Case Converter
Convert text to uppercase, lowercase, title case or sentence case online free — instant text case conversion, no signup needed.
Last updated: 10 October 2026
Convert text to UPPERCASE, lowercase, Title Case or Sentence case instantly, with punctuation and accents preserved. The sample string hello WORLD — this is a TEST converted correctly in all four modes.
Case Converter
Worked Examples
Tested conversions
- hello WORLD — this is a TEST → UPPERCASE: HELLO WORLD — THIS IS A TEST
- Same input → Title Case: Hello World — This Is A Test
- Same input → Sentence case: Hello world — this is a test
Where each case belongs
- UPPERCASE for shouted warnings and legacy data fixes.
- Title Case for headlines — note this tool capitalizes every word, including of and the.
- Sentence case for body copy and UI labels.
About Case Converter
Convert text between uppercase, lowercase, title case, sentence case, and more. Quick text transformation for formatting documents, code, or social media posts. We tested by converting 'hello WORLD — this is a TEST' to each case — UPPERCASE produced 'HELLO WORLD — THIS IS A TEST', Title Case produced 'Hello World — This Is A Test', and Sentence case produced 'Hello world — this is a test', all as expected.
Limits: Title Case capitalizes all words — does not follow APA/Chicago style guide rules for small words; Does not handle camelCase or snake_case conversion for code; Very large texts (50,000+ characters) may have a slight processing delay
Who Uses This Tool
- A marketing coordinator converting a product description to UPPERCASE for a banner ad
- A writer fixing accidentally typed lowercase text in a formal letter
- A content editor converting a headline to Title Case for a blog post
Key Features
- UPPERCASE
- lowercase
- Title Case
- Sentence case
- Copy to clipboard
- Preserves punctuation and special characters
- Instant conversion
How to use Case Converter
- Paste your text.
- Click the case style you want: UPPERCASE, lowercase, Title Case, or Sentence case.
- Copy the converted text.
How It Compares
Unlike TextFixer which requires a page reload to apply case changes, this tool converts instantly as you click each option. It also preserves special characters and accents more reliably than many free online converters that strip non-ASCII characters.
Learn More
How to Convert Text Between Uppercase, Lowercase, Title Case, and Sentence CaseRead the full guide →Privacy & Security
Because processing happens directly in your browser, your files and input are not uploaded to our servers.
Written and checked by Mohammad Sohail
Conversions re-checked on 10 October 2026 with the sample string above.
About FreeDigitalToolkit →Frequently Asked Questions
What is Title Case?
Title Case capitalizes the first letter of each word: 'The Quick Brown Fox Jumps Over The Lazy Dog'. Minor words like 'a', 'the', 'and' may or may not be lowercased depending on style guides — our tool capitalizes all words.
What is Sentence case?
Sentence case capitalizes only the first letter of the first word: 'The quick brown fox jumps over the lazy dog'. This is the natural writing style for most prose.
Does this handle special characters and accents?
Yes. Accented characters like 'é', 'ñ', 'ü' are preserved correctly during conversion. Punctuation and special characters are unaffected by case changes.
Will Title Case work correctly for headlines with small words?
Our tool capitalizes all words. Some style guides (APA, Chicago) lowercase articles and prepositions in titles. You may need to manually adjust small words like 'a', 'an', 'the', 'of', 'and' after conversion.
Can I convert programming variable names?
For converting between camelCase and snake_case, use a dedicated code formatter. This tool handles natural language case conversion, not programming naming conventions.
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