Exceptions
Add names, brands, or acronyms that should always keep exactly the capitalization you type — e.g. "iPhone", "McDonald's", "SEO". These are protected in every case style, including Sentence case and Title Case. One word per entry.
What is a Upper Case to Lower Case Converter?
Typing in the wrong case is one of those small errors that quietly undermines otherwise good writing. A blog title in ALL CAPS reads as shouting. A heading with every single word capitalized at random looks careless. A paragraph pasted from a spreadsheet, a notes app, or a text message often arrives with no capitalization logic at all.
The Upper Case to Lower Case Converter fixes this in one click. Paste any text — a headline, a product description, a full paragraph — and instantly switch it between lower case, UPPER CASE, Sentence case, and Title Case. Sentence case and Title Case aren't a blunt find-and-replace: they follow the capitalization conventions used in professional editing and major style guides, including handling for the first word after a colon, minor words like "a," "the," and "of," and hyphenated compounds. The tool runs entirely in your browser using JavaScript, so nothing you type is uploaded, stored, or sent to a server — it works even on a draft you haven't published yet.
How to use the Upper Case to Lower Case Converter
- Paste or type your textDrop in a title, heading, paragraph, or anything else that needs a case fix.
- Choose a case stylePick lower case, UPPER CASE, Sentence case, or Title Case from the tabs.
- Check the result instantlyThe output updates live as you type or switch between styles — no "Convert" button to click.
- Add exceptions if neededProtect brand names, product names, or acronyms so they're never re-cased.
- Copy or downloadCopy the result to your clipboard, or download it as a plain .txt file.
Featured tools inside
Four case styles
lower case, UPPER CASE, Sentence case, and Title Case in one tool.
Editorial-grade rules
Sentence and Title Case follow real style-guide logic, not naive capitalization.
Custom exceptions
Lock in your own brand names, product names, and acronyms.
Live conversion
Results update as you type — no buttons to press, no page reloads.
Copy & download
One click to copy, or export your result as a .txt file.
100% private
Everything happens in your browser. Nothing is uploaded or logged.
Dark mode
Easy on the eyes for late-night editing sessions.
Free, no sign-up
No account, no email, no limits on how much you convert.
Who uses a case converter
- Bloggers & content writersClean up post titles and headings before publishing.
- SEO specialists & marketersFormat meta titles, ad copy, and landing page headlines consistently.
- Students & academic writersMatch title-case rules required by APA, MLA, or Chicago style.
- Social media managersFix captions pasted from other sources or written on mobile.
- Developers & UX writersStandardize button labels, headings, and interface copy.
- Editors & proofreadersQuickly normalize case across a document before final review.
- Job seekersFormat resume headings and cover letter titles correctly.
- Anyone typing in a hurryFix text typed with caps lock stuck on, or pasted from a chat.
Frequently asked questions
What's the difference between Sentence case and Title Case?
Sentence case capitalizes only the first word of each sentence, the first word after a colon, and proper nouns — everything else stays lowercase, like a normal sentence. Title Case capitalizes the first and last word plus all major words (nouns, verbs, adjectives, adverbs, pronouns), and lowercases minor words like "a," "the," "and," and short prepositions unless they're first or last.
Does this tool detect proper nouns automatically?
Not perfectly — reliable proper noun detection needs real language understanding, which no rule-based script can guarantee. That's what the Exceptions box is for: add your own names, brands, and acronyms once, and they'll always keep the exact capitalization you typed, in every case style.
Is my text stored or uploaded anywhere?
No. Every conversion happens locally in your browser using JavaScript. Nothing you type is sent to a server, logged, or stored — you can safely paste unpublished drafts.
Can I add my own brand name so it's never changed?
Yes. Type it into the Exceptions box exactly as you want it to appear and press Enter. It will then be protected across lower case, UPPER CASE, Sentence case, and Title Case conversions.
Does it work on mobile?
Yes, the tool is fully responsive and works on phones, tablets, and desktop browsers.
Is this tool free to use?
Yes, it's completely free, with no sign-up, no account, and no limit on how much text you convert.
Why is my hyphenated word capitalized differently than I expected in Title Case?
In Title Case, both halves of a hyphenated word are capitalized when the word functions as a major word (e.g., "Self-Report"), but only the first half is capitalized when it's a minor word. This follows standard style-guide conventions for hyphenated compounds.
Conclusion
Getting capitalization right shouldn't take more time than writing the sentence itself. The Upper Case to Lower Case Converter handles lower case, UPPER CASE, Sentence case, and Title Case with real editorial rules, keeps your brand names and acronyms exactly as you want them, and never sends your text anywhere. Bookmark this page and use it any time you need clean, consistent capitalization — for a blog title, a resume heading, a social caption, or anything in between.