Business Email Filter

The Business Email Filter takes any list or block of text containing email addresses and strips out the free consumer providers, leaving you with only business and organisational addresses. It recognises the major webmail domains such as Gmail, Yahoo, Outlook, Hotmail, iCloud, AOL, and Proton, and removes them so what remains is the set of addresses tied to companies, institutions, and custom domains.

It is built for B2B marketers, sales teams, and lead researchers who care about reaching decision-makers at organisations rather than personal inboxes. Business addresses generally indicate a professional context, better data quality, and higher intent, so filtering out free providers helps you focus outreach, improve segment accuracy, and estimate how much of a raw list is genuinely business-grade.

Everything runs locally in your browser using JavaScript, so nothing you paste is uploaded or stored. Paste your content, choose whether to invert the filter to keep personal addresses instead, toggle deduplication, lowercasing, and sorting, then click Filter to build the result along with a statistics panel that reports how many addresses were kept, removed, and deduplicated.

Features

• Removes free consumer providers like Gmail, Yahoo, Outlook, Hotmail, iCloud, AOL, and Proton.
• Keeps only business and organisational addresses tied to companies and custom domains.
• Offers an invert option that flips the filter to keep personal addresses and drop business ones.
• Ignores names, punctuation, and markup so you can paste raw exports and copied content directly.
• Removes duplicates case-insensitively so each address appears only once in the result.
• Lowercases addresses for consistency and offers optional alphabetical sorting for readability.
• Shows a stats panel counting emails scanned, business kept, personal removed, and duplicates.

How to use Business Email Filter

1. Paste your list or any text containing email addresses into the input box.
2. Leave the invert option off to keep business addresses, or enable it to keep personal ones.
3. Toggle Remove duplicates, Lowercase, and Sort A to Z to control how tidy the output is.
4. Click the Filter emails button to scan the content and build the filtered list.
5. Read the statistics panel to see how many addresses were kept and how many were removed.
6. Copy the finished list or export it as a TXT or CSV file for later use.

Benefits

• Focuses B2B outreach on organisational inboxes by removing free consumer addresses quickly.
• Improves segment accuracy so campaigns reach decision-makers rather than personal accounts.
• Saves time versus manually checking each address against a list of free providers by hand.
• Doubles as a personal-only filter thanks to the invert option, covering both use cases.
• Processes sensitive lists privately since nothing you paste is ever sent to a server.
• Gives transparent counts so you can quantify how business-grade a collected source really is.

The distinction between business and personal addresses relies on a known list of free consumer providers. Anything on those domains is treated as personal, and everything else is treated as business, which works well in the vast majority of cases. Occasionally an individual may use an unusual personal domain that will be classed as business, so treat the split as a strong heuristic rather than a guarantee, especially with international or niche providers.

The invert option makes this a two-in-one tool: leave it off to build a clean B2B list, or turn it on to isolate personal consumer addresses instead, which pairs neatly with the dedicated Personal Email Filter. As with all format-based tools, it confirms provider membership and a valid pattern rather than mailbox deliverability, so combine it with the Email List Cleaner before sending. All processing stays local to your browser.