Proofreading tool

Capitalization Checker for Writing

Review common capitalization mistakes in essays and assignments, with line references that make each possible error quick to locate.

Paste or type your text

Results update automatically.

Processed on this device
0 words0 characters
ResultsReady
Aa

Your results appear here

Start typing or use the example.

What this tool checks

A focused signal for your next edit.

Capitalization errors are small, visible signals that can make a finished draft look unpolished. This checker isolates a few high-confidence patterns so you can review them without changing the text automatically.

01

Sentence-start capitalization

02

Lowercase pronoun I

03

Days and months

Practical uses

Use the result as a review list.

  1. Check text drafted quickly on a phone or in a chat window.
  2. Review notes converted into full sentences.
  3. Catch lowercase sentence openings after rearranging paragraphs.

Questions

Before you use the result.

What capitalization errors does the tool check?

It looks for lowercase sentence starts, lowercase standalone i, and lowercase English names for days and months.

Does it automatically change my writing?

No. It reports possible issues so you can decide whether each word should be changed.

Can it check title capitalization?

Use the Text Case Converter for a quick title-case conversion. Always compare the result with the style guide required for your assignment.

Need AI detection too?

Check text, images, and audio in the mobile app.

Use these free browser tools for mechanical review, then use Stealth AI Detector when you need AI and human probability signals.

Download on the App StoreGet it on Google Play