Instantly verify the authenticity of any digitally signed PDF. Check eIDAS, ZertES, and X.509 signatures — free, public, no account needed.
Loading validator…
Powered by chvalidator.ch — built by Swiss Trust Layer AG
The Swiss Trust Layer Validator recognises all major digital signature standards used across Europe and internationally.
EU Qualified Electronic Signature — legally equivalent to a handwritten signature in all 27 EU member states.
Swiss Qualified Electronic Signature (SR 943.03) — court-admissible under Swiss federal law.
Industry-standard public key certificates used in TLS, S/MIME, code signing, and document signing.
PDF Advanced Electronic Signatures — ETSI EN 319 132 compliant, the international standard for signed PDF documents.
Cryptographic Message Syntax — underlying format for most digital signature schemes including S/MIME and PDF.
| Tool | Cost | eIDAS | ZertES | No account needed |
|---|---|---|---|---|
| Swiss Trust Layer | Free | |||
| DocuSign | Paid | No | No | |
| Adobe Acrobat | Paid | No | No |
No software to install. Works in any browser. Results are instant.
Supports PDF files with embedded digital signatures. No file size limits for standard documents.
The validator checks the cryptographic signature chain, issuing CA, certificate expiry, and timestamp integrity in seconds.
See who signed the document, when, with which certificate, and whether any content was modified after signing.
Validates Swiss qualified electronic signatures per SR 943.03
Accepts EU-standard QES and AES signatures from all member states
Checks RFC 3161 timestamps so you know exactly when the document was signed
No. The validator is completely free and public. No registration, no login, no payment.
eIDAS (EU), ZertES (Switzerland), UAE Pass, and standard X.509 PDF signatures — including QES and AES levels.
No. Only the signature metadata (certificate, hash, timestamp) is processed. Your document content is never stored.
An invalid result means either the document was modified after signing, the certificate has expired, or the signature was applied with an untrusted CA. Contact the document sender for a fresh signed copy.
Yes — Swiss Trust Layer lets you seal any intellectual property with a court-proof timestamp in under 2 minutes. Backed by Swisscom Trust Services.
Upload the sealed PDF to Swiss Trust Layer Validator. The tool checks the cryptographic signature chain, ZertES/eIDAS certificate validity, and timestamp integrity in under 10 seconds — no account required.
Yes. The Swiss Trust Layer Document Validator is a permanently free public tool. It detects any modifications made after sealing by verifying the cryptographic hash. No signup, no payment.
The validator supports eIDAS QES and AdES (EU), ZertES (Switzerland), X.509 certificate-based signatures, PAdES PDF signatures, and CMS/PKCS#7 signatures.
Swiss Trust Layer gives you a court-proof, tamper-evident timestamp for any intellectual property — in under 2 minutes.