Sentence Case Converter — Free, Instant, No Signup

Sentence case means the first letter of the first word is capitalized, and everything else stays lowercase — unless it's a proper noun. "The quick brown fox" is sentence case. It's the default style for most writing: emails, blog posts, research papers, and anywhere you want text to read naturally.

Paste your text into our free case converter, click "Sentence case," and you're done in one second. No signup, no install, runs entirely in your browser.

What Sentence Case Actually Means

Sentence case capitalizes only the first word of a sentence (and proper nouns). Compare these:

Style	Example
Sentence case	How to write a cover letter
Title Case	How to Write a Cover Letter
UPPERCASE	HOW TO WRITE A COVER LETTER
lowercase	how to write a cover letter

Sentence case is the default for running prose, email body text, and most digital content. It reads naturally because it matches how we read sentences — one capital at the start, then a flow of lowercase. Title Case, by contrast, makes every word visually prominent, which works for headings and headlines but feels heavy in body text.

When Sentence Case Is the Right Choice

Use sentence case in these situations:

• Email subject lines — Most email clients render sentence case subject lines as more personal and conversational than title case. "Your order has shipped" reads more naturally than "Your Order Has Shipped."
• APA citations — APA 7 style uses sentence case for article and book titles in reference lists. "A meta-analysis of reading interventions" is correct APA. "A Meta-Analysis of Reading Interventions" is not.
• Blog post headings (H2, H3) — Many style guides (including Google's Material Design) recommend sentence case for UI labels and headings because it reduces visual noise.
• Social media captions — Conversational platforms like LinkedIn and Twitter feel more natural with sentence case.
• Product descriptions — Body copy in e-commerce descriptions uses sentence case for readability.

The main exception is when your style guide or brand voice specifically calls for title case — some companies standardize on title case for all headings, and that's a valid choice too.

Sentence Case vs Title Case — The Short Version

The most common confusion is whether to use sentence case or title case for headings. Here's the quick answer:

• Blog post titles: Either works, but pick one and stay consistent. AP Style tends toward title case; most tech companies use sentence case.
• Email subjects: Sentence case feels more human.
• APA paper titles in references: Sentence case (APA 7 rule).
• MLA paper titles: Title Case.
• Navigation menus and buttons: Sentence case for most SaaS products; title case for traditional publishing sites.

The real rule is consistency. Mixing the two in the same document or website is more jarring than choosing either one. Our sentence case vs title case guide covers this in detail if you need to make a definitive choice for a project.

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APA Sentence Case — What Students Get Wrong

APA 7 style has specific sentence case rules for reference list entries. Here's the exact standard:

• Capitalize the first word of the title.
• Capitalize the first word after a colon or em dash in the title.
• Capitalize proper nouns (names of people, places, organizations, theory names like "Bayesian").
• Everything else stays lowercase — even the second word of a hyphenated compound.

Example: The psychological impact of social media on adolescent self-esteem: A meta-analysis

Students commonly make the mistake of capitalizing every major word (title case) or copying the original publication's all-caps title directly. Neither is correct APA.

Our tool applies sentence case instantly. Paste a title that's in UPPERCASE or Title Case, click "Sentence case," and you'll get the correct lowercase result — then manually capitalize any proper nouns if needed.

How to Convert Text to Sentence Case in 3 Seconds

Using our free case converter:

1. Open the free case converter tool.
2. Paste your text into the text box.
3. Click the "Sentence case" button.
4. Click "Copy" to copy the converted text.

That's it. The tool handles the conversion in your browser — nothing is sent to a server. You can paste anything: a single headline, a full paragraph, a list of APA references, an email subject line, a product description. All of it processes instantly regardless of length.

If you need to convert a large batch — like 50 APA reference titles — paste them all at once. The tool handles multiple sentences and applies sentence case to each one.

Four Sentence Case Mistakes to Avoid

Even people who understand sentence case make these errors:

• Capitalizing after a semicolon. Sentence case only capitalizes after a period, exclamation mark, or question mark. After a semicolon, stay lowercase: "This is the result; it confirms the hypothesis."
• Forgetting proper nouns. An automated tool converts everything to lowercase (except the first word). You still need to manually fix names: "the study was conducted in new york" should be "...in New York."
• Treating colons differently in APA. In APA format specifically, capitalize the first word after a colon in a title. Many other style guides do not require this.
• Mixing with title case mid-document. If you decide to use sentence case for headings, use it for all headings. Inconsistency undermines readability more than either choice alone.

Frequently Asked Questions

What is sentence case?

Sentence case capitalizes only the first letter of the first word in a sentence (and proper nouns). All other words stay lowercase. Example: "How to write a cover letter" — not "How To Write A Cover Letter."

Is sentence case the same as lowercase?

No. Lowercase converts everything to no capitals at all. Sentence case keeps the first word capitalized and treats proper nouns correctly. "the meeting is on monday" is lowercase. "The meeting is on Monday" is sentence case (Monday is a proper noun).

Does APA use sentence case or title case?

APA 7 uses sentence case for article and book titles in reference lists. Use title case only for journal names and publication names. This is a frequent source of confusion for students.

Can I convert multiple sentences at once?

Yes. Paste your full paragraph, list, or block of text and the tool applies sentence case to each sentence. It recognizes periods, exclamation marks, and question marks as sentence boundaries.

Does the tool handle proper nouns automatically?

The tool capitalizes the first word of each sentence. Proper nouns in the middle of sentences will be lowercased by the conversion — you will need to manually re-capitalize names, cities, organizations, and other proper nouns after converting.