United States · USCIS
Form N-400 — Application for Naturalization
Form N-400 is the application to become a U.S. citizen for eligible lawful permanent residents.
Fill N-400 now — free to try
Filled entirely on your computer. Your SSN and personal details are never uploaded.
Who needs N-400?
Green-card holders who meet the residence and eligibility requirements for U.S. citizenship.
How to fill it with DocsArc
- Open N-400 in the DocsArc workspace with one click above.
- Click any field and type — form fields are detected automatically, and you can add text anywhere.
- Sign it if needed: draw, type or upload your signature, with an automatic date line.
- Save or print. The finished PDF never left your computer.
Frequently asked questions
How long is the N-400?
Around 14 sections covering residence, employment, travel and moral character — filling it digitally avoids restarts on paper.
Always verify you have the current version: official USCIS page
This U.S. federal form is in the public domain. DocsArc is an independent tool and is not affiliated with USCIS.