toolboxapp

Sentence Case Converter Online

Convert mixed or uppercase text to sentence case online. Free browser tool with no uploads.

Normalize text so sentences begin with a capital letter while the rest of the wording returns to normal lowercase.
0 chars
Text Tools

Free  ·  Local browser processing  ·  No signup

What this tool helps you do

Normalize text so sentences begin with a capital letter while the rest of the wording returns to normal lowercase.

This page uses the same tested Text Case Converter engine as the main tool, but focuses on this specific task so you can get straight to the relevant workflow without hunting through a generic converter.

How to use it

  1. Paste or enter the content you want to process in the tool above.
  2. Use the preselected mode when this task has a specific mode, then click Run.
  3. Review the output, then copy or download it if the tool provides a download option.

Common uses

  • Cleaning copied headings
  • Fixing ALL CAPS paragraphs
  • Normalizing notes before editing

Example

Input: THIS IS A SENTENCE. HERE IS ANOTHER.

Expected result: This is a sentence. Here is another.

Useful tip

Proper nouns may need manual capitalization after automatic sentence-case conversion.

Frequently asked questions

Is this tool free?

Yes. The tool is free to use, requires no account and runs directly in your browser.

Is my input uploaded to a server?

No. The tool processes the input locally in your browser. Your tool input is not sent to ToolboxApp servers.

When should I use Text Case Converter?

Cleaning copied headings, fixing all caps paragraphs, or normalizing notes before editing.