Free Resources

Everything You Need to Pass

Every free tool on N400Test.com in one place. No account required, no paywalls. Click anything below to jump straight in.

Practice & Study Tools

Practice Tool

Simulate the USCIS civics interview with 20 random questions. Answer 12 out of 20 correctly to pass, just like the real test.

Practice Tool

Study all 128 official civics questions organized by theme. Filter by topic and review every answer at your own pace.

Practice Tool

Drill every word on the official USCIS reading vocabulary list with sentence-level practice. Build confidence before your interview.

Practice Tool

Practice spelling and writing sentences from the official USCIS writing vocabulary list with instant feedback.

Practice Tool

A full walkthrough of what happens at your naturalization interview: what to bring, what to say, and what comes next.

Practice Tool

Everything you need to know about the English language requirement: speaking, reading, writing, vocabulary lists, and exemptions.

Background Knowledge

Reference Guide

An interactive timeline of American history, founding documents, and key citizenship facts, all drawn from the civics test topics.

Reference Guide

Step-by-step guide through the entire N-400 process: eligibility, application, biometrics, interview, and the oath ceremony.

Reference Guide

The full text of the U.S. Oath of Allegiance with a clause-by-clause explanation, religious accommodations, and ceremony details.

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