Text Case Converter

Use the Text Case Converter to instantly switch between lower case, upper case, sentence case, and more for polished copy.

✏️
Your Text
0 characters•0 words•0 lines
📝

Results will appear here

Enter your text and click the button

Text formatting broken? Pasted from Facebook and seeing weird characters?Clean invisible characters with AIWatermarkEraser →

Use this free Text Case Converter to convert text to uppercase, lowercase, title case, and more.

About the Text Case Converter

The Text Case Converter cleans up messy copy and keeps branding consistent by flipping text between upper case, lower case, sentence case, title case, and more. Content teams, SEO writers, and social media managers use it to stop manual retyping and keep copy compliant with style guides.

How the text case converter works

Four modes map to four short JavaScript routines. Uppercase and lowercase call toUpperCase() and toLowerCase(), which apply Unicode's full case mappings — German ß expands to SS, and Greek or Cyrillic convert correctly. Title case runs the regular expression /\w\S*/g across the text, uppercasing each match's first character and lowercasing the rest; every word is capitalized, articles and prepositions included, and since \w covers only ASCII letters, a word starting with an accented character can end up capitalized on its second letter. Sentence case uppercases just the first character of the whole input and lowercases everything after it. All of it runs in your browser.

Popular Use Cases

1Reformatting email subject lines and newsletter headlines to follow consistent title case before sending.
2Cleaning pasted all-caps text from legacy databases or PDFs into readable sentence case for import into a CMS.
3Preparing uniform product names and category labels for e-commerce catalogs across multiple platforms.
4Converting code comments and variable names between camelCase, snake_case, and other developer-friendly formats.
5Standardizing social media captions across teams so every scheduled post matches the brand style guide.
6Quickly generating ALL CAPS text for design mockups, banners, and attention-grabbing CTAs.

Why Writers Love This Converter

Supports all common casing rules, including sentence, title, upper, lower, and alternating cases for typography experiments.
Runs entirely in the browser so sensitive drafts never leave your device.
Saves custom text between sessions, making quick tweaks during editorial reviews effortless.

How to Use the Text Case Converter

1

Paste or type any block of text into the input field. The tool supports short captions, long-form articles, and code comments.

2

Select the case you need: lower case for SEO descriptions, sentence case for support emails, title case for blog headings, or upper case for design mockups.

3

Review the live preview to confirm punctuation and name capitalization look correct.

4

Copy the converted text and drop it into CMS entries, design tools, or scheduling platforms without extra formatting.

Pro Tips for Better Results

Tip 1Strip extra whitespace and line breaks before converting—most case rules assume single spaces between words.
Tip 2Run the converter twice when switching from ALL CAPS: first to lower case, then to sentence or title case for cleaner output.
Tip 3Bookmark frequently used case modes so you can jump straight to title case or sentence case without re-selecting each time.
Tip 4Pair this tool with the Trim Whitespace tool on MiniToolStack to clean and format text in a single workflow.

Common Mistakes to Avoid

Pasting text that already contains inconsistent spacing—clean extra spaces before converting to prevent doubled gaps.
Expecting brand names or acronyms to stay capitalized in sentence case. Double-check proper nouns after conversion.
Copying formatted text straight from a CMS. Use plain text input to avoid hidden HTML entities sneaking into the output.

See also

  • Trim Whitespace — Title case splits on whitespace, so clearing double spaces and stray tabs first gives cleaner word boundaries.
  • Slug Generator — When the lowercase output is headed for a URL, this turns it into a hyphenated, transliterated slug.

FAQ

Can the Text Case Converter handle long-form articles?

Yes. The converter processes thousands of characters instantly, so you can clean newsletters, knowledge base articles, and transcripts in one go.

Does it support sentence case and title case rules?

It follows standard English capitalization rules for sentence and title case, keeping the first letter of each sentence or significant word capitalized while skipping small connector words.

Will my text leave the browser?

No. Everything runs client-side, so drafts, emails, and private notes stay on your device for maximum privacy.

How do I keep brand names capitalized?

After conversion, skim the preview and manually adjust branded terms or acronyms that require custom capitalization.