Gas Checker

Gas Checker is a comprehensive Chrome extension designed for gas engineers, installers, and heating professionals in the UK & Ireland. It lets you generate digital documents—certificates, invoices, quotes, and job sheets—in PDF, automates reminders to boost repeat business, and goes paperless by syncing data to the web. It also integrates with QuickBooks and Xero to keep your accounts compliant with tax regulations.

With template certificates (Domestic Gas Safety Certificate, Gas Service/Maintenance Checklist, and more), easy data entry, and options to email or print, Gas Checker keeps every certificate and document organized. Link your accounts to stay MTD compliant, and never carry a paper certificate book again.