Free · No signup · Browser-based

Case Converter

Switch between upper, lower, title and sentence case.

Your textPaste or type text to change its capitalization

Converted textSelect a format above to generate the result

Practical guide

What this case converter tool is for

Change capitalization patterns without retyping text, including uppercase, lowercase, title-style and sentence-style transformations.

Best for: Headlines, labels, pasted text, spreadsheet exports and cleanup after accidental Caps Lock.

How it works in practice

Mechanical case conversion does not understand every writing style. Proper nouns, acronyms, brand capitalization and title-case “small word” rules can require manual review.

Example: “NASA launches new mission” should not blindly become “Nasa Launches New Mission” if you need the official acronym capitalization.

Before you use it

Proper nouns and acronyms may need correction after conversion.
Title case rules vary by style guide.
Sentence case cannot always infer where a fragment should begin or whether a lowercase brand is intentional.

Tips for a better result

Convert first, then scan names, brands and acronyms.
Use the title style required by your publisher rather than assuming one universal rule.
Keep a copy of unusually formatted source text before bulk conversion.

Privacy note: Core file/text transformations are designed to run in your browser. The page can still load normal website resources and third-party libraries/models. See our Privacy Policy and tool testing notes for details.

Implementation transparency

/ what this browser tool actually does

Implementation description

How this specific tool processes your input

Transforms character case deterministically in the browser. It changes letter casing but does not understand names, acronyms, sentence meaning or editorial style.

Verification checklist

Check acronyms, brand names and proper nouns after conversion.
Review sentence case around abbreviations and punctuation.

Use another method when…

Edit manually when capitalization carries meaning or must follow a publication style guide.

This section describes the implementation shipped with My Tools HQ. Verify important outputs before relying on them.

Got a different result? Report a problem with Case Converter. Include your browser, steps and expected result. Please do not send sensitive files.

Questions about Case Converter

/ useful answers

What is sentence case?

It generally capitalizes the beginning of sentences while making most other letters lowercase, though names and acronyms may still need manual correction.

Why is my brand name changed?

A case converter applies rules mechanically and does not know every brand’s preferred capitalization.

Is title case universal?

No. APA, Chicago, AP and other style systems differ on which short words are capitalized.

Related tools

/ continue your workflow