Apply for U.S. citizenship,free, efficient, easy.
Free software that walks you through Form N-400 step by step, then gets you ready for the interview.
sWhy ezgreen
Where an N-400 gets hard.
Every question explained in plain language
You know what a question is asking before you answer it.
Count every trip of 24 hours or more, wherever you went. A single trip over 6 months breaks continuous residence, and one over a year almost always does.
Interview and civics prep, built in
All 128 civics questions with scored mock tests, plus practice on the answers you gave.
Checks your answers against each other
Flags what you left blank and what contradicts an answer elsewhere.
- Still blankPart 8, a trip is missing its return date
- Two answers disagreePart 5, Item 3's count does not match your answers
- Everything else looks good.
Your data never leaves your device
Everything you enter stays on your own computer. Nothing goes to our servers.
How it works
From first question to interview day in four steps.
- 01
Answer the questions
Answer questions in plain English. ezgreen puts each answer where it belongs on Form N-400 and explains what the question is asking, in English and Chinese.
- Your basis comes first, so the form only asks for the years that apply to your case.
- You enter each trip, address, and job once. The form fills them in everywhere else it asks.
- Save and pick up where you left off. Your answers stay on your device.
- 02
Gather your documents
ezgreen builds the checklist from your own answers, so it lists only the evidence your basis and your history call for.
- Each item explains what it is and why USCIS asks for it.
- Mark off what you already have and see what is still missing.
- Extra evidence appears only when one of your answers calls for it.
- 03
Submit the way you prefer
Upload your completed form to your USCIS online account, use the answer sheet to type it in yourself, or print and mail a paper package.
- Export a completed, ready to upload PDF.
- Or work from an answer sheet, laid out in the order the online form asks.
- Or assemble a paper package, ordered the way USCIS expects to receive it.
- 04
Prepare for the interview
Once your case is filed, practice the civics test and the questions an officer will ask about your own answers.
- All 128 civics questions, with scored mock tests.
- Practice on the answers you gave. Those are what the officer goes through with you.
- Know what to bring and what happens on the day.
FAQ
Questions people ask before they file.
Is ezgreen really free for the N-400?
Why not just file on myUSCIS directly?
Do I qualify under the 3-year rule or the 5-year rule?
What happens at the interview and the civics test?
Is ezgreen a law firm?

Form N-400, Application for Naturalization
Ready to start your citizenship application?
Free to download and use, and your answers stay on your own computer. USCIS still charges its own filing fee.
