Sign Multiple PDFs with USB DSC & Digital Certificates
Bulk PDF digital signature made simple. Upload hundreds of PDFs, place your signature once, and sign them all instantly using your USB token, Smart Card, eToken, or PFX certificate. 100% local — files never leave your machine.
Drag & Drop PDF Files Here
or click to browse your files
Smart Card & Token
Support for USB Tokens, eTokens, DSC, and QSCD devices from all major providers
Local Signing
Zero trust — PDFs never leave your machine. All cryptographic operations run locally
Bulk Signing
Sign hundreds of PDFs at once with progress tracking and batch operations
PAdES Compliant
SHA-256/384/512, RSA, ECC, RFC3161 timestamps, and Long Term Validation
How to Bulk Sign PDFs with USB DSC — Step by Step
Bulk PDF Signer Pro is the easiest way to sign multiple PDFs at once using your USB DSC (Digital Signature Certificate), Smart Card, eToken, or PFX file. Follow these 4 simple steps:
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Step 1 — Upload Multiple PDF Files
Drag and drop multiple PDF files into the upload zone. You can upload hundreds of PDFs at once for batch digital signing.
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Step 2 — Place Your Digital Signature
Use the built-in PDF viewer to position your signature stamp. Set it to apply to all pages or specific pages across all files.
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Step 3 — Select Your USB DSC Certificate
Click "Detect Certificates" to auto-detect your USB token (eMudhra, SafeNet, ProxKey, Gemalto, Feitian, WatchData). Or upload a PFX / P12 / PKCS12 file.
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Step 4 — Sign All PDFs & Download
Click "Sign All PDFs" to digitally sign every document. Download all signed PDFs in a single ZIP file. Your files are processed locally — nothing is uploaded to any server.
Frequently Asked Questions — Online Bulk PDF Digital Signature
What is bulk PDF digital signature?
Bulk PDF digital signature is the process of applying a legally valid digital signature (DSC) to multiple PDF documents at once — without signing each file one by one. It is widely used by businesses, CAs, government agencies, and professionals who need to sign hundreds of invoices, certificates, or contracts quickly using a single USB token or smart card.
How to sign multiple PDFs at once using USB DSC?
With Bulk PDF Signer Pro, signing multiple PDFs at once is simple: insert your USB DSC token, upload your PDFs, position your signature, select your certificate, and click Sign All. The tool processes every file in batch and downloads them together. No software installation needed — it runs directly in your browser.
Is online bulk PDF esign secure?
Yes. Our online bulk PDF esign is extremely secure because all cryptographic signing operations happen entirely on your local computer. Your PDF files are never uploaded to any server. The private key on your USB token or smart card never leaves the device — only the signed output is returned to the browser.
Which DSC tokens are supported for bulk PDF signing?
Bulk PDF Signer Pro supports all major USB DSC tokens: eMudhra, SafeNet (Gemalto), ProxKey, WatchData, Feitian, Entrust, Aladdin eToken, and any PKCS#11 or CNG-compatible smart card. PFX / P12 / PKCS12 file certificates are also fully supported.
Is bulk PDF digital signature legally valid in India?
Yes. Digital signatures applied using a Class 3 DSC issued by a licensed Certifying Authority (CA) under the Controller of Certifying Authorities (CCA) are legally valid under the Information Technology Act, 2000 in India. Bulk PDF Signer Pro creates PAdES-compliant signatures using your existing government-recognised DSC, making every signed document court-admissible.
Can I sign bulk PDFs digitally for free?
Yes! Bulk PDF Signer Pro is free to use. Simply bring your own DSC (USB token or PFX file) and sign as many PDFs as you need — no subscription, no per-document fee, no file size limits beyond browser memory.
What signature formats are supported?
The tool supports PAdES (PDF Advanced Electronic Signatures) compliant signatures with SHA-256, SHA-384, and SHA-512 hash algorithms. It also supports RSA and ECC key types, RFC3161 trusted timestamps, and Long Term Validation (LTV) for archival-grade signatures.
Why Choose Bulk PDF Signer Pro for Online Bulk PDF Digital Signature?
- ✅ Bulk PDF digital signature — sign hundreds of PDFs in one batch operation
- ✅ USB DSC & Smart Card support — works with all Indian CAs and global token vendors
- ✅ 100% local signing — your PDFs never leave your computer
- ✅ PAdES compliant — court-admissible, legally valid digital signatures
- ✅ Free online bulk PDF esign — no software installation required
- ✅ PFX / P12 / PKCS12 support — file-based certificates welcome
- ✅ Sign multiple PDFs at once — batch download as ZIP
- ✅ RFC3161 timestamp — timestamped signatures for LTV and archival
- ✅ Signature placement control — position on any page, all pages, or custom range
- ✅ Works on Windows, macOS, Linux — browser-based, cross-platform