Free tools. No email address required.
Calculators and checkers that answer the question immediately, without a signup wall in front of the result. They run in your browser, so nothing you type reaches us.
No credit card to start · Cancel any time · Import your list in one click
Cost & planning
Work out what you should be paying before anyone tries to sell you a plan.
Deliverability
The technical layer that decides whether your email is treated as legitimate or as a forgery.
Campaign craft
Small checks that catch the mistakes nobody notices until after the send.
Why none of these ask for your email
The standard playbook for a free tool is to compute the answer, blur it, and ask for an email address before revealing it. It captures addresses in the short run and it produces a list of people who wanted a number and resent giving up their inbox to get it. Those addresses do not open anything, and eventually they complain — which is a deliverability problem you created for yourself.
There is also a simpler reason. Nobody links to a tool they had to register for. These pages exist partly to be useful and partly to be cited, and a signup wall prevents both.
If a tool here saves you an hour and you never sign up, that is a perfectly good outcome. If it makes you curious about what the paid product does, the features page is there, and the cost calculator will tell you honestly if switching would not save you anything.
Questions people ask before switching
Do I need a Bluey account to use these?
No. None of them ask for an email address, and none of them gate the result behind a signup. A tool that makes you register before it answers the question is a lead-capture form wearing a costume, and it earns neither links nor trust. If you find one of these useful and never sign up, that is a fine outcome.
Is my data sent to your servers?
No. The DNS generator and the subject line tester run entirely in your browser — you can verify that by opening your browser's network tab while you use them. The cost calculator does its arithmetic client-side too. Nothing you type is stored or transmitted.
Why is the cost calculator not comparing against a named competitor?
Because any number we asserted would be wrong for a large share of readers. Competitor pricing varies by plan, region, contract length and grandfathering, and plenty of people are on legacy plans that are far cheaper than anything published. Entering your own invoice gives you a figure you can actually trust. The reference estimate shown when you leave that field blank uses the same anchors published on our comparison pages, and is labelled as an estimate.
Why does the subject line tester not give a score?
Because a score would be invented. Open rates depend mostly on who is sending and whether the recipient trusts them — neither of which is visible in the subject text. So the tool reports what can genuinely be measured: length, where real clients truncate, emoji and punctuation counts, and specific flagged patterns, each with its reason attached.
Will you add more tools?
Yes. A DMARC record checker, an email ROI calculator and a signature generator are the next three. If there is something you would use, tell us — the useful ones tend to come from people describing a specific annoyance rather than from a keyword list.
Keep exploring
The tools are free. So is the trial.
Seven days of full access, no credit card. Import your list, publish the records these tools generate, and send a real campaign before you decide anything.