Sentence Case Converter

Convert text to sentence case: the first letter of each sentence capitalised, the rest lowercase. Free, private and online, with nothing uploaded.

About this tool

Clean Up Capitalisation Sentence by Sentence

Shouting text, random capitals or all-lowercase notes become normal prose: each sentence starts with a capital letter and the rest is lowercase.

How to use it

  1. Paste your text.
  2. Review the sentence-case result.
  3. Re-capitalise names if needed, then copy.

Frequently asked questions

Are proper nouns kept?

No tool can tell names from ordinary words reliably, so names inside a sentence become lowercase; fix them after converting.

Is my text uploaded anywhere?

No. The tool runs in your browser and the text never leaves your device, so you can paste confidential drafts, contracts or customer data.