Trusted By India's Biggest Brands
Trusted By India's Biggest Brands
A comprehensive solution designed to give you ironclad legal protection with IT Act-compliant digital signing.
Compatible with all USB tokens, Class 2 & 3 DSC from any licensed Certifying Authority in India.
Enable multiple authorized signatories to sign the same document with their individual certificates.
Sign hundreds of documents in a single batch operation, saving valuable time and effort.
Fully compliant with IT Act 2000 & Indian Evidence Act, ensuring your signatures hold legal validity.
Cryptographically secure timestamps and tamper-evident seals ensure document integrity and non-repudiation.
Enhanced security with a fully offline desktop application that never uploads your sensitive documents to any server.
Signatures remain valid even after certificate expiry with secure timestamps and tamper-proofing.
Choose where your signature appears, first page, last, all pages; customize look and metadata as needed.
Secured signing with SHA-256, 384, 512 algo, RSA 2048-bit encryption, along with PAdES ETSI EN 319 142-1 compliance.
Four simple steps to legally sign your PDF documents
Select single or multiple PDF files from your computer
Insert your USB token and enter your PIN when prompted
Choose signature position, appearance, and other settings
Complete the signing process and save your signed documents
Transform your document workflows with legally valid digital signatures that save time, money, and resources.
Sign documents in seconds instead of days. No more printing, physical signing, scanning, and courier delays.
Eliminate printing, storage, and courier costs. Save on paper, ink, filing cabinets, and physical storage space.
Cryptographic signatures provide tamper-evidence, non-repudiation, and verification of signer identity.
Reduce your carbon footprint by eliminating paper usage and associated transportation emissions.
Digital signatures are legally recognized under Indian IT Act, 2000 and Indian Evidence Act, providing the same legal status as handwritten signatures.
Our digital signature solution is fully compliant with Indian regulations, ensuring your signed documents are legally valid and enforceable.
Digitally sign critical documents - faster, safer, and fully compliant.
Sign legal agreements, contracts, NDAs, and licensing documents with full compliance.
Quickly sign and issue appointment letters, onboarding docs, and salary slips.
Digitally sign sales contracts, agreements, distributor documents, and more for vendor relationship.
Securely sign IP licensing, confidentiality, and legal documents for IP protection.
Sign invoices, POs, balance sheets, and MIS reports without printing a single page.
Easily sign government tenders, bid submissions, and procurement forms digitally.
Sign student records, certificates, admission letters, and affiliation documents.
Sign prescriptions, lab reports, compliance declarations, and patient consent forms.
See How 1.5 Lakh+ Users Are simplifying Their Tax Compliance With Us
"1 Cloud Base Is Good 2 Can Used From Anywhere 3 Single Click GSTR1/ 3B Downloads. 4 2B Reco. 5. Auto 2B Email To Clients And Email Feature To Some More Points Demo Given By Your Person With Good Explanation And Example Live"
"Awesome Support System. They Will Resolve Your Queries From All Perspectives. Some Of The Support Staff Are Very Cooperative. I Have Talked With Shyam. He Is Such A Nice And Kind Person. Thanks And All The Very Best",
"Nice Software Using For Last More Than 10yrs Since I Was Doing Articleship. Its Presentation Style Is Very Good In Compare To All Other Softwares In Market I Highly Recommend The Same.",
Their Support centre is Simply Amazing They Solve Your Problems in a Minute . I have some technical Isuue Their Representive Vishal bansal Solve my issues with in a
"I Had Great Experience From Miss Khushboo Agarwal For Issue Related To KDK Tds Excel Export. She Had A Very Good Knowledge And A Very Kind Tone. That's Excellent Issue Resolve In Just Few Minutes. 5 Star For Support.",
"Thank You So Much Really Fast Response From KDK Software Team Especially Vishal Sir Response Great Within Limited Time Period He Did Wonderful Task And Resolve My Problem Thank You Sir And Thank You KDK Software Team",
"1 Cloud Base Is Good 2 Can Used From Anywhere 3 Single Click GSTR1/ 3B Downloads. 4 2B Reco. 5. Auto 2B Email To Clients And Email Feature To Some More Points Demo Given By Your Person With Good Explanation And Example Live"
Their Support centre is Simply Amazing They Solve Your Problems in a Minute . I have some technical Isuue Their Representive Vishal bansal Solve my issues with in a
"I Had Great Experience From Miss Khushboo Agarwal For Issue Related To KDK Tds Excel Export. She Had A Very Good Knowledge And A Very Kind Tone. That's Excellent Issue Resolve In Just Few Minutes. 5 Star For Support.",
"Thank You So Much Really Fast Response From KDK Software Team Especially Vishal Sir Response Great Within Limited Time Period He Did Wonderful Task And Resolve My Problem Thank You Sir And Thank You KDK Software Team",
"1 Cloud Base Is Good 2 Can Used From Anywhere 3 Single Click GSTR1/ 3B Downloads. 4 2B Reco. 5. Auto 2B Email To Clients And Email Feature To Some More Points Demo Given By Your Person With Good Explanation And Example Live"
"Awesome Support System. They Will Resolve Your Queries From All Perspectives. Some Of The Support Staff Are Very Cooperative. I Have Talked With Shyam. He Is Such A Nice And Kind Person. Thanks And All The Very Best",
"Nice Software Using For Last More Than 10yrs Since I Was Doing Articleship. Its Presentation Style Is Very Good In Compare To All Other Softwares In Market I Highly Recommend The Same.",
"Thank You So Much Really Fast Response From KDK Software Team Especially Vishal Sir Response Great Within Limited Time Period He Did Wonderful Task And Resolve My Problem Thank You Sir And Thank You KDK Software Team",
"1 Cloud Base Is Good 2 Can Used From Anywhere 3 Single Click GSTR1/ 3B Downloads. 4 2B Reco. 5. Auto 2B Email To Clients And Email Feature To Some More Points Demo Given By Your Person With Good Explanation And Example Live"
"Awesome Support System. They Will Resolve Your Queries From All Perspectives. Some Of The Support Staff Are Very Cooperative. I Have Talked With Shyam. He Is Such A Nice And Kind Person. Thanks And All The Very Best",
"Nice Software Using For Last More Than 10yrs Since I Was Doing Articleship. Its Presentation Style Is Very Good In Compare To All Other Softwares In Market I Highly Recommend The Same.",
Their Support centre is Simply Amazing They Solve Your Problems in a Minute . I have some technical Isuue Their Representive Vishal bansal Solve my issues with in a
"I Had Great Experience From Miss Khushboo Agarwal For Issue Related To KDK Tds Excel Export. She Had A Very Good Knowledge And A Very Kind Tone. That's Excellent Issue Resolve In Just Few Minutes. 5 Star For Support.",
"Thank You So Much Really Fast Response From KDK Software Team Especially Vishal Sir Response Great Within Limited Time Period He Did Wonderful Task And Resolve My Problem Thank You Sir And Thank You KDK Software Team",
From multi-client handling to data security—here’s everything you need to know before you switch to a smarter tax filing suite.
Yes. KDK PDF Signer is fully compliant with the Indian IT Act, 2000. It supports X.509 digital certificates issued by licensed Certifying Authorities in India, ensuring your digitally signed legal documents and contracts are legally valid and enforceable.
You can use the software to sign a wide range of documents including but not limited to Salary Slips, Appointment Letters, NDAs (Non-Disclosure Agreements), Sales Contracts, Vendor & Supplier Agreements, Intellectual Property Licensing Documents, Employee Onboarding Documents, Distributor Agreements, Any legal or administrative document in PDF format.
Absolutely. KDK PDF Signer is designed to handle bulk signing of PDF files, making it ideal for CA firms, HR teams, legal departments, and businesses managing high document volumes.
KDK PDF Signer is a desktop application and requires: Windows 2000 / XP / Vista / 8 / 10, Minimum 2 GB RAM, At least 1 GB of free hard disk space, Pentium IV or higher processor.
Yes, the software supports Class 2 and Class 3 DSCs issued by any licensed Certifying Authority in India. It reads from USB token devices and complies with Public Key Infrastructure (PKI) norms.
Yes. It uses cryptographic algorithms (SHA256) and timestamps to ensure integrity and non-repudiation. Audit trails are also maintained for compliance and traceability.
You only need internet access to validate the certificate with the Certifying Authority. Once your DSC is installed, signing works offline too.