Free Sentence Case Converter — Fix Capitalisation Instantly Online
Convert any text to sentence case instantly with our free online tool. Perfect for fixing ALL CAPS text, inconsistent capitalisation in body copy, social media captions, UI button labels, and email content. Only the first letter of each sentence is capitalised — exactly as standard written English.
What is Sentence Case?
Sentence case is a capitalisation style where only the first letter of the first word in a sentence is capitalised, along with proper nouns and the pronoun 'I'. All other words remain in lowercase. It is the most natural-looking style and mirrors how we write regular sentences.
Example:
Input:
The Quick Brown Fox Jumps Over The Lazy Dog
Output:
The quick brown fox jumps over the lazy dog
When Should You Use Sentence Case?
| Language / Context | Usage | Example |
|---|---|---|
| Body text & paragraphs | Natural reading flow | The results were impressive. |
| Social media captions | Conversational and approachable | Here's what we built this week... |
| UI labels & buttons | Google Material Design standard | Submit form · Learn more |
| Email body copy | Professional but friendly | Hi John, your invoice is attached. |
| App notifications | Natural language | Your file has been uploaded. |
| Subheadings & section labels | Modern editorial style | How our tool works |
Sentence Case Examples — Correct vs Incorrect
| Input Text | ✅ Correct | ❌ Wrong Format |
|---|---|---|
| THE BEST WRITING TIPS | The best writing tips | the best writing tips (no capitalisation) |
| tips For Better Writing | Tips for better writing | Tips For Better Writing (title case) |
| john visited new york | John visited New York | John visited new york (proper nouns not capitalised) |
| I love writing content | I love writing content | i love writing content (capital I) |
| submit the form below | Submit the form below | Submit The Form Below |
Ready to convert your text? Use the tool at the top of this page — it's free, instant, and requires no signup.
Frequently Asked Questions
What is sentence case?
Sentence case capitalises only the first letter of the first word in a sentence, plus proper nouns and the pronoun 'I'. All other words remain lowercase. It mirrors standard written English.
When should I use sentence case instead of title case?
Use sentence case for body text, social media posts, UI labels, notifications, and conversational copy. Use Title Case for formal headlines, article titles, and headings that need more authority.
Does Google recommend sentence case for headings?
Google's Material Design guidelines recommend sentence case for UI elements and most headings in apps and web interfaces. It creates a more natural, conversational feel.
Are proper nouns capitalised in sentence case?
Yes — proper nouns (names of people, places, brands, products) are always capitalised in sentence case. Example: 'I visited New York last year.' — New York stays capitalised.
What is the difference between sentence case and lowercase?
Sentence case capitalises the first letter of each sentence and proper nouns. Lowercase converts everything to lowercase with no exceptions. They serve different purposes.
How do I convert text to sentence case?
Paste your text into the converter above and click 'Sentence case'. The tool automatically capitalises the first letter of each sentence while lowercasing all other words.