Free Email and B2B Data Tools
Free tools for sales and marketing teams, with no signup and nothing to install. Most run in your browser. The ones that make a live DNS or SMTP lookup give you 25 checks a day per IP.
- Email Format Finderdomainranked address patterns
- Data Quality Score CalculatorCRM size + ratesquality score
- CRM Cleanup ROI CalculatorCRM size + deal valuecost of bad data
- Email Syntax ValidatoremailRFC 5322 check
- TAM Calculatorindustry, geo, size, ACVTAM estimate
- Free Email Verifieremailverdict + score
- Free Domain ValidatordomainNS, MX, SPF, DMARC
- Free Reverse Email Lookupemailperson, company, profile
- B2B Contact Findername + domainlikely address + pattern
- Phone Validatorphone numberE.164 + checks
- ICP Fit Score Calculatoraccount answersfit score
- Email Permutatorname + domainevery likely address
- Cold Email Spam Checkeremail copyspam-word report
- Free Email Blacklist Checkerdomain, email or IPblocklist status
- MX Lookup TooldomainMX records
- AI Cold Email Generatorrecipient + youdraft variants
- Email Signature Generatoryour detailssignature HTML
- LinkedIn Email Finderprofile URLlikely work email
- Email ExtractorURL or textevery email on it
- Email List Cleanerpasted list or CSVdeduped, checked list
The list below narrows as you type. Arrow keys move the highlight and Enter opens the highlighted tool.
20 tools, from an MX lookup to a CRM cleanup ROI model2 seconds for a typical live checkNo signup and nothing to install
10,000+ users, from founders to full sales teams
- Switched from
ZoomInfo - Case study
HackerOneSwitched from
Apollo- Switched from
Clay - Case study
Sumo LogicSwitched fromClay- Switched fromApollo
- Case study
- Switched fromZoomInfo
- Switched fromZoomInfo
G2
Chrome Web Store
AppSumo
Start from what you already have
Each tool takes one thing you already have and gives back one answer. Pick the row that matches what is in front of you (an address, a name, a list, a domain, a draft, a phone number) or the number you need for a business case.
You have an email address and want to know who is behind it
Free Reverse Email Lookup and Email Extractor.
Start from the address and work back to the person, the company and the public profile.
You have a name and a company but not the address
Email Format Finder, Email Permutator, LinkedIn Email Finder and B2B Contact Finder.
Work out the pattern the company uses, build the likely addresses, then check them before you send.
You already have the addresses and need to know which ones will bounce
Free Email Verifier, Email Syntax Validator and Email List Cleaner.
Check the syntax first (instant, runs in your browser), then the live lookup, then the whole list at once.
You want to know whether the mail will land
MX Lookup Tool, Free Domain Validator, Free Email Blacklist Checker and Cold Email Spam Checker.
Whether mail lands depends on the sending domain and the message. Check both before you scale volume.
You have the address and still have to write the email
AI Cold Email Generator and Email Signature Generator.
Draft variants to react to, and a signature block that renders the same in Gmail and Outlook.
You have a phone number
Normalize it to E.164 and check it against its country's numbering plan before a rep calls it.
You need a number, for a plan or for a business case
TAM Calculator, ICP Fit Score Calculator, Data Quality Score Calculator and CRM Cleanup ROI Calculator.
Size the market, score the fit, grade the data you already hold, and price what cleaning it is worth.
OmniEvery tool, free to run
Validators check that something is real. Analyzers find or read what is already public. Calculators put a number on your data. Each runs in the browser or against a live lookup, and answers in seconds.
Email Format Finder
Use this free email format finder to discover the most common email patterns at any company. Enter a domain to see formats like first.last@, flast@, firstl@, and 30+ other variations, ranked by likelihood.domainranked address patternsRuns in your browserAnalyzerUnlimitedData Quality Score Calculator
Score your CRM data quality based on key metrics. Input your bounce rate, duplicate rate, and data age to get an instant health grade.CRM size + ratesquality scoreRuns in your browserCalculatorUnlimitedCRM Cleanup ROI Calculator
Calculate how much bad CRM data is costing your business. See the ROI of cleaning and enriching your database.CRM size + deal valuecost of bad dataRuns in your browserCalculatorUnlimitedEmail Syntax Validator
Check if an email address has valid syntax. Instantly detect formatting errors, invalid characters, and common typos.emailRFC 5322 checkRuns in your browserValidatorUnlimitedTAM Calculator
Estimate your Total Addressable Market by industry, geography, and company size. See how many decision makers Cleanlist AI can reach.industry, geo, size, ACVTAM estimateRuns in your browserCalculatorUnlimitedFree Email Verifier
Check if an email address is valid in about two seconds. Cleanlist AI validates RFC 5322 syntax, looks up DNS and MX records, and flags disposable and role-based addresses. 25 free a day, no signup.emailverdict + scoreLive lookupValidator25 / dayFree Domain Validator
Live MX, SPF, DMARC and NS lookups for any domain. Find the setup problem before your first send.domainNS, MX, SPF, DMARCLive lookupValidator25 / dayFree Reverse Email Lookup
To find out who owns an email address, paste it above and Cleanlist AI runs four public-source checks in one pass: whether the domain accepts mail, which company owns that domain, any public Gravatar profile tied to the address, and the name encoded in the address itself. This free reverse email lookup works best on business addresses, runs with no sign up, and allows 25 lookups per IP per day.emailperson, company, profileLive lookupAnalyzer25 / dayB2B Contact Finder
Find business contacts by company domain. Get predicted email formats, company intelligence, and enrichment previews, free.name + domainlikely address + patternRuns in your browserAnalyzerUnlimitedPhone Validator
A phone validator checks whether a number could be real before anyone calls it. Paste any phone number and this free tool normalizes it to E.164, identifies the country and numbering plan, rejects it if the length or prefix is impossible, and flags toll-free and known VoIP ranges. It runs in your browser, with no signup and no daily limit.phone numberE.164 + checksRuns in your browserValidatorUnlimitedICP Fit Score Calculator
Score any account against your Ideal Customer Profile in 60 seconds. Answer 8 questions about firmographics, technographics, and behavior, get a 0-100 fit score with reasoning.account answersfit scoreRuns in your browserCalculatorUnlimitedEmail Permutator
An email permutator turns a person's name and their company domain into every likely address at once. Enter Jane Doe and acme.com and you get jane.doe@acme.com, jdoe@acme.com, jane@acme.com, doej@acme.com and roughly twenty more, ready to copy. It runs in your browser with no signup. Usually only one permutation is a live mailbox, so verify before you send.name + domainevery likely addressRuns in your browserAnalyzerUnlimitedCold Email Spam Checker
Test your cold email before you send it. Paste your subject and body to get an instant deliverability score, flagged spam-trigger words, and specific fixes to stay out of the spam folder.email copyspam-word reportRuns in your browserAnalyzerUnlimitedFree Email Blacklist Checker
Check whether your domain or sending IP is on a known email blacklist. Tests against 9 major DNS blocklists (Spamhaus, SpamCop, Barracuda, and more) in seconds, with plain-English results.domain, email or IPblocklist statusLive lookupValidator25 / dayMX Lookup Tool
An MX lookup shows which mail servers receive email for a domain. Enter a domain or an email address and this free tool returns the MX records ranked by priority, names the provider behind them (Google Workspace, Microsoft 365, Zoho, Proofpoint and more), and checks whether an SPF record exists. 25 lookups per IP per day, no signup.domainMX recordsLive lookupAnalyzer25 / dayAI Cold Email Generator
Free AI cold email generator. Enter who you are reaching, your offer, a tone, and a goal, and get three ready-to-send cold email variants (each with a subject line) built on proven frameworks: AIDA, Problem-Agitate-Solve, and a short pattern interrupt.recipient + youdraft variantsRuns in your browserAnalyzerUnlimitedEmail Signature Generator
Free email signature generator. Fill in your details, pick a clean template, choose an accent color, and copy a professional HTML signature that pastes straight into Gmail, Outlook, and Apple Mail.your detailssignature HTMLRuns in your browserAnalyzerUnlimitedLinkedIn Email Finder
Paste a LinkedIn profile URL and this free tool reads the person's name from it, generates the work email formats their company most commonly uses, ranks them by confidence, and checks that the domain has live mail servers. LinkedIn does not publish member email addresses, so what comes back is a ranked set of candidates rather than one confirmed address.profile URLlikely work emailLive lookupAnalyzer25 / dayEmail Extractor
Enter a website URL and this free email extractor fetches the page, pulls every email address out of the HTML, removes duplicates, and hands you a list you can copy or download as a CSV. Paste raw text or HTML instead and the same scan runs entirely in your browser. No signup, no extension.URL or textevery email on itLive lookupAnalyzer100 site scans / dayEmail List Cleaner
Paste a list of email addresses or drop in a CSV and this free email list cleaner removes duplicates, flags invalid syntax, separates role-based and free-consumer addresses, catches typo domains like gmial.com, and spots disposable inboxes. It runs entirely in your browser, so nothing you upload leaves your machine.pasted list or CSVdeduped, checked listRuns in your browserValidatorUnlimited
From free to $49 a seat
The tools are free. The trial is 14 days of Pro, free. Each step below, from a one-off lookup to a full workload, comes with its number.
- You are here25 a dayPer IP, per tool, on the 6 tools that make a live DNS or SMTP lookup. The email extractor gets 100 site scans a day, and the other 13 run in your browser with no cap.
- 50 creditsA month on the $0 Free plan after the trial, for up to 3 seats. Search costs no credits on any plan.
- 14 daysOf Pro, free, for every new workspace: 250 credits, 3 seats, agents, Sequences and Clu in Slack. Every Pro feature is on.
- $49Per seat a month for Starter when the trial ends, or 25% less billed annually. Every seat adds its credits to one shared wallet.
Do the same jobs on a whole list
Describe your buyer in one sentence and Clu runs the search, enriches the list, validates it and gets it ready for your CRM in under five minutes. It uses the same data as these tools, with no 25-a-day cap, plus bulk verification and two-way CRM sync.
98% verified work emails and 85% phone numbers on our 500-lead benchmark, across 25+ providers.
A demo of Clu, the Cleanlist AI agent, doing this for a whole list. Asked: Find Heads of Data or Analytics, 2-5 years in the role, at Series C+ software companies with 201-1,000 people that raised in the last 12 months. US or Canada. Skip HubSpot customers. Verify their emails. Clu runs the tools, asks for confirmation before spending credits (Find work emails for 25 leads on Data leaders, Series C+, 25 credits), fills the list row by row and reports: 25 leads, 24 verified emails. One is a catch-all, so I marked it risky.
Run the whole list with Clu.
Tell Clu who you sell to. It finds the buyers, verifies every email and phone number across 25+ providers, and scores each lead against your ICP.
14 days of Pro, free.