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lowercase Converter
Turn any text into lowercase instantly — perfect for text typed with caps lock on or data that needs consistent case.
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lowercase Converter converts your text locally in your browser.
Make any text lowercase instantly
Text often arrives in the wrong case: a message typed with caps lock on, a heading copied from a design in capitals, or a list of names, tags, or email addresses with inconsistent capitalization. This converter lowercases every letter as soon as you paste or type, giving you consistent text for hashtags, usernames, file names, URLs, and data you plan to sort or compare.
How to convert text to lowercase
- Type or paste your text, or choose Upload Document to open a .txt, .md, .docx, or .pdf file.
- The lowercase version appears immediately below.
- Copy Result to use it elsewhere, or Replace Input with Result to keep working here — Undo Replace restores your original.
What lowercasing does to your text
Every capital letter becomes lowercase — including acronyms and names — while numbers, punctuation, symbols, spaces, and line breaks stay the same.
| You enter | You get |
|---|---|
| PLEASE REPLY BY FRIDAY! | please reply by friday! |
| Jane.Doe@Example.COM | jane.doe@example.com |
| ΟΔΟΣ ΑΘΗΝΑΣ | οδος αθηνας |
- Greek text gets the correct final sigma: a Σ at the end of a word becomes ς, not σ.
- Lowercasing is a good first step before comparing or removing duplicates from lists, because “Apple” and “apple” become identical.
- If you want normal capitalization instead of all lowercase — capitals at the start of sentences — use Sentence case in the Case Converter.
Your text stays on your device
- Text is converted by JavaScript running in your browser.
- Your text is never uploaded to Looty Tools or any other server.
- Uploaded documents are opened and read in your browser; the file itself is never sent to Looty Tools.
- Nothing is stored — refreshing or closing the page clears both boxes.
Limitations
- Uploads accept .txt and .md files up to 5 MB, Word .docx files up to 15 MB, and PDFs up to 25 MB and 50 pages. Older .doc files are not supported, scanned or image-only PDFs have no text to convert, and formatting such as bold or italics is not kept.
- Capitals cannot be restored automatically after lowercasing, so names and acronyms need to be fixed by hand if you need them later.
- Language-specific rules are not applied: the Turkish capital İ becomes an i with a combining dot rather than a plain i, and Turkish dotless ı is not produced.
- Email addresses: only the domain is guaranteed to be case-insensitive, so avoid changing the part before the @ for addresses you do not control.
Related text tools
- Case ConverterSwitch text between upper, lower, title, and sentence case.
- UPPERCASE ConverterTurn text into uppercase letters.
- Title Case ConverterCapitalize the main words in a title.
Guides
- When Text Should Be LowercaseWhere lowercase is the safe default — URL slugs, email addresses, usernames, tags, and file names — which parts are case-sensitive, and when lowercase is the wrong choice.
- Lowercase in Branding and StyleWhy designers and writers choose lowercase for logos, names, and interface text, the tradeoffs, and how to handle stylized lowercase names in your own writing.
- Lowercase for Comparing TextHow lowercasing helps match and deduplicate text, why case folding handles cases like ß that lowercasing misses, Turkish and Greek pitfalls, and spreadsheet functions.
lowercase Converter FAQ
- Will acronyms like NASA become lowercase too?
- Yes. This tool lowercases every letter, including acronyms and names. If you want normal sentence capitalization back instead, use Sentence case in the Case Converter.
- Is it safe to lowercase email addresses?
- The domain part (after the @) is not case-sensitive. The email standard, RFC 5321, says the part before the @ must be treated as case-sensitive, although it discourages relying on that — in practice most providers ignore case, but check before changing addresses you do not control.
- How are Greek and other non-Latin letters handled?
- Standard Unicode lowercasing is used, including the Greek final sigma: “ΟΔΟΣ” becomes “οδος”. Language-specific rules such as Turkish dotless ı are not applied, and the Turkish capital İ becomes an i with a combining dot.
- Can I get my original capitals back?
- Not from the lowercase text — the information is gone. If you used Replace Input with Result, Undo Replace restores the original; otherwise keep a copy before converting.
- Does it change numbers, punctuation, or emoji?
- No. Only letters change; digits, punctuation, symbols, emoji, spaces, and line breaks are left exactly as they are.
- Can I upload a Word document or PDF instead of pasting?
- Yes. Upload Document accepts .txt, .md, Word .docx, and text-based .pdf files, or you can drop a file onto the text box. The file is read in your browser — it is not sent to Looty Tools — and its text replaces whatever is in the box. Scanned PDFs without a text layer and older .doc files are not supported.
- Is anything I paste sent to Looty Tools?
- No. Lowercasing happens in your browser and the text is never uploaded or saved. Refreshing the page clears it.
