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Free Text Case Converter

Last reviewed: August 3, 2026

FlipMyCase is a free online text converter with 75 interactive tools and 3 reference guides, including case converters, text cleaners, encoders, generators, and formatters. Select a tool below to transform your text — no signup required.

Input
0 words · 0 chars
Common
UPPERCASE
 
lowercase
 
Title Case
 
Sentence case
 
Developer & URL formats
camelCase
 
PascalCase
 
snake_case
 
kebab-case
 
CONSTANT_CASE
 
dot.case
 
slug
 
Other styles
aLtErNaTiNg
 
tOgGlE cAsE
 
sPoNgEbOb CaSe
 
rAnDoM cAsE
 
iNVERSE cASE
 
Ctrl/⌘ + K focuses input

How to Convert Text Case Online

1. Paste your text into the input box above or type directly. The tool accepts any length of text.

2. See all formats at once. The converter instantly shows your text in uppercase, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case, alternating case, inverse case, and URL slug format.

3. Click Copy on any output card to copy that format to your clipboard. Paste it wherever you need it.

Supported Text Case Formats

UPPERCASE

Converts all letters to capital letters.

lowercase

Converts all letters to small letters.

Title Case

Capitalizes the first letter of each major word.

Sentence case

Capitalizes the first letter of each sentence.

camelCase

First word lowercase, subsequent words capitalized, no separators.

PascalCase

Every word capitalized, no separators.

snake_case

All lowercase with underscores between words.

kebab-case

All lowercase with hyphens between words. Common in URLs.

CONSTANT_CASE

All uppercase with underscores. Used for constants in code.

dot.case

All lowercase with dots between words.

aLtErNaTiNg

Alternates between lowercase and uppercase letters.

tOgGlE cAsE

Starts with lowercase, alternates each letter (toggle style).

sPoNgEbOb CaSe

Random-looking alternating case like the SpongeBob meme.

rAnDoM cAsE

Randomly chooses uppercase or lowercase for each letter.

iNVERSE cASE

Swaps uppercase to lowercase and vice versa.

slug

URL-friendly format with hyphens, no special characters.

When to Use a Case Converter

Writing and blogging: Convert headings to Title Case for articles and landing pages, normalize inconsistent capitalization, or generate a URL-friendly slug from a draft title.

Software development: Convert identifiers between camelCase, snake_case, PascalCase, and CONSTANT_CASE when moving between JavaScript, Python, SQL, and other naming conventions.

Data cleanup: Normalize messy text from PDFs, spreadsheets, or email by converting to lowercase first, then applying the format you need.

SEO and URLs: Generate lowercase hyphenated slugs from page titles for clean, crawlable URLs that search engines prefer.

Social media: Use alternating case or inverse case for stylistic effect in posts and comments.

How does the text case converter work?

Paste any text, click a format button, and FlipMyCase converts it instantly in your browser. No account or installation needed.

The converter applies 16 deterministic JavaScript transformations in the page and shows every result together, so you can compare formats before copying one. Tool input is not intentionally sent to FlipMyCase or analytics. Very large text can take longer to render, depending on the device and browser.

What text case formats does FlipMyCase support?

FlipMyCase supports 16 outputs, including UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case, inverse case, alternating styles, and a URL slug.

UPPERCASE and lowercase are the most common for basic text normalization. Title Case follows common heading conventions. camelCase and PascalCase are widely used in JavaScript and TypeScript, snake_case is common in Python and SQL, and kebab-case is common in URLs and CSS class names. Alternating and random-looking styles are primarily useful for informal or decorative text.

Who uses a text case converter?

Developers, writers, students, and social media managers use text case converters to reformat copy quickly without manual editing.

Software developers use it to rename variables, database columns, and API fields when switching between languages with different naming conventions. Content writers use Title Case for headlines, document titles, and formal headings where capitalization conventions signal professionalism and readability. Students and social media users use alternating case and other stylistic formats for emphasis or humor in posts.

How does FlipMyCase handle sensitive text?

Case conversion runs in your browser. The case converter does not send pasted text to FlipMyCase servers or save it in browser storage.

Local processing reduces network exposure, but it cannot protect you from a compromised device, browser extension, shared clipboard, or screen capture. Do not paste passwords, private keys, active access tokens, or other secrets into any website. Use the Clear control when you are finished with ordinary private text.

Further Reading

Frequently Asked Questions About Text Case Converter

What is a text case converter?

A text case converter is a free online tool that instantly transforms your text between formats including UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, and kebab-case. No software installation required.

How do I convert text to title case?

Paste your text into the converter, then click the Title Case button. The tool capitalizes the first letter of each major word and lowercases articles, conjunctions, and prepositions following standard title case rules.

What is the difference between camelCase and PascalCase?

camelCase starts with a lowercase letter and capitalizes each subsequent word (e.g., myVariableName). PascalCase capitalizes the first letter of every word including the first (e.g., MyVariableName). Developers use camelCase for variables and PascalCase for class names.

Is this text case converter free to use?

Yes. FlipMyCase is free and requires no account. The converter processes text in your browser and does not intentionally send tool input to FlipMyCase or analytics.

What is snake_case used for?

snake_case uses underscores between words with all letters in lowercase (e.g., my_variable_name). It is the standard naming convention in Python, Ruby, and SQL, and is commonly used for file names, database columns, and API parameters.

More Free Text Tools

Most people who convert case also need to clean up extra spaces or check how long the result is. The text cleaner removes spacing artifacts from copy-pasted text, and the word counter shows length, reading time, and keyword density.