Free Email Tools

Remove Duplicate Emails

Remove duplicate email addresses from a list and keep the original order. Works with pasted text or files, entirely in your browser.

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Compare Two Email Lists

Compare two email lists and see which addresses are only in list A, only in list B, or in both. Private and fast.

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Merge Email Lists

Merge several email lists into one clean list and remove duplicates in the same step. Runs in your browser.

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Split Email List

Split a large email list into smaller files by addresses per file or number of parts, and download them as a ZIP.

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Sort Email List

Sort an email list A to Z, Z to A, by domain or by length, with an option to remove duplicates.

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Count Emails by Domain

Count how many email addresses belong to each domain (gmail.com, outlook.com and more) and download the table as CSV.

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Extract Emails from Text

Find and extract every email address from pasted text or a .txt, .csv or .html file. Remove duplicates and sort.

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Extract Emails from a CSV Column

Pull the email addresses out of one column of a CSV file. The column is found for you. Remove duplicates. Private.

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Filter Emails by Domain or TLD

Keep or remove email addresses by domain, ending (.com, .co.uk, .de) or country. Paste a list or open a file; private.

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Extract Gmail, Outlook, Yahoo Emails

Pick out the Gmail, Outlook/Hotmail, Yahoo and iCloud addresses from a list, or any of 50+ other mailbox providers.

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Separate Free vs Business Emails

Split an email list into personal mailbox addresses (Gmail, Outlook, Yahoo and more) and business or own-domain addresses.

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Email Provider Detector

Find out which mailbox provider each email address uses (Gmail, Outlook, Yahoo, iCloud, ISPs and more), with counts and CSV.

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Email Syntax Validator

Check a whole list of email addresses for valid syntax and see exactly why each invalid one fails. Private.

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Email Typo Fixer

Fix common email domain typos in a list, such as gmial.com to gmail.com or hotmail.con, and review every change.

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Disposable Email Detector

Find disposable (throw-away) email addresses using an open-source blocklist of about 9,000 domains. Private.

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Role-Based Email Detector

Find role-based addresses such as info@, sales@, support@ and admin@ in a list and separate them from personal ones.

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Clean Email List

Clean a list in one step: trim, lower-case, fix typos, remove invalid, duplicate, role-based and disposable addresses.

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Email Parts Splitter

Split email addresses into username, domain, TLD and a best-guess first and last name as a table. Copy or download.

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Email List Converter

Convert an email list between TXT, CSV and Excel (.xlsx) in your browser. Keep the email column or the whole table.

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Email Header Analyzer

Paste raw email headers to see the route between servers, delays, SPF, DKIM and DMARC results and signs of spoofing.

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Email Structure Analyzer

Break an email address into its parts and check it against every format rule, with provider, role and typo hints.

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DMARC Record Generator

Build a DMARC DNS record: policy, report addresses, alignment and percentage, with the exact TXT name and value.

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BIMI Record Helper

Build a BIMI DNS record for your brand logo and check your SVG against the BIMI rules and requirements.

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Mailto Link Generator

Create a mailto link with recipients, CC, BCC, subject and pre-filled message, correctly encoded, and test it in one click.

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Email Address Obfuscator

Hide an email address on your web page from spam bots with character codes, [at] text, reversed CSS or JavaScript.

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Email Subject Line Checker

Count the characters in your subject line and preview the cut-off on phones, Gmail and Outlook. Checks caps and spam words.

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HTML Email Previewer

Edit and preview HTML email code live at desktop and phone widths, block images, try dark mode and get email warnings.

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Spam Word Checker

Check your email text for words and habits that spam filters dislike, with highlighted trigger words and a rough risk score.

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MX Lookup

Look up the MX (mail server) records of any domain: priorities, servers, IP addresses and the provider that runs the mail.

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Email Provider by MX

Find out which service runs the email for a list of domains from their MX records: Google Workspace, Microsoft 365 and more.

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SPF Record Generator

Build an SPF DNS record for your domain from your mail servers, IPs and services, with a live count of the 10 allowed lookups.

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DKIM Record Checker

Look up and check a DKIM record by domain and selector: key size, testing flag, revoked keys and syntax. Or try common selectors.

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