracted from a page or an entire PDF with ExtractImages and that PdfDocumentExtractor is available for lower memory consumption; the scope covers text and image extraction, and no OCR is claimed here because OCR is documented in a separate OCR Processor library, and no hosted service is claimed

running optical character recognition with Syncfusion's .NET OCR Processor, where the OCR documentation is published under Data Extraction rather than under the PDF Library, and says the .NET OCR Processor library processes OCR on scanned PDF documents and images with the help of Google's Tesseract OCR engine, converting scanned paper documents and images into searchable and editable data, and that an inbuilt image preprocessor prepares images with grayscale conversion, deskew, denoise, contrast adjustment and binarization; the OCR feature is therefore recorded as a separate library in the same Syncfusion Document SDK family rather than as a feature of the PDF Library, no accuracy figure or language count is stated on the page read, and no hosted OCR is claimed

creating accessible tagged PDF documents with the Syncfusion .NET PDF Library, where the Tagged PDF page says a tagged PDF includes structure defining reading order and meaning of elements such as figures, images, lists and tables, that tagged PDF documents created using the library are compliant with the Section 508 (PDF/UA) standard and the WCAG 2.0 standard (ISO 14289-1:2014), and that the section explains how to add tags to text, images, shapes, form fields, annotations, tables and lists, including tags through PdfStructureElement and alternative text through ActualText; the compliance statement is recorded as the vendor's own claim about documents created with the library, and no claim is made about remediating arbitrary existing PDFs or about certification by a third party