Online PDF Signer for
Secure Digital Signatures

Sign PDFs online with X.509 digital certificates, precise visual signature placement, and bulk signing workflows. Handle password-protected documents, then download or share signed PDFs by email—all through a convenient web-based platform.

Zen PDF Signer Screenshot

Why Choose Our Digital PDF Signing Software

Sign PDFs using Digital Signature Certificates, position signatures with a visual preview, process documents in bulk, and simplify document signing through a connected workflow.

Digital Signature Certificate Support

Digitally sign PDF documents using supported X.509 Digital Signature Certificates. Check certificate and USB token compatibility to choose the right signing setup for your workflow.

Multiple Signatures per PDF

Handle documents that require multiple authorised signatories. Each signer can apply their digital signature using their individual certificate within the supported signing workflow.

Bulk PDF Signing

Sign multiple PDF files in a batch instead of processing each document individually. Simplify repetitive tasks such as signing salary slips, invoices, reports, contracts, and other business documents.

Sign Password-Protected PDFs

Work with supported password-protected PDF files as well as regular PDFs. Follow the applicable document access steps and sign eligible files without unnecessarily changing your established document workflow.

Visual Signature Placement

Preview your PDF and choose where the digital signature should appear on the document. Position signatures more precisely instead of relying only on a fixed placement, subject to the available signing options.

Convenient Web-Based Workflow

Access the signing workflow through a web-based interface, preview documents, complete supported signing steps, and download or share the resulting PDF according to your workflow requirements.

Signed Document History

Keep track of document signing activity across your workflow. Review available document records and retrieve signed files when needed, helping your team maintain an organised record of completed signing tasks.

Customisable Signature Appearance

Choose the signature position and available appearance options to suit the document. Use visual placement to make signed salary slips, contracts, agreements, and business PDFs easier to review.

Document Integrity & Signature Validation

Certificate-based digital signatures can help recipients verify the signer and identify changes made to signed PDF content. Supported validation features and legal effect depend on the certificate, signature format, and applicable requirements.

How to Sign a PDF with a Digital Signature

Follow four simple steps to sign PDF documents, position your signature, and save or share the signed files.

1

Select Your PDF Files

Choose one or multiple PDF files to sign, including supported password-protected documents.

2

Choose Your Digital Signature

Select your supported Digital Signature Certificate (DSC) and connect your USB token if required.

3

Preview & Position Your Signature

Preview the PDF and choose the precise position and available appearance settings for your signature.

4

Sign, Download & Share

Complete the signing process, then download your signed PDF or share it by email using the available options.

Benefits of Online PDF Digital Signatures

Simplify document signing with web-based PDF signing software that helps your team save time, reduce paperwork, protect document integrity, and manage signed files more efficiently.

Benefits of online PDF signing, digital signatures, and paperless document workflows
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Faster PDF Signing & Turnaround

Sign PDF documents digitally without the repeated steps of printing, physically signing, scanning, and couriering paperwork. Bulk signing can also help speed up repetitive document workflows.

Lower Paperwork & Operating Costs

Reduce routine printing, paper, ink, physical storage, and document delivery requirements. Digital PDF signing helps businesses move towards more efficient and less paper-dependent processes.

Document Integrity & Signature Verification

Certificate-based digital signatures help recipients verify signature details and identify changes that may affect document integrity. Verification depends on the certificate, signature format, and compatible PDF validation tools.

Paperless & More Efficient Workflows

Reduce dependence on physical documents and transport by managing PDF signing digitally. Help your team organise document workflows while reducing paper consumption and associated delivery requirements.

Legal Recognition & Compliance Awareness

Digital signatures created using eligible digital signature certificates may have legal recognition under applicable Indian law. Their legal effect depends on the signing method, certificate, document, and relevant statutory requirements.

Digital Signature Legal Validity & Compliance

Understand the legal framework for digital signatures and electronic records in India. PDF Signer supports certificate-based digital signing workflows, helping users sign, verify, and manage PDF documents with greater confidence.

  • Supports digital signature workflows under the Information Technology Act, 2000, where applicable
  • Recognises that electronic records are subject to applicable evidence and admissibility requirements
  • Supports Digital Signature Certificates issued by licensed Certifying Authorities, subject to certificate compatibility
  • Uses certificate-based cryptographic signing workflows to help protect document integrity
  • Helps users verify signature details and maintain organised document records
Learn more about digital signature security & compliance

Information Technology Act, 2000

The Information Technology Act, 2000 establishes the legal framework for electronic records and digital signatures in India. Section 3 addresses authentication of electronic records using digital signatures, while Section 3A covers electronic signature methods recognised under the Act.

The legal effect of a digital signature depends on the signing method, certificate, document, and applicable legal requirements.

Bharatiya Sakshya Adhiniyam, 2023

The Bharatiya Sakshya Adhiniyam, 2023 governs evidentiary rules for electronic and digital records. Sections 61–63 address the legal effect and admissibility of electronic or digital records, subject to the applicable statutory conditions.

Electronic records may be admissible when the relevant statutory requirements are met; admissibility is not guaranteed by signing software alone.

Electronic Agreements & Signatures

Section 85 of the Bharatiya Sakshya Adhiniyam, 2023 addresses the presumption relating to electronic agreements bearing the electronic or digital signatures of the parties. Its application depends on the circumstances and the requirements of the law.

Electronic agreements and digital signatures are assessed under the applicable law and the facts of each case.

PKI & Digital Signature Verification

Public Key Infrastructure (PKI) uses cryptographic keys and digital certificates to support identity verification and the authentication of digitally signed records. Verification results depend on certificate status, signature integrity, and the tools used to validate the PDF.

Certificate-based signing helps recipients check signature information and detect changes that may affect document integrity.

PDF Digital Signature Use Cases Across Industries

Sign contracts, business records, financial reports, and other important PDF documents with a streamlined digital signing workflow.

Legal Documents & Contracts

Sign PDF contracts, non-disclosure agreements, licensing documents, and business agreements using a digital signing workflow suited to your document requirements.

ContractsNDAs

HR & Employee Documents

Prepare signed PDF appointment letters, employee onboarding documents, salary records, policy acknowledgements, and internal HR paperwork.

Salary SlipsOnboarding

Sales & Vendor Documents

Sign sales agreements, vendor contracts, purchase-related documents, and distributor paperwork to help streamline business transactions and supplier coordination.

AgreementsContractsInvoices

Intellectual Property & Confidentiality

Manage signed PDF licensing agreements, confidentiality documents, intellectual property permissions, and related records with a consistent signing process.

IP LicensingConfidentiality Docs

Finance & Accounting

Digitally sign PDF invoices, purchase orders, financial statements, balance sheets, and management reports as part of your finance and accounting workflow.

InvoicesBalance Sheets

Tenders & Bid Submissions

Sign tender documents, bid submissions, declarations, and procurement paperwork with a PDF signing workflow designed to support time-sensitive submissions.

Tender DocsE-Procurement

Education & Training

Sign PDF certificates, admission letters, student records, institutional agreements, and administrative documents for education-related workflows.

CertificatesAdmission Letters

Healthcare & Pharmaceuticals

Sign suitable PDF reports, administrative records, compliance documents, and consent forms, subject to applicable healthcare and record-keeping requirements.

ReportsCompliance Docs

Frequently Asked Questions About PDF Digital Signing

Learn about digital signature validity in India, DSC certificate compatibility, bulk PDF signing, document security, and the requirements for choosing the right PDF signing solution.

Are digital signatures created with PDF Signer legally valid in India?
Digital signatures created using eligible Digital Signature Certificates and compliant signing methods may receive legal recognition under the Information Technology Act, 2000. Legal validity and enforceability depend on the certificate, signing method, document, and applicable legal requirements. Electronic records may also be subject to evidentiary requirements under the Bharatiya Sakshya Adhiniyam, 2023.
What types of PDF documents can I digitally sign?
PDF signing can be used for many business and professional documents, including salary slips, appointment letters, non-disclosure agreements (NDAs), sales contracts, vendor and supplier agreements, intellectual property licensing documents, employee onboarding records, distributor agreements, invoices, and other PDF documents. The suitability of a digital signature depends on the document and the requirements of the receiving organisation.
Does PDF Signer support bulk PDF signing?
Bulk PDF signing helps professionals and businesses process multiple documents more efficiently. It can be useful for CA firms, HR departments, finance teams, legal professionals, and organisations that regularly sign salary slips, invoices, contracts, certificates, and other business records. Availability and workflow depend on the specific PDF Signer product and edition.
What are the system requirements for PDF Signer?
System requirements depend on the PDF Signer edition you use. For a desktop version, check the current supported Windows versions, processor, RAM, storage, and any required drivers for your DSC USB token before installation. For a web-based signing workflow, browser compatibility and internet access requirements may differ. Refer to the product's current documentation for the applicable requirements.
Can I use my DSC (Digital Signature Certificate) with PDF Signer?
A compatible DSC can be used to create a certificate-based digital signature. Compatibility depends on the PDF Signer edition, certificate type, USB token, token drivers, and supported cryptographic components. Before signing important documents, confirm that your certificate and token are supported and that the resulting signature can be validated by the intended recipient.
Is PDF digital signing secure for confidential business documents?
Certificate-based digital signatures use cryptographic techniques to help authenticate the signer and detect changes made to a signed document. Security also depends on how certificates and private keys are protected, how documents are processed and stored, and which signing method is used. Review the product's security and data-handling practices before using it for confidential or sensitive documents.
Do I need an internet connection to digitally sign PDFs?
Internet requirements depend on the PDF Signer version and signing workflow. Some desktop signing solutions can apply a signature locally using a compatible DSC token, while internet access may be needed for certificate-status checks, trusted timestamp services, licence activation, or software updates. Web-based workflows may require an active connection to access the application. Check the relevant product documentation for exact requirements.