Verify Your Signature

Enter the SPHINCS+ public key, signed data, and signature below. You can paste text (up to 1KB) or upload files (up to 6MB for data, 100KB for signatures). The tool will automatically detect the variant based on the public key.

Public Key (hexadecimal):

Or upload public key file (max 1KB):

Signed Data (max 1KB if pasted):

Or upload data file (max 6MB, any type - images, PDFs, etc.):

Signature (hexadecimal):

Or upload signature file (max 100KB):

How to Use This Tool

Use Scenario: Bob wants to verify a document signed by Alice. He uses Alice's public key, the document, and the signature with this tool (validate SPHINCS+ signature). If the signature is valid, Bob can trust the document's authenticity.

Security Assurance

We never save your data - it is processed in memory only. For full details, see our Privacy Policy.