Text ToolsSentence Case Fixer
Fix incorrect sentence capitalization with proper sentence starts and noun handling
Usage Tips
- The tool automatically processes text as you type or paste it
- Enable Preserve Acronyms to keep all-caps acronyms like NASA, FBI, or HTML
- Enable Preserve Proper Nouns to maintain capitalization of days, months, and common proper nouns
- The pronoun "I" is always capitalized regardless of settings
- Sentence boundaries are detected by periods, exclamation marks, and question marks
- Works best with English text; may need manual review for other languages
Related Tools
About Sentence Case Fixer
How It Works
- Automatically capitalizes the first letter of each sentence
- Detects sentence boundaries (periods, exclamation marks, question marks)
- Preserves common acronyms like NASA, FBI, USA when enabled
- Maintains proper noun capitalization (days, months, languages) when enabled
- Always capitalizes the pronoun "I"
- Converts everything else to lowercase for consistent formatting
Common Use Cases
- Fixing text copied from all-caps sources
- Correcting inconsistent capitalization in documents
- Standardizing text from multiple authors
- Cleaning up social media posts for professional use
- Preparing text for publication or formal communication
- Converting casual chat messages to proper sentences
Frequently Asked Questions
What does the Sentence Case Fixer tool do?
The Sentence Case Fixer automatically corrects capitalization in your text by ensuring that each sentence starts with a capital letter, preserves common proper nouns (like days of the week and months), and maintains acronyms. It converts the rest of the text to lowercase for consistent, professional formatting.
How does the tool detect sentence boundaries?
The tool identifies sentence boundaries by looking for common sentence-ending punctuation marks: periods (.), exclamation marks (!), and question marks (?). It then capitalizes the first letter after each of these punctuation marks, accounting for any whitespace.
What acronyms does the tool preserve?
When "Preserve Acronyms" is enabled, the tool automatically detects and preserves any sequence of two or more consecutive uppercase letters (e.g., NASA, FBI, HTML, CSS, API, USA). This ensures that important acronyms maintain their standard all-caps formatting.
Which proper nouns are automatically preserved?
The tool preserves common proper nouns including days of the week (Monday-Sunday), months of the year (January-December), major languages (English, Spanish, French, etc.), continents, and some religious terms. The pronoun "I" is always capitalized regardless of settings.
Can I disable acronym and proper noun preservation?
Yes, both features can be toggled on or off using the checkboxes in the tool. If you disable "Preserve Acronyms," all acronyms will be converted to lowercase except for the first letter if they start a sentence. Similarly, disabling "Preserve Proper Nouns" will convert all words to standard sentence case without special handling for proper nouns.
Does the tool work automatically or do I need to click a button?
The tool processes your text automatically as you type or paste it into the input field. Changes to the preservation options (acronyms and proper nouns) are also applied immediately. There's no need to click a "Convert" or "Fix" button - the results appear instantly.
How do I copy the fixed text?
Once your text is processed, you can click the "Copy" button located at the top-right of the output section. This will copy the entire fixed text to your clipboard, ready to paste anywhere you need it.
What happens to text that is already correctly capitalized?
The tool will still process correctly capitalized text to ensure consistency. If your text already follows proper sentence case rules and includes preserved acronyms/proper nouns where appropriate, the output will be nearly identical to the input.
Can this tool fix all-caps text?
Yes! The Sentence Case Fixer is excellent for converting ALL-CAPS text (shouting text) into properly formatted sentence case. It will convert everything to lowercase first, then apply proper capitalization rules for sentence starts, proper nouns, and acronyms based on your settings.
Does the tool work with multiple paragraphs?
Yes, the tool processes all text in the input field, including multiple paragraphs. Each sentence in every paragraph will be properly capitalized according to the rules, maintaining the paragraph structure and line breaks from your original text.
Will the tool work correctly with languages other than English?
The tool is primarily designed for English text and uses English-specific rules for proper nouns and common words. While it will apply basic sentence capitalization to text in other languages, the proper noun preservation may not work as expected. For best results with non-English text, you may want to disable the "Preserve Proper Nouns" option.
What should I do if the tool capitalizes something incorrectly?
While the tool handles most common cases correctly, you may occasionally need to make manual adjustments, especially for specialized terms, brand names, or unusual proper nouns not in the common list. Simply copy the fixed text and make any necessary corrections in your text editor or word processor.