Case Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase and more.
What is the Case Converter?
The Case Converter transforms text between UPPERCASE, lowercase, Title Case, Sentence case, aLtErNaTiNg case and inverse case. Paste any block of text, pick the case style you want and copy the converted output — all in your browser, all in a couple of clicks.
Case matters more than we admit. Headlines look sloppy when only the first word is capitalised; SQL keywords are conventionally uppercased; body copy reads badly in ALL CAPS. Manually retyping paragraphs to fix case is a waste of time — the Case Converter does it in milliseconds.
Everything runs on-device. No text is uploaded, so you can safely convert private notes, unpublished articles or confidential emails.
How to use the Case Converter
- 1Paste or type your text into the input box.
- 2Click the case style you want (Uppercase, Lowercase, Title Case, Sentence case, etc.).
- 3Preview the converted text.
- 4Copy the result to your clipboard with a single click.
- 5Reset the text area if you want to convert another string.
Key features
- Six case styles: UPPER, lower, Title, Sentence, aLt, InVeRsE
- One-click copy button
- Live preview while typing
- Preserves punctuation and line breaks
- Handles special characters and accented letters
- Works offline in every browser
Examples
Blog headline
Convert "the ten best productivity apps" to "The Ten Best Productivity Apps" using Title Case.
Legal document
Convert a paragraph to UPPERCASE for a "read carefully" section of a contract.
Programming naming
Turn a sentence into a snake_case or PascalCase identifier for code.
Why use this tool
- Eliminates tedious retyping
- Ensures consistent capitalisation across a document
- Handles very long texts instantly
- Free and unlimited
- Privacy-friendly — no uploads
Common use cases
- Cleaning up copy pasted from a PDF (often all caps)
- Preparing blog and article headlines
- Formatting SQL queries with UPPERCASE keywords
- Generating variable names for code
- Fixing accidental Caps Lock typing
- Applying editorial style guides across a document
Frequently asked questions
What is Title Case exactly?
The first letter of each significant word is capitalised (small words like "of" and "the" stay lowercase inside a phrase).
Does the tool support other languages?
Yes — any Unicode text is handled, including accented letters and non-Latin scripts.
Will punctuation be affected?
Punctuation is preserved. Only letter casing changes.
Can I chain conversions?
Yes — convert to lowercase, then to Title Case, then copy. Each button acts on the current text.
Is there a text length limit?
Practical limits depend on your device. Multi-megabyte texts convert without issue on desktop.