01 — INPUT
Paste your text
Type, paste, or open a local .txt or .md file. The original stays visible while you work.
The text workbench
Case Converter
Change text to uppercase, lowercase, title case and more. Preview, copy or download your result in one focused workspace.
Browser-local conversion. No upload by this tool. Ads, when enabled, may process website information.
Make the change
Local, instant conversion
0 code points0 words0 / 500,000 code units
Input exceeds the 500,000 UTF-16 code unit limit. Shorten your text to convert it.
0 code points0 wordsCopy-ready output
UPPERCASE
Make every cased letter uppercase.
Developer naming formats remove spaces and punctuation and may change word boundaries. Keep your original text for reference.
Try a sample
Alt + 1–5 choose a mode
01 / Getting started
From rough text to right-case text in seconds.
Pick the case you need and keep control of the original. No rewriting, unnecessary steps, or switching between converter pages.
02 — CONVERT
Select a case
Choose uppercase, lowercase, sentence case, title case, or word capitalization. More styles sit one click away.
03 — EXPORT
Copy or download
Review the result side by side, copy it, or save it as plain text, Markdown or structured JSON.
02 / Case guide
Which case do you need?
The right capitalization depends on whether you're writing a heading, fixing pasted text, or naming a variable. Every mode has an explicit behavior.
Explore every conversion mode| Case | When to use it | Example result |
|---|---|---|
| UPPERCASE | Labels, emphasis, codes that require capitals | HELLO WORLD |
| lowercase | Normalize mixed capital letters | hello world |
| Sentence case | Normalize the beginning of sentences | Hello world. How are you? |
| Title Case | Headlines and headings in general English style | The Art of Writing |
| Capitalize Words | Give each word an initial capital | The Art Of Writing |
| camelCase | Variable names with no separators | helloWorld |
| snake_case | Identifiers separated with underscores | hello_world |
| kebab-case | Slugs and identifiers separated by hyphens | hello-world |
03 / Built for real text
Fast to use, careful with your words.
Every standard conversion runs in your browser using the text you provide. Punctuation and whitespace stay intact for writing-oriented modes; developer formats intentionally rebuild separators.
- Original input remains separate from the result.
- Language-aware upper/lowercase includes Turkish and German options.
- Clear Undo and explicit source/result swapping.
- Local text file opening without an upload.
04 / What to know
Clear rules beat hidden surprises.
Capitalization is not the same as grammar correction. Sentence case cannot reliably infer brand spelling or proper names. Title Case follows a documented general English convention, not any specific editorial style guide.
Unicode can change the number of characters after capitalization. Code-oriented modes can remove punctuation and spacing. That's why your original stays visible.
Read the method and limitations05 / Questions
Good to know.
How do I convert uppercase text to lowercase?
Paste the uppercase text in the left editor and choose lowercase. The converted result appears on the right, ready to copy or download.
What's the difference between Title Case and Capitalize Words?
Capitalize Words gives every word a leading capital. Title Case keeps selected short English words such as “of” and “the” lowercase unless they're the first or last word.
Does the converter upload my text?
No. Conversions and local file opening happen in this browser. The tool sends no entered text to a server; static website requests and any future separate advertising services are different matters.
Can I convert text from a file?
Yes. Open a .txt or .md file up to 1 MB, review its text, and choose a case. Word, PDF, and other document formats are not parsed.
Does it preserve formatting?
Uppercase, lowercase, sentence case, title case and word capitalization preserve spacing, tabs and line breaks. Developer identifier modes deliberately collapse separators.