How to use the sentence case converter
- 1 Type or paste your text into the left box, open a .txt file, or press Try an example.
- 2 Choose whether to capitalise I, keep short acronyms in capitals, and start every new line with a capital.
- 3 The result appears on the right straight away and updates as you type.
- 4 Press Copy result or Download .txt, or Use as input to keep editing.
Sentence case or title case?
Sentence case capitalises only the first word and names, which is easier to read and is used by many websites and apps for headings. Book and article titles often use title case instead, which the Title Case Converter handles. To check the length of each sentence afterwards, use the Sentence Counter.
- Check names of people and places after converting.
- Keep the acronym option on for text with NASA or UK.
- Turn on new-line capitals for lists and subtitles.
Features
Proper sentences
Capital at the start of each sentence, lowercase after.
Smart details
Capitalises I and keeps acronyms such as NASA, UK and PDF.
Line by line
Optionally starts each new line with a capital for lists.
When to use it
Fixing Caps Lock text
Turn a message typed in capitals into normal, polite text in one step. For all small letters instead, use the Lowercase Converter.
Cleaning copied text
Tidy text copied from PDFs or old documents with random capitals. Remove stray spaces afterwards with Remove Extra Spaces.
Subtitles and captions
Make subtitle lines consistent so each starts with a capital.
Headings in sentence case
Many style guides, including those for websites and apps, prefer sentence case headings to title case. For headline style, use the Title Case Converter.
Related Text tasks
Frequently asked questions
What is sentence case?
Sentence case means only the first letter of a sentence and proper nouns are capitals, and everything else is lowercase. It is how ordinary writing looks.
Does it capitalise names and places?
No tool can reliably tell which words are names. Acronyms are kept in normal sentences, but names such as London or Ahmed may need a quick manual fix afterwards.
How does it keep acronyms?
Words of two to five capital letters, such as NASA, UK or PDF, are left in capitals, as long as the sentence around them is not written in capitals. A sentence typed all in capitals is treated as shouting and fully converted.
How does it know where a sentence ends?
A new sentence starts after a full stop, question mark, exclamation mark or ellipsis followed by a space. Abbreviations like e.g. may occasionally cause an extra capital.
What is the difference between sentence case and title case?
Sentence case capitalises only the first word, while title case capitalises most words in a heading. Use the Title Case Converter for book and article titles.
Can I use it for headings?
Yes. Many modern style guides use sentence case for headings because it is easier to read. Paste each heading on its own line.
Will it change my punctuation?
No. Punctuation, spacing and line breaks are kept; only the case of letters changes.
Is my text uploaded?
No. Everything runs in your browser, so the text you paste stays on your device.
How this tool works. These text tools run entirely in your browser with plain JavaScript, so the text you paste never leaves your device and results update as you type. Each tool is tested with real text such as copied PDFs, emails, code, lists, emojis and non-English scripts before it goes live.
Built and reviewed by Hamza Farooq, founder and lead developer
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