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Text Case Converter | Convert Text Between Common Case Styles

Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and kebab-case instantly. The developer and writer essential for consistent naming and formatting.

Last updated: June 2026 · Free · No sign-up required

Your Text

Result

Click a case button to convert your text.

Frequently Asked Questions

What is the difference between camelCase, snake_case, and kebab-case?

camelCase joins words without spaces and capitalizes each word except the first. snake_case joins words using underscores (_). kebab-case joins words using hyphens (-). These are commonly used in programming dialects.

Does this tool support unicode or accented characters?

Yes. Basic conversions like uppercase and lowercase support accented unicode characters (e.g. converting 'é' to 'É' or vice versa) natively.

Are my text inputs securely handled?

Completely. The conversion scripts run entirely client-side using JavaScript in your web browser. No data is sent to external servers, protecting your document contents.

Quick reference

Case	Example
UPPERCASE	HELLO WORLD
lowercase	hello world
Title Case	Hello World
Sentence case	Hello world
camelCase	helloWorld
snake_case	hello_world
kebab-case	hello-world

info Text Case Converter

Free text tools calculator — enter your numbers and get an instant, accurate result.

info Private by design

Everything runs locally in your browser. No uploads, no accounts, no tracking.

info Works everywhere

Fully responsive and mobile-friendly — calculate on any device, any time.

info Educational

Includes the formula and step-by-step explanation so you understand the math, not just the answer.

Interpretation guide

Use case	Pick
Headlines (AP style)	Title Case
Body copy fix from caps-lock	Sentence case
JS/JSON identifiers	camelCase
Python variables / DB columns	snake_case
URLs / CSS classes	kebab-case

lightbulb Worked example

Let's say you are using the Text Case Converter. A free tool to convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and more. Paste your text and click a button. Enter the values that match your situation into the input fields and press calculate — using realistic numbers makes the result directly useful for you.

Result: The calculator instantly applies the formula Tokenise on spaces/punctuation → apply per-style casing rules → rejoin with the style’s separator and returns the result with appropriate precision.

What this means: Read the result in the context of what you are measuring. The step-by-step breakdown lets you confirm the math and understand which input most affects the outcome.

Formula & methodology

Formula: Tokenise on spaces/punctuation → apply per-style casing rules → rejoin with the style’s separator

The Text Case Converter is built on a well-established calculation method. It uses the formula Tokenise on spaces/punctuation → apply per-style casing rules → rejoin with the style’s separator to turn your inputs into a reliable result. A free tool to convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and more. Paste your text and click a button. The steps are shown on the page so you can follow the reasoning from input to output.

Paste text in any state — even ALL CAPS.
Choose the target case; programmer cases (camel, snake, kebab) also swap separators.
Copy the converted result.

Worked example: "annual REPORT draft" → Title Case "Annual Report Draft", camelCase "annualReportDraft", kebab-case "annual-report-draft" — one paste, every variant.

Frequently asked questions

How do I fix text typed in ALL CAPS?

Enter the required values into the input fields and press the calculate button. The tool applies the formula Tokenise on spaces/punctuation → apply per-style casing rules → rejoin with the style’s separator and returns the result with a short explanation of each step, so you can check the working yourself.

What is Title Case exactly?

The Text Case Converter is free, private, and accurate: it runs entirely in your browser (no uploads, no accounts), applies the standard calculation, and explains each step so you can verify the result. A free tool to convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and more. Paste your text and click a button. There is no limit on usage, and it works on any device.

When do programmers use camelCase vs snake_case?

camelCase is standard in JavaScript, Java, and Swift for variables and functions, while snake_case is common in Python and database column names, and kebab-case is used for file names and URLs. The converter applies the convention you choose: Tokenise on spaces/punctuation → apply per-style casing rules → rejoin with the style's separator, so the same text converts cleanly between all of them.

Does the converter handle punctuation and numbers?

Yes — the converter tokenizes on spaces and punctuation, so words, numbers, and hyphenated terms are handled per-style: Title Case capitalizes each token, camelCase joins tokens and strips separators, and kebab-case lowercases and joins with hyphens. Numbers and symbols are preserved where the style allows, and punctuation is retained for sentence-style conversions.

Is there a length limit?

No hard limit — the converter processes any length of text instantly in the browser. The practical constraint is what you do with the output: database column lengths, file-name limits, and URL length caps apply after conversion. For very long documents, paste in sections to review the casing per chunk.

What does the Text Case Converter do?

A free tool to convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and more. Paste your text and click a button. The calculator takes your inputs, applies the standard calculation, and returns a clear result so you can make an informed decision without doing the math by hand.

What formula does the Text Case Converter use?

The Text Case Converter applies the standard formula: Tokenise on spaces/punctuation → apply per-style casing rules → rejoin with the style’s separator. The tool walks through each step of the calculation so you can verify the numbers yourself.

Is the Text Case Converter free and private?

Yes — the Text Case Converter. There is no sign-up, no paywall, no trial, and no limit on how many calculations you can run. CalcaTools covers its costs with non-intrusive display advertising, so the calculator itself never asks for payment or restricts any feature.

How accurate is the Text Case Converter?

The Text Case Converter applies the standard formula: Tokenise on spaces/punctuation → apply per-style casing rules → rejoin with the style’s separator. It is tested against published worked examples before launch and uses native double-precision arithmetic, so results are accurate to typical precision for the values you enter — with no intermediate rounding that could distort the answer.

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Text Case Converter | Convert Text Between Common Case Styles

Frequently Asked Questions

What is the difference between camelCase, snake_case, and kebab-case?

Does this tool support unicode or accented characters?

Are my text inputs securely handled?

Quick reference

info Text Case Converter

info Private by design

info Works everywhere

info Educational

Interpretation guide

lightbulb Worked example

Formula & methodology

Frequently asked questions

Explore the full unit converter toolkit

Length & distance

Volume, weight & capacity

Time & date

Numbers & notation

Science & energy

Files, text & color