Convert Case Tool

Want to change the letter casing of your text without manually editing every line? The Convert Case Tool lets you flip between sentence case, uppercase, lowercase, title-style capitalization, and more instantly. Just paste or upload your text, select a mode, and get your result live.

Whether you’re formatting content, adjusting headings, or fixing inconsistent casing in a document, this tool handles it all without any setup.

Paste your input above or import a file below.
No file chosen
Supported file type: .txt (text/plain)
Options
Sentence case
lower case
UPPER CASE
Capitalized
uncapitalize

What It Can Do:

This tool applies text case transformations using reliable rules. It recognizes punctuation for sentence boundaries, handles multiple words or lines, and respects word spacing and structure. You can process everything from short captions to long paragraphs without writing any code or macros.

If you’re switching title blocks to sentence case, fixing all-caps copy, or capitalizing names, this tool gives you full control with a single click.

It also shows a character count so you can keep track of your text’s size.

How to Use:

  1. Paste or type your text into the input box on the left.
  2. Choose a case format from the options section:
    • Sentence case capitalizes the first word of each sentence.
    • lower case turns everything to lowercase.
    • UPPER CASE transforms everything to uppercase.
    • Capitalized capitalizes the first letter of every word.
    • uncapitalize makes every word start lowercase.
  3. View the result in the right-hand box. Your converted text updates live.
  4. Copy or export the converted content using the provided buttons.
  5. Import a text file if you prefer to work from saved data.
  6. Click “Clear All” to reset both input and output instantly.

Example:

Input:

this is an example. here is another sentence!

Selected Option:

Sentence case

Output:

This is an example. Here is another sentence!

Common Use Cases:

The Convert Case Tool instantly changes the letter casing of any text. Convert text to sentence case, lowercase, UPPERCASE, capitalized words, or uncapitalized words easily. Ideal for writers, students, bloggers, coders, and professionals needing fast formatting for emails, documents, social media, academic papers, or coding.

Useful Tools & Suggestions:

If you’re working with case formatting, you might also want to check out Remove Letter Accents it’s perfect for cleaning up accented characters before applying case changes so you don’t end up with inconsistent output. And take a look at Trim Text too. It helps clear out any sneaky whitespace that can mess with how your case changes look, especially when prepping text for clean presentation or further processing.

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