Free Privacy Tools
Small, fast, privacy-first tools that run entirely in your browser — nothing is sent to a server. Free, no signup, in the same spirit as our disposable email service.
Password Generator
Create strong, random passwords with adjustable length and character sets. Generated locally with the Web Crypto API — never transmitted.
Open tool →Disposable Email Domain Checker
Check whether an email or domain is a known disposable / temporary provider — single or in bulk. Matches against thousands of known domains, entirely in your browser.
Open tool →Email Header Analyzer
Paste raw email headers to trace the delivery path hop-by-hop, time each step, and check SPF, DKIM and DMARC results — entirely in your browser.
Open tool →Why browser-based tools?
A password you generate should never travel across the internet to be created. Our tools run 100% client-side, so sensitive output stays on your device — the same privacy-first principle behind our disposable email. Pair a strong password with a throwaway inbox for the safest possible throwaway signup.
Privacy by design, not by promise
Most "free online tools" quietly send your input to a server to process it — which means trusting that the operator doesn't log, store, or leak it. We take a different approach: every tool here does its work entirely in your browser using native web APIs. There is no form submission, no server round-trip, and nothing for us to retain. When you close the tab, the result is gone. You don't have to take our word for it — open your browser's network tab and watch: nothing leaves your device.
Built for the privacy-conscious
These tools exist because the people who use disposable email tend to care about the same things everywhere: keeping personal data off servers they don't control, avoiding accounts they don't need, and reducing their digital footprint. A throwaway inbox keeps your real address private during signups; a locally-generated password keeps your credentials strong without a third party ever seeing them. Used together, they cover two of the most common ways accounts get compromised — reused passwords and exposed email addresses.
What's here, and what's coming
Right now you'll find a password generator with adjustable length, character sets, and a live strength meter, a disposable email domain checker that flags whether an address comes from a known throwaway provider, and an email header analyzer that traces an email's delivery path and checks its SPF, DKIM and DMARC results — all useful when you want to keep signups clean and verify where mail really came from. We're expanding the toolkit with more small, fast, single-purpose utilities — each free, each requiring no signup, and each running locally in your browser. If there's a privacy or email tool you'd find useful, let us know at support@mailboxtemp.com.