PDF Signature Validator

PDF Signature Validator is your all-in-one digital signature checker, PKI certificate verifier, and offline QR code scanner for PDF documents and physical files. Cryptographically verify e-signatures, detect document tampering, stamp visual trust marks, and scan document QR codes instantly and securely.

Whether you need to verify government e-documents, legal contracts, signed invoices, DigiLocker certificates, e-Aadhaar cards, tax receipts, or printed ID codes, PDF Validate gives you instant, trustworthy verification results.

🔐 KEY FEATURES & DIGITAL SIGNATURE VERIFICATION
• Cryptographic Signature Check: Extracts and verifies X.509 signature fields, public keys, and certificate trust chains in any PDF.
• Tamper & Alteration Detection: Instantly alerts you if a document was modified, edited, or corrupted after signing.
• Visual Trust Stamping: Embeds a clean "Verified Signature" visual watermark on validated PDFs for easy sharing.
• Certificate Details Inspection: Displays signer name, email, Certificate Authority (CA), timestamp, and validity status.
• Document Integrity Shield: Verifies e-Signatures from Adobe Sign, DocuSign, DigiLocker, eMudhra, Tax Authorities, and custom PKI servers.

📸 OFFLINE CAMERA & PDF QR/BARCODE SCANNER
• Physical Document Scanner: Scan QR codes and Barcodes directly from paper documents, invoices, or ID cards using your camera.
• Smart Zoom Control: Pinch-to-zoom and 1x, 1.5x, 2x, 3x touch presets capture tiny, dense, or low-light QR codes.
• Encrypted PDF Decryption: Securely decrypt password-protected PDFs (e-Aadhaar, bank statements) in-memory to scan embedded QR codes.
• Instant Data Extraction: Clean and parse raw QR contents including URLs, JSON payloads, e-Way bills, tax details, and plain text.

📄 BULK SIGNATURE & DOCUMENT VERIFICATION
• Process up to 10 PDF documents simultaneously with Bulk Verification — built for high-volume auditing, HR compliance, and legal reviews.

📂 LOCAL HISTORY & OFFLINE ACCESS
• Past verification reports and scanned QR logs are safely archived locally on your device for instant offline lookup anytime.

🔒 PRIVACY-FIRST & ON-DEVICE SECURITY
Your sensitive documents stay 100% private. All signature calculations, PDF rendering, and ML Kit QR scanning execute entirely on-device in-memory. Zero document contents, images, or passwords are ever uploaded or saved on remote servers.

🎁 DAILY FREE QUOTAS (RESETS DAILY)
Start using PDF Validate for free right away with daily resetting credits:
• Guest Mode (No Sign-In): 2 PDF Signature Verifications + 5 QR/Barcode Scans free every day!
• Google Sign-In (Free Account): 5 PDF Signature Verifications + 10 QR/Barcode Scans free every day!
• Auto-Reset: Free quotas automatically reset daily at midnight.

💳 FLEXIBLE TOP-UP PACKS (NO SUBSCRIPTIONS)
Need more checks or bulk batches? Upgrade anytime with top-up credit packs. No subscriptions or recurring charges — unlocked credits never expire!

Top-Up Credit Pricing:
• 100 Credits: ₹100 INR / $1.29 USD
• 300 Credits: ₹200 INR / $2.49 USD
• 500 Credits: ₹400 INR / $4.99 USD
• 1000 Credits: ₹500 INR / $5.99 USD (Best Value — Save Big!)

Unlocked credits can be used for signature verifications, QR scans, and bulk document processing anytime.

🏢 BUILT FOR PROFESSIONALS & EVERYDAY USE
• Lawyers & Legal Teams: Validate court filings, NDA agreements, and contracts.
• Government & Regulatory: Authenticate e-Aadhaar cards, DigiLocker certificates, MCA filings, and Income Tax documents.
• Accountants & Auditors: Verify digital signatures on GST invoices, tax returns, and audit reports.
• HR & Compliance Officers: Check employee verification forms and credential PDFs.

Download PDF Signature Validator today for fast, private, and cryptographic PDF signature check and QR verification!