Tamper-Proof Digital Signatures to Protect PDF Security
Create and verify Digital Certificates and Digital Signatures to safeguard PDF contracts and documents, avoiding data tampering and ensuring data integrity and security.
Credibility and Validity
ComPDFKit's Digital Signatures verify whether PDF files have been tampered with by using Digital Certificates to parse the abstract of documents, so as to guarantee the authenticity and legality of PDFs.
Guides 
Protect with Encryption & Trust Certificates
Explore All FeaturesVerify Reliability
Cryptographic signatures validate if the source is reliable with .P12 or .PFX certificates, building a secure digital communication and interaction environment.
Prevent Being Falsify
Verify that PDF documents have not been falsified and distorted by using a variety of cryptographic algorithms, including RSA, MD2, MD4, MD5, SHA-1, SHA-256, and more.
Secure and Mighty Digital Signatures
Explore All FeaturesVisualize Digital Signatures
Optionally insert visible and invisible digital signatures into PDFs, sign by drawing, typing, or uploading images.
Sign to Avoid Tamper
A wide range of signing algorithms and methods prevent the data of PDF documents from being tampered with.
A Sorts of Certificates
Use digital certificates issued by the Certificate Authority or generate a self-signed certificate.
Flexibilize Signing Processes
Embed Digital Signatures into any different stages of workflows to improve work efficiency and productivity.
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Digital Signatures VS. Electronic Signatures
Which Is Your Choice?
Digital Signatures
Create a specific signature with a unique digital ID.
Tamper evident through a unique identifier issued by CA and self-signed certificates.
Use For:
High-security, compliance-driven, and regulated transactions.
Use In:
Property purchase agreements, lease agreements, and mortgage documents.
Electronic health records, medical documents, and consent for surgery
Legal agreements, and court documents.
Loan agreements, financial contracts, fund transfers, and transactions.
Electronic Signatures
Freehand, type text, or insert images as signing annotations in PDFs.
Verify identity with various methods (e.g., email, PIN).
Use For:
Routine, day-to-day business processes, and collaborative workflows.
Use In:
Purchase orders, shipping documents, and supplier contracts.
Employment contracts, onboarding documents, and performance reviews.
Enrollment forms, student agreements, and permission slips.
More Features
More libraries are given to shorten your project's development cycle.
Explore All ComponentsViewer
Smoothly view and render PDFs accurately and fast.
Annotations
Efficiently add & edit rich annotations and markups.
Document Editor
Quickly edit and manipulate PDF pages.
Forms
Process fillable and static PDF forms with ease.
Content Editor
Edit PDF text and images directly like in Word.
Advanced
More cutting-edge features like comparing documents, OCR, security, measurement, etc.
Conversion
High-fidelity convert PDF to/from multiple file formats.
30 Days Free Trial
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Blog
ComPDFKit PDF SDK 1.10.0: Digital Signatures
Guides
Learn more about integrating Digital Signatures.
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