Tools
Lowercase converter
Convert text to lowercase
Turn any text into lowercase in one click, handy for tidying all-caps text.
About this tool
Turn every letter in a block of text into lowercase with one click. It is the quick fix when someone typed an email or document with Caps Lock on, when you copy data from an old system that stores everything in CAPITALS, or when you prepare email lists, tags or URL slugs that must be lowercase so they don’t end up duplicated. Accented letters are handled properly: “CAFÉ” becomes “café”.
Paste your text into the box and press “Convert to lowercase”. The result replaces the original and you can copy it with the button alongside. If you then want capitals back at the start of each sentence, use “Sentence case” in the Case panel; to remove repeated lines from a list you have just normalised, use “Remove duplicates” in the Lines panel.
Everything happens in your browser: the text is not uploaded anywhere, though it stays in local storage until you clear it. The converter cannot tell which words are names or acronyms, so “NASA” or “London” will also end up in lowercase — check them before you publish.
How do I convert text to lowercase?
- Paste your text into the “Start typing or paste text here…” box, or type it in directly.
- Press “Convert to lowercase”. All the text in the box is converted in one go.
- If the result is not what you wanted, undo it with Ctrl+Z (Cmd+Z on a Mac): the conversion goes into the box’s undo history.
- Copy the result with “Copy text”, or download it as text.txt with the “Download” button in the bar below.
What is the difference between lowercase and sentence case?
“Convert to lowercase” makes every letter lowercase, with no exceptions. “Sentence case”, in the Case panel, does the same and then puts back the capital on the first letter of the text and on the letter after a full stop, question mark, exclamation mark or ellipsis. “HELLO. HOW ARE YOU?” becomes “hello. how are you?” in lowercase and “Hello. How are you?” in sentence case.
Use lowercase for data that will be compared, such as email addresses, tags, file names or lists. Use sentence case for text that a person will read.
What else can I do with the text in the same editor?
Above the box there are five panels. “Case” has “UPPERCASE”, “lowercase”, “Title Case”, “Sentence case” and the programming formats camelCase, snake_case and kebab-case; those three also strip accents.
In “Lines” you can sort, reverse, number lines or “Remove duplicates”; in “Clean up”, “Trim lines”, “Remove extra spaces” or “Join lines”; in “Find & replace”, swap one word for another throughout the text; and in “Extract”, pull out the email addresses, web addresses or numbers it contains.
Where is the text stored?
The text never leaves your browser. It is saved automatically to the browser’s local storage one second after you stop typing, and the bar below shows “Saved at” followed by the time. That way you do not lose it if you reload the page.
The other pages that use this editor, such as the sentence case one, share the same saved text. To delete it, press the “Clear” button in the bar below and confirm.
Frequently asked questions
How do I fix text typed with Caps Lock on?
Convert it to lowercase here, then apply “Sentence case” so each sentence starts with a capital. You will only need to fix proper nouns by hand.
Is it useful for cleaning up an email list?
Yes. Email addresses are effectively case-insensitive, so lowercasing them before removing duplicates stops the same person being counted twice.
Does it work with accented or non-Latin letters?
Yes. “ÉCOLE” becomes “école”, and Greek or Cyrillic capitals are converted too.
Can I lowercase just part of my text?
The tool converts everything in the box. For one section, paste just that part, convert it and copy it back into your document.