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Case Converter

FreeInstant
star4.5(680 ratings)

Free uppercase lowercase converter for text transformation. Convert to lower case, title case, or any format instantly. Works better than Excel convert case functions.

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About Case Converter

Need to convert upper case to lower case or transform text between different formats? Our free uppercase lowercase converter handles all your text case conversion needs instantly—no formulas or software required.

Whether you're preparing headlines in Title Case, formatting code variables in camelCase, or need to convert to lower case for database fields, our letter case converter supports 10+ different formats. Simply paste your text and click to transform—faster and easier than trying to change letter case in Word or Excel.

Unlike built-in tools that require formulas, our online case converter works instantly for any amount of text. Convert a single word or entire documents with one click. The tool is perfect for developers, writers, marketers, and anyone who works with text regularly and needs consistent formatting.

Common uses include converting Excel data (our tool works better than Excel convert case functions for bulk operations), preparing content for different platforms, formatting code identifiers, and cleaning up copy-pasted text from various sources.

All conversions happen in your browser—your text is never sent to any server. Convert as much text as you need, completely free with no signup or account required.

Why Use This Tool?

  • checkInstantly convert upper case to lower case or any format
  • checkFaster than Excel convert case formulas for bulk text
  • check10+ formats: Title Case, camelCase, snake_case, and more
  • checkWorks with any length text - single words to documents
  • check100% private - text never leaves your browser
  • checkFree forever with no signup or limits

Common Use Cases

1Headline Formatting

Use the title case converter to properly capitalize blog posts, articles, and ad headlines

2Excel Data Cleanup

Excel convert case faster than UPPER/LOWER formulas - paste, convert, paste back

3Code Variable Naming

Convert to camelCase, PascalCase, or snake_case for consistent code styling

4URL Slug Generation

Transform titles to kebab-case for SEO-friendly URLs and permalinks

5Database Field Formatting

Convert to lower case with underscores for SQL column naming conventions

6Social Media Posts

Change letter case for eye-catching posts or normalize copy-pasted text

play_circleHow It Works

Paste your text in the input field, then click any conversion button: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, dot.case, or CONSTANT_CASE. Your converted text appears instantly—copy it with one click. No formulas, no software, no signup.

Frequently Asked Questions

What is a case converter and how does it work?expand_more
A case converter (also called letter case converter or uppercase lowercase converter) transforms text between different capitalization styles instantly. Paste your text and click any format button to convert—it handles UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, and more. All processing happens in your browser for complete privacy.
How do I convert upper case to lower case?expand_more
Simply paste your UPPERCASE text into our converter and click the 'lowercase' button. Your text will instantly convert to lower case. This works for any amount of text—from single words to entire documents. It's faster and easier than using formulas to convert to lower case in spreadsheets or word processors.
How does this compare to Excel convert case functions?expand_more
Our tool is significantly faster than Excel convert case formulas (UPPER, LOWER, PROPER). In Excel, you need to create a formula column, apply it to each cell, then copy-paste values. With our converter, you paste all text at once, click one button, and copy the results. For bulk operations, we save substantial time compared to Excel convert case workflows.
What case formats are available in the title case converter?expand_more
We support 10 formats: UPPERCASE, lowercase, Title Case (for headlines), Sentence case (first letter capitalized), camelCase (for JavaScript), PascalCase (for classes), snake_case (for Python/databases), kebab-case (for URLs), dot.case, and CONSTANT_CASE (for programming constants). Each serves different purposes in writing and coding.
Can I change letter case in Word documents using this tool?expand_more
Yes! If you need to change letter case in Word but want more options than Word's built-in feature, copy your text from Word, paste it into our converter, apply your desired format, then paste back. This gives you access to formats Word doesn't offer natively, like camelCase, snake_case, and kebab-case.
Is this uppercase lowercase converter free?expand_more
Yes, our case converter is completely free with no signup required. Convert unlimited text of any length—there are no daily limits or premium tiers. All 10 conversion styles are included at no cost. Your text never leaves your browser, so it's both free and private.

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