Security

Last updated: 5 October 2026

Security is built into how InvoiceSeb works.

Data stays on your device

Invoices, clients, expenses, logos and signatures are processed in your browser and stored in local storage. We do not operate a database of your documents, so there is no central store to breach.

Secure delivery

The Service is served over HTTPS. It requires no passwords. Third-party requests are limited to exchange-rate providers and our hosting provider.

Protect your own data

• Use Backup in Reports to keep a copy of your data.
• Use a device lock and keep your browser up to date.
• Treat share links as confidential: anyone with the link can read the invoice it contains.

Report a vulnerability

Email invoiceseb@gmail.com with details. Please give us reasonable time to fix an issue before disclosing it publicly. Our contact details are also published in security.txt.