Engineering tools

Engineeringtools,freeforever.

We've always shipped free utilities alongside commercial products. These are the current ones — small, sharp, maintained.

Free

NF-e Reader

Paste or upload an NF-e XML and view issuer, recipient, items and totals in readable format. Download as PDF.

Open reader
Coming soon

DNS Checker

Validate DNS propagation across 40+ global resolvers in one click.

Coming soon

SSL Inspector

Deep certificate analysis: chain, expiry, cipher suite, HSTS.

Coming soon

Headers Analyser

HTTP response header audit with security score and recommendations.

Coming soon

Uptime Monitor

Public uptime monitoring, 60-second checks, status page included.