Forms › Form N-400
Fill out Form N-400 online
Fill out Form N-400, the Application for Naturalization, free in your browser. The official USCIS form opens here, you click the highlighted fields and type your answers, then download the completed PDF. The State and height boxes are dropdown lists that don't open here, so type those answers on top of them. Nothing is uploaded to any server. No signup, no watermark.
Editing is free. Downloading your finished file is a one-time $1.97 per document, refundable for 7 days.
What is the Form N-400?
Form N-400 is the U.S. Citizenship and Immigration Services (USCIS) application used by lawful permanent residents (green card holders) to apply to become naturalized U.S. citizens.
Fill the Form N-400 in 3 steps
Get the form
Click “Get form” — the official PDF opens in the editor, with no upload.
Fill it in
Click the highlighted fields and type your details, or add text anywhere on the page. Everything stays on your device.
Download
Save the completed form to your device.
Common questions
Who files Form N-400?
Lawful permanent residents (green card holders) who want to become U.S. citizens file Form N-400 with USCIS. Applicants must meet eligibility requirements such as a qualifying period of permanent residence; check USCIS guidance for the rules that apply to your situation.
Is filling out the Form N-400 here free?
Filling it in is free, with no signup and no watermark. Downloading the completed form is a one-time $1.97 — not a subscription, and refundable for 7 days.
Do you upload my form to a server?
No. The form opens and is filled entirely in your browser. Nothing is uploaded, so your personal and financial details stay on your device.
Is this the official form?
Yes. This is the official, current Form N-400 published by the U.S. government, which is public domain. You fill the genuine document.
Related forms
Form I-130
Form I-130, Petition for Alien Relative, is filed with USCIS by a U.S. citizen or lawful permanent resident to establish a qualifying family relationship with a relative who wants to immigrate. It is the first step in helping that relative get a Green Card.
Form I-485
Form I-485 is filed with U.S. Citizenship and Immigration Services (USCIS) by a person already in the United States who is applying to become a lawful permanent resident (green card holder) without leaving the country.
Form I-765
Form I-765 is the USCIS Application for Employment Authorization. Noncitizens who are eligible to work in the United States file it to request an Employment Authorization Document (EAD), the card that proves their right to work.