EIN formatter & validator
Format any US Employer Identification Number as XX-XXXXXXX and check if it is structurally valid. Bulk format a list too.
Files are processed in your browser and never uploaded.
How to use EIN formatter & validator
Add your text
Type or paste your text into the input box. Everything is handled by your own browser, so nothing is sent to a server.
Set the options
Choose Xx-xxxxxxx. The options are visible from the start, not hidden until you paste something.
Read it and keep a copy
The output updates as you type, so there is nothing to submit and nothing to wait for. Copy formatted EIN puts the result on your clipboard.
What this tool does
Formats an EIN as XX-XXXXXXX
Type or paste the digits in any arrangement and they come back in the standard two-then-seven form, ready to copy.
Format a whole list at once
Paste a column of numbers into the bulk box and Format all rewrites every one of them, which is the quicker way through a spreadsheet export.
Runs fully in your browser with no upload and no sign-up
The check is structural: nine digits with a valid prefix. It confirms the number is well formed, not that the IRS has issued it. Nothing is uploaded.
Frequently asked questions
What is an EIN?
An Employer Identification Number (EIN), also called a Federal Tax Identification Number, is a 9-digit number assigned by the IRS to identify a US business entity for tax purposes. Every corporation, partnership, LLC, non-profit, trust and estate that files federal taxes needs one. Sole proprietors without employees may use their Social Security Number instead, but an EIN is recommended for privacy.
What does the prefix tell you?
The first two digits (the EIN prefix) historically identified which IRS campus processed the application. Since 2001 the IRS also issues EINs online, so the geographic meaning is less reliable - but the prefix still indicates the general era and method of assignment.
Is this the same as a tax ID?
EIN, Federal Tax ID, Federal Employer Identification Number (FEIN), and Tax Identification Number (TIN) are often used interchangeably for businesses. Technically TIN is the broader category that includes Social Security Numbers for individuals.
Can I verify an EIN here?
No - this tool checks structure only (9 digits, valid prefix). To officially verify an EIN is registered and active, you need to contact the IRS or use the IRS Business Master File. Nothing is uploaded from this tool.
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