Case Converter
Switch text between UPPER, lower, Title Case and a URL slug.
Paste text into the box and press one of the four buttons to rewrite it: UPPER CASE, lower case, Title Case or url-slug. Each button transforms the whole box at once, so it is quick for fixing a heading that arrived in the wrong case, normalising a shouty paragraph, or turning a title into a link-friendly slug. Everything runs in your browser — nothing is uploaded — and Copy Result and Clear handle the text once you are done.
What the four buttons do
UPPER CASE and lower case simply force every letter up or down. Title Case here is deliberately simple: it capitalises the first letter of every word and lowercases the rest, with no "minor word" rules — so "the", "of" and "a" get capitalised too. (For headline capitalisation that keeps short words lowercase, use the dedicated Title Case tool.) url-slug lowercases the text, turns every run of characters that are not letters or digits into a single hyphen, and trims hyphens from the ends, so Hello, World! (v2) becomes hello-world-v2.
Transforms apply in place, so they stack
The buttons rewrite the text box itself rather than filling a separate output panel, which means you can chain them: run Title Case and then UPPER CASE for an all-caps title, or clean text up before making a slug. The trade-off is that each conversion replaces what was there — once you press lower case, the original capitalisation is gone. If you might need the untouched version back, copy it before converting.
Copying and clearing
Copy Result puts the current contents of the box on your clipboard and does nothing if the box is empty. Clear empties it and returns the cursor so you can paste the next batch. Because every transformation, copy and clear happens locally in the page, you can safely convert internal or unpublished text without it leaving your device.
Frequently Asked Questions
What exactly does the Title Case button do?
It capitalises the first letter of every word and lowercases the rest. It has no minor-word rules, so words like "the", "of" and "and" are capitalised too. For style-guide headlines that keep those lowercase, use the separate Title Case tool.
How does the url-slug button work?
It lowercases the text, replaces every run of non-alphanumeric characters with a single hyphen, and removes hyphens from the start and end. So "Hello, World!" becomes hello-world.
Do the buttons change my original text?
Yes. They rewrite the text box in place, which lets you chain conversions but also replaces the previous version. Copy the text first if you want to keep the original.
Is my text sent anywhere?
No. All four conversions, plus Copy Result and Clear, run entirely in your browser. Nothing is uploaded, and clearing the box or closing the tab discards the text.