Tools I've built
Email and web tools. Built by me.
Practical tools built to answer the email, domain and web questions I get asked most often. They live on paulobrien.com, where you can try every one of them.
// members' tools
Sharing the tools I built, use and love.
These run on my servers, so you need a paulobrien.com membership to use them. Membership is free.
DNS checker
Check a domain's email and website records: SPF, DKIM, DMARC, MX, MTA-STS, blocklists and expiry.
Members onlyTry itMail tester
Send one email to a test address and get a spam score out of 10, with what to fix.
Members onlyTry itSpeed test
Load a page from 6 countries at once, or every country, and see what slows it down.
Members onlyTry itLink Inspector
Find broken links, missing pictures and redirect chains across a whole website.
Members onlyTry itSearch Inspector
Check a website the way Google reads it: titles, descriptions, headings, speed and what stops it being found.
Members onlyTry itDMARC report reader
Upload DMARC report files and see who sends email as your domain, and whether it passed.
Members onlyTry itWhois lookup
Look up a domain's registrar, expiry date, transfer lock, nameservers and owner.
Members onlyTry itIP checker
Find out who runs an IP address, whether it's a VPN and whether it's on an email blocklist.
Members onlyTry itTraceroute
Follow the route to a server, router by router, and see where it slows down or drops.
Members onlyTry itQR code checker
Check where a QR code or a link really goes, before you scan or click.
Members onlyTry itEmail move
Move every email and folder to a new provider. Free for members.
Members onlyTry it// open to everyone
No account needed.
These tools run entirely inside your browser, so anything you paste or type never leaves your computer.
Email header reader
Paste an email's technical details (headers) to check it's genuine, trace every server it passed through and spot why it was delayed.
Open to everyoneTry itEmail tracking checker
Paste an email and see every tracking pixel and tracked link, and who is behind them.
Open to everyoneTry itEmail provider finder
Answer six questions and get three providers that fit, with the reasons.
Open to everyoneTry itWho runs this email?
Type any email address or website domain and find out which company actually powers its email.
Open to everyoneTry itSwitch email provider
Select where you're moving from and to, and get tailored instructions for your mail, contacts and custom domain.
Open to everyoneTry itEmail cost calculator
See what your email will actually cost over time, with second-year price hikes factored in.
Open to everyoneTry itLeaving Gmail planner
Select the Google services you currently rely on to get a custom migration checklist.
Open to everyoneTry itGot an idea for a tool? Tell me about it
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