# Lacuna Demo Site > Try Lacuna's products hands-on, backed by the real APIs. Each demo below links to a Markdown version for AI coding agents: what it does, the calls it makes, integration patterns to copy, and its docs and sample code. Every demo runs at its page in English (`/en/…`) and Portuguese (`/pt/…`); put `.md` after a demo's page URL for its Markdown version. [demos.json](https://try.lacunasoftware.com/demos.json) lists the same demos as JSON. ## Signer - [Sign a document](https://try.lacunasoftware.com/en/signer/sign-a-document.md): Get a real document from Dropsigner by e-mail and sign it with a code sent by SMS. - [Sign without leaving your page](https://try.lacunasoftware.com/en/signer/embedded-signature.md): Sign on Dropsigner's signing page embedded in this page by the Signer widget, with no e-mail. ## Web PKI - [Your certificates in the browser](https://try.lacunasoftware.com/en/web-pki/certificates-in-the-browser.md): List the certificates on your computer with Web PKI and prove you hold a key, checked by Rest PKI Core. ## Amplia - [Issue an e-CNPJ certificate](https://try.lacunasoftware.com/en/amplia/issue-e-cnpj-certificate.md): Amplia issues a test e-CNPJ, with the key made on our server or in your browser. - [Issue an e-CPF certificate](https://try.lacunasoftware.com/en/amplia/issue-e-cpf-certificate.md): Amplia issues a test e-CPF, with the key made on Amplia's own issue page. - [Issue an e-CPF with your face](https://try.lacunasoftware.com/en/amplia/issue-an-ecpf-with-your-face.md): Prove who you are with your face, checked against the government's records, and get a test e-CPF, A1 or A3. - [Issue an SSL/TLS certificate](https://try.lacunasoftware.com/en/amplia/issue-ssl-tls-certificate.md): Issue an SSL/TLS certificate for a website with Amplia. ## PKI Suite - [Sign a file with your certificate](https://try.lacunasoftware.com/en/pki-suite/sign-a-file.md): Sign a PDF, an XML file or any other file with your own certificate, with PKI SDK and Web PKI. - [Sign a file with Rest PKI Core](https://try.lacunasoftware.com/en/pki-suite/sign-a-file-rest-pki-core.md): Sign a PDF, an XML file or any other file with your own certificate, with Rest PKI Core, Lacuna's cloud service, and Web PKI. - [Sign a PDF with your cloud certificate](https://try.lacunasoftware.com/en/pki-suite/sign-with-cloud-certificate.md): Sign a PDF with the cloud certificate your PSC keeps, reached through CloudHub, with PKI SDK on the server. - [Timestamp a PDF](https://try.lacunasoftware.com/en/pki-suite/timestamp-a-pdf.md): Add a timestamp to a PDF with Rest PKI Core, Lacuna's cloud service, proving it existed as it is at that moment. - [Validate a signed file](https://try.lacunasoftware.com/en/pki-suite/validate-a-signed-file.md): Validate every signature in a signed file, PAdES, CAdES, XAdES or XMLDSig, with PKI SDK on the server. - [Make a printer-friendly version](https://try.lacunasoftware.com/en/pki-suite/printer-friendly-version.md): Make a signed PDF's printer-friendly version, with a verification code that leads back to it, with PKI SDK on the server. ## Lacuna Bio - [Run a liveness check](https://try.lacunasoftware.com/en/lacuna-bio/run-a-liveness-check.md): Check that a live person is in front of the camera, with FaceTec 3D liveness on Rest PKI Core. - [Enroll and authenticate your face](https://try.lacunasoftware.com/en/lacuna-bio/enroll-and-authenticate-your-face.md): Enroll your face with your camera, then authenticate it one to one against that enrollment, with Rest PKI Core. ## Optional - [Lacuna documentation](https://docs.lacunasoftware.com/en-us): every product's docs, in English. - [PkiSuiteSamples](https://github.com/LacunaSoftware/PkiSuiteSamples): Lacuna's sample code. - [SignerSamples](https://github.com/LacunaSoftware/SignerSamples): Lacuna's sample code. - [RestBioSamples](https://github.com/LacunaSoftware/RestBioSamples): Lacuna's sample code.