Swap Case
Invert the case of every letter in your text — uppercase becomes lowercase and lowercase becomes uppercase. Instant and 100% in your browser.
What is the Swap Case?
Swap Case flips the capitalization of every letter in your text: uppercase letters become lowercase and lowercase letters become uppercase.
- Inverts upper and lower case for every letter
- Leaves numbers and punctuation unchanged
- Instant live conversion as you type
- Copy or download the swapped text
- Runs locally — nothing is uploaded
How to use the Swap Case
- 1
Paste or type your text into the input box.
- 2
The case-swapped version appears automatically.
- 3
Review the inverted capitalization.
- 4
Copy or download the result.
About the Swap Case
Swap Case flips the capitalization of every letter in your text: uppercase letters become lowercase and lowercase letters become uppercase. Paste any text and get the mirror-image casing instantly.
It is useful for fixing text typed with Caps Lock on, creating stylised captions, or quickly inverting the case of a heading. Numbers, punctuation and spacing are left untouched — only letters change.
The conversion runs entirely in your browser, so your text is never uploaded. Your content stays private and the tool works offline whenever you need a fast case swap.
Frequently asked questions
What does swap case do?
It inverts the case of each letter, so every uppercase letter becomes lowercase and every lowercase letter becomes uppercase.
How is this different from uppercase or lowercase?
Instead of making everything one case, swap case flips each letter's existing case, producing a mixed result based on your original text.
Does it change numbers or symbols?
No. Only alphabetic characters are affected. Digits, punctuation and spacing stay exactly as they are.
Is my text uploaded?
No. The swap runs in your browser, so your text stays on your device and the tool works offline.
Guides for Swap Case
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