A small set of practical tools for people who run websites or send cold and marketing email. Every one is free, with no account, no signup, and no email wall — open it, run it, read the result. Most run entirely in your browser, so nothing you type leaves your machine; the broken-site checker is the one exception, because a browser is not allowed to probe another domain's SSL certificate or status code, so that single scan runs on our server and returns a plain-English report.
Bookmark this page or link to it — each tool below is a standalone resource you can hand to a client, a teammate, or a stranger on a forum without asking them to register first.
Enter any domain and get an instant read on whether the site is down, missing HTTPS, slow to load, or serving an expired SSL certificate — the four failures that quietly cost a business every visitor. It is handy before you pitch a prospect on a redesign, when you hand off or inherit a client site, or to confirm your own certificate did not lapse over the weekend. The check runs server-side and explains, in plain language, what is wrong and what to fix.
Paste a marketing or cold email and it checks the message against the seven things US CAN-SPAM law actually requires: a real physical postal address, a working one-click opt-out, honest From and Reply-To headers, and a subject line that matches the body. It runs entirely in your browser, so nothing you paste is uploaded — a fast compliance sanity check before a send. It is a practical aid, not legal advice.
Filters score a message before any human sees it. This scans your subject line and body for the spam-trigger words, ALL-CAPS shouting, punctuation abuse, and link-to-text ratios that get an otherwise good email routed to spam. It is the deliverability-hygiene companion to the CAN-SPAM checker above — one keeps you legal, this one keeps you in the inbox — and it also runs in your browser.
Before you pay for a lead list or a recurring intent feed, do the napkin math. Enter your list size, reply rate, close rate, average deal value, and the cost of the list, and it returns the expected customers, revenue, payback period, ROI, and cost per customer. It is an honest way to decide whether a paid list pays for itself for your numbers — everything stays in your browser.
People announce that they are ready to buy in plain English on Reddit and in forums: alternative to X, best tool for Y, anyone recommend. Type your product or a competitor and this gives you the exact high-intent phrases buyers use, plus one-click Reddit and Google search links to find the threads where they are asking right now. It is a free, no-login way to find prospects who have already raised their hand.
There is no signup and no email capture on any of these tools because gating a checker behind a form defeats the point of a checker. You can use them as often as you like for your own sites and campaigns or for clients you work with. The two email tools and the two calculators run client-side, so the text and numbers you enter never reach a server; the broken-site checker is server-side only because the same-origin policy blocks a browser from reading another domain's certificate or response code.
Want to understand how the scoring and checks are derived? Read the methodology behind these tools — what each check looks for, why, and where the thresholds come from.
If you would rather not run the checks by hand for a steady stream of prospects, Hailports also offers a paid $99/mo Intent Lead Finder that surfaces people who publicly posted that they are shopping or switching this week. The tools above stay free and unrestricted either way.