Free tools

Free GTM, Lead Generation & Email Deliverability Tools

26 working tools we use in real client builds DNS and deliverability checkers, cold email analyzers, lead list utilities, and outbound calculators. No signup, no email gate.

Lead Generation · 6

Lead List Checker

Paste your lead list (one email per line, or CSV) and get an instant quality report. The checker flags invalid syntax, duplicates, disposable free-mail domains, and role-based addresses like info@ that kill reply rates then scores the list out of 100.

CSV Lead Cleaner

Paste raw CSV or a column of emails and get back a cleaned list: trimmed, lowercased emails, invalid rows removed, duplicates stripped. The cleaned output appears in a box you can copy straight into Clay, Apollo, or your sending tool.

Duplicate Lead Checker

Duplicate contacts waste sending volume and make prospects receive the same cold email twice a fast route to spam complaints. Paste your list and this checker shows every repeated email and how many times it appears.

Email List Validator

Paste your list and get two layers of validation: RFC-style syntax per email, plus a live DNS lookup confirming each domain actually accepts mail (MX records). Domains with no MX records are near-certain hard bounces.

ICP Builder

A vague ICP is why most outbound fails. Fill in six fields industry, company size, geography, buyer title, pain point, and trigger event and get a structured ICP statement plus ready-made search filters for list building.

Lead List Cost Calculator

Most teams overpay for lead data because they compare sticker prices instead of cost per verified contact. Enter your list size and source costs to see the true per-lead number and what a waterfall-enriched build would save.

Cold Email · 5

Cold Email Spam Checker

Spam filters score content, not just infrastructure. Paste your email and this checker scans for 100+ known trigger phrases, link density, image/text balance signals, caps abuse, and exclamation marks then gives you a spam score and the exact lines to rewrite.

Cold Email Copy Checker

Good cold emails are short, specific, and ask for one thing. Paste your copy and get a structural audit: word count vs best-practice range, personalization tokens, CTA count, question usage, and a readability estimate.

Subject Line Checker

The subject line decides whether the email gets opened. Check yours for length (mobile cuts off around 40 characters), spam triggers, clickbait patterns, and personalization then get a score with specific fixes.

Email Personalization Checker

{{firstName}} is not personalization it's mail merge. This checker measures real personalization depth: token usage, spintax for variation, references to triggers (funding, hiring, launches), and flags generic filler phrases that read as bulk mail.

Cold Email Length Checker

Length is a conversion variable: under 50 words can feel low-effort, over 150 gets archived. This checker reports word count, sentence count, average sentence length, and estimated reading time benchmarked against first-touch best practice.

Email Deliverability · 10

DNS Checker

Enter a domain to pull its live DNS records: A and AAAA (where it points), MX (where mail goes), TXT (SPF, DKIM keys, verifications), and NS (who hosts the DNS). Results come from a public resolver in real time.

SPF Checker

SPF tells receiving servers which senders may use your domain. Enter a domain to fetch its SPF record, verify there's exactly one, estimate its DNS lookup count, and check whether the all-mechanism policy (-all, ~all, +all) is safe.

SPF Generator

Build a valid SPF record without memorizing syntax. Add your sending services as includes, any dedicated IPs, pick an enforcement policy, and copy the generated record straight into your DNS as a TXT entry.

DKIM Checker

DKIM signs your mail cryptographically so receivers can verify it came from you. Enter your domain and selector (check your ESP's docs Google Workspace uses 'google') to verify the public key is published correctly at selector._domainkey.yourdomain.

DMARC Checker

DMARC ties SPF and DKIM together and tells receivers what to do with failures. Enter a domain to read its _dmarc record, grade the policy strength, and confirm reporting (rua) is configured so you actually see who's sending as you.

MX Checker

MX records tell the world where to deliver your mail and tell you whether a lead's domain can even receive email. Enter a domain to list its mail servers, priorities, and identify the provider (Google, Microsoft, and others).

Blacklist Checker

Domain blacklists kill deliverability overnight. This checker queries the Spamhaus Domain Blocklist (DBL) live the list major mailbox providers consult. A listing here means your links and domain are being blocked across the ecosystem.

Domain Health Checker

One scan for the complete picture: can the domain receive mail (MX), who's allowed to send (SPF), is mail signed (DKIM across common selectors), what happens to failures (DMARC), and is the domain blacklisted. You get a health score out of 100 and a prioritized fix list.

Email Deliverability Checker

Before you scale volume, confirm the foundations. This checker audits the deliverability stack for a sending domain authentication records, mail routing, blacklist status and tells you whether the domain is ready for cold outreach or what to fix first.

Domain Expiry Checker

An expired sending domain silently kills a live campaign and expired domains get snapped up. Enter a domain to see its registrar, registration date, and expiry date pulled from public RDAP registration data.