TextRepeat.org

Free online formatting tool

Case Converter

Paste text and convert it to lowercase, uppercase, title case, sentence case, alternating case, inverse case, camelCase, PascalCase, snake_case, or kebab-case.

Free case converter

Convert text to lowercase, uppercase, title case, sentence case, camelCase, PascalCase, snake_case, and kebab-case.

lowercase

Convert every letter to lowercase.

How to use the case converter

  1. 1

    Paste your text

    Add the text you want to reformat, such as a heading, paragraph, variable name, or list.

  2. 2

    Choose a case mode

    Pick lowercase, UPPERCASE, Title Case, Sentence case, alternating case, inverse case, camelCase, PascalCase, snake_case, or kebab-case.

  3. 3

    Copy the converted text

    Review the output, switch modes if needed, then copy the converted result.

Common case converter use cases

A case converter saves time when text needs to match a platform, style guide, code convention, or publishing format.

Fix pasted text

Convert accidental all-caps text to lowercase, sentence case, or title case before sending.

Format headings

Turn article titles, section headings, and labels into cleaner title case.

Create code names

Convert labels into camelCase, PascalCase, snake_case, or kebab-case for development work.

Social and chat styling

Make alternating or inverse case text for playful messages, captions, and comments.

About this case converter

Multiple text case modes

This case converter supports everyday writing formats and developer naming styles in one place, so you can switch between readable text and code-friendly identifiers quickly.

Works instantly in your browser

Conversion happens as soon as you choose a mode. You can experiment with several formats without sending text to a backend or waiting for a page reload.

Private by design

Your text is processed locally in the browser. TextRepeat.org does not need to upload, store, or log your input for case conversion.

How to choose the right text case for writing and code

Changing letter case looks simple until the same label must work as a heading, a sentence, a database key, and a JavaScript variable. A case converter is useful when you treat each mode as a formatting decision with a destination, not as a cosmetic transformation. This guide explains the common modes, their limits, and a quick review process for avoiding accidental changes.

Separate reader-facing text from identifiers

Use sentence case for most explanatory copy because it is easy to read in paragraphs, forms, and interface messages. Use title case selectively for headings and short labels when your style guide calls for it. All caps can draw attention to a small label, but a full paragraph in uppercase is slower to read and may look like shouting. Choosing a readable mode first keeps the content clear before you fine-tune the visual style.

Code identifiers have different requirements. camelCase, PascalCase, snake_case, and kebab-case help a program or configuration system distinguish words consistently. Do not paste a converted identifier back into user-facing prose without checking it: removed spaces and changed capitalization can make a friendly sentence confusing.

Know what each developer case assumes

camelCase begins with a lowercase word and capitalizes later word boundaries, while PascalCase capitalizes the first word too. snake_case uses underscores and is common in Python variables, database columns, and configuration keys. kebab-case uses hyphens and is common in URLs, CSS class names, and command-line options. The correct mode depends on the naming convention of the system you are joining.

Automatic conversion cannot always infer word boundaries from abbreviations, product names, or existing acronyms. Review outputs such as API, URL, HTML, or a brand name manually. If the source contains punctuation or mixed casing, verify that the converter's interpretation matches the convention used by your project.

Use title and sentence case with editorial judgment

Title case rules differ between publications. Some style guides capitalize every major word, while others keep short conjunctions and prepositions lowercase. A converter provides a quick baseline, but it cannot know your house style, proper nouns, or the intended emphasis. Check articles, prepositions, acronyms, and names before publishing a headline.

Sentence case is usually safer for interface labels and documentation because it creates a consistent reading rhythm. After converting, read the full result rather than only inspecting the first word. A correct transformation can still leave a heading with the wrong emphasis or an acronym that needs manual restoration.

Handle spaces, punctuation, and multilingual text carefully

Case conversion changes letters, not the meaning of punctuation. Still, punctuation and whitespace affect how a tool detects word boundaries. Lists, file names, hyphenated terms, apostrophes, numbers, and symbols may require a manual check after conversion. Copy a small representative sample first when the source contains unusual formatting.

Languages do not all use capitalization in the same way. Some scripts have no upper- and lowercase distinction, and proper-name rules vary by language. Use the converter where its mode matches the language, then ask a fluent reviewer to check the result when the text is public-facing or legally important.

Review before copying into a project

A reliable workflow is simple: paste the source, choose the target convention, compare the first and last few words, then copy the result. For code, check that the identifier is legal in the destination language and does not collide with a reserved word. For a page title, check readability, brand spelling, and the surrounding sentence before publishing.

Conversion happens in the browser and does not require an account or an upload. Use synthetic examples when testing sensitive labels, and keep the original source nearby. A case converter saves repetitive editing time, but the final responsibility for meaning, naming conventions, and public wording stays with the person making the change.

Case converter FAQ