Free tools. No account.
Useful whether or not you ever become a customer. That is the point.
Three tools, nothing to install
Verify a receipt
Paste a receipt and see the full signature chain, claims, revocation and a verdict. Runs in your browser; zero network calls if you paste the keys. Open → · signature demo
API playground
Send real statements to the issuer and watch hidden fields and look-alike payees get refused. Open →
On-device document scanner
Camera capture, edge detection and PDF export — entirely in the browser, nothing uploaded. Open →
The document scanner is here for a reason beyond being useful: it is what on-device-only processing actually looks like when nobody is asking you to trust a server.