Available
TOOLS-02
Email header analyzer
Explain delivery hops and summarize SPF, DKIM and DMARC evidence without claiming absolute authenticity.
No input upload
Open tool Processed in your browser
Privacy-first email tools
Focused utilities for inspecting email security and protecting test accounts. Every tool is built by Once Email and processes your input in this browser.
Available
TOOLS-03
Email link and tracker checker
Inspect pasted email HTML for risky links, hidden images and remote tracking clues without rendering it.
No input upload
Open toolAvailable
TOOLS-04
Secure password generator
Create strong passwords and passphrases locally using the browser cryptography API.
No input upload
Open toolLocal by design
Input is handled only after you choose to run a tool. It is not placed in URLs, logs, analytics, storage or server requests.
Released only after verification
A tool becomes public only after security, accessibility, mobile, Top 10 language and no-network-leakage tests pass.
First tool collection released
All three tools have passed security, mobile, Top 10 language and production checks. Work areas remain advertising-free and process input locally.