This free text case converter instantly changes any text between eight different case formats — UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case, and aLtErNaTiNg case. Paste your text, click the format you need, and copy the result. Use it as an all caps to lowercase converter, a letter case converter for headlines, a title case converter for article titles, or a capitalisation converter for any text formatting task. No typing, no retyping, no manual editing — one click and it is done.

In our content work at Arb Digital, we use a case converter daily — converting heading drafts to proper title case, fixing pasted text from client documents that arrived in the wrong format, and generating variable names for code. It is one of those tools that earns its place in every writer’s and developer’s browser.

Uppercase to Lowercase Converter — and Every Direction

The most common use of this case converter is switching between uppercase and lowercase. Whether you need to convert all caps to lowercase after accidentally typing with caps lock on, or convert lower case to upper case for a design element or emphasis, the conversion happens instantly for any amount of text. This upper case to lower case converter handles everything from a single word to an entire document in one click.

The full conversion options available in this lowercase converter and converter uppercase tool:

• UPPERCASE — every letter capitalised. Perfect for acronyms, emphasis, and design headers where caps are intentional.
• lowercase — every letter small. Clean, modern, widely used in minimalist branding and casual digital communication.
• Title Case — first letter of each major word capitalised. The standard for article headlines, book titles, and page headings.
• Sentence case — only the first letter of each sentence capitalised. Natural, readable, increasingly preferred in modern UI and content.
• camelCase — words joined with no spaces, each capitalised after the first (likeThis). Used in JavaScript, Java, and many API naming conventions.
• snake_case — words joined with underscores in lowercase (like_this). Standard in Python, databases, and file naming.
• kebab-case — words joined with hyphens (like-this). The standard for CSS classes, URL slugs, and HTML attributes.
• aLtErNaTiNg — alternating upper and lower letters. A playful, ironic style popular in meme culture and casual social media.

All Caps to Lowercase — Fix Caps Lock Mistakes Instantly

Accidentally typing a paragraph with caps lock on is one of the most common text mistakes. Previously fixing it meant retyping or manually correcting every letter. This all caps to lowercase converter eliminates that entirely: paste the ALL CAPS text, click “lowercase” or “Sentence case,” and the problem is gone in one click.

The caps lock to lowercase function works the same way in reverse — if you need to convert small case to uppercase for a headline or label, click “UPPERCASE” and every letter is instantly capitalised. This caps converter handles both directions and any text length, from a single word to thousands of characters. This caps to lowercase online tool is the same function used in word processors — just faster and accessible directly in your browser without opening any software.

Title Case Converter — Headlines Done Right

This title case converter follows the standard rule for title capitalisation: the first letter of each word is capitalised. This is the style most widely used for article headlines, book titles, website page headings, and document section titles. The titlecaseconverter function here works by lowercasing all text first, then capitalising the first letter of each word — giving a clean, consistent result regardless of how the original text was formatted.

For AP style (used by journalists and media organisations), the AP title case convention lowercases short prepositions, conjunctions, and articles (of, and, the, in, etc.) unless they begin the title. This ap title case converter result capitalises all words — you may want to manually lowercase minor words afterwards if your publication follows strict AP or Chicago style. For most web content and general use, capitalising every word produces perfectly acceptable title case that reads well and looks professional.

Sentence Case vs Title Case — Which Should You Use?

The choice between sentence case and title case for headings is one of the most debated questions in content formatting — and both are valid. Title Case (Like This Heading) is traditional, formal, and associated with journalism, academia, and classic publishing. Sentence case (Like this heading) feels modern, conversational, and is increasingly preferred by major tech companies, SaaS brands, and contemporary publications.

The most important rule is consistency: pick one style for your headings and apply it throughout your entire website, document, or publication. Mixing Title Case and sentence case on the same page — even unintentionally — reads as careless. Use this text case converter to apply your chosen style consistently across all headings in one pass rather than checking each one manually.

camelCase, snake_case, and kebab-case for Developers

For developers, this case converter tool eliminates manual formatting of variable names, database fields, function names, and CSS classes. Converting a phrase like “user first name” into the required format for different languages:

• camelCase → userFirstName (JavaScript variables, React props, Java methods)
• snake_case → user_first_name (Python variables, SQL columns, Ruby symbols)
• kebab-case → user-first-name (CSS classes, HTML data attributes, URL slugs)

The change case of text operation for development is particularly time-saving when converting a list of labels or field names between conventions — common when migrating between languages, working with APIs, or standardising an inconsistent codebase. Paste the full list, click the target case, and copy the result. Our Arb Digital development team pairs this case converter tool with our slug generator for URL creation and our word counter for content length checks. Browse all tools in our free tools hub.

Frequently Asked Questions