This sentence case converter changes your text into clean sentence case in one click. Paste or type your content, convert it instantly in the same text box, then copy or download the result. The tool only adjusts letter case and keeps your spacing, punctuation, numbers, emojis, and line breaks exactly as they are. It also shows live text stats, so you can track character and word counts while you edit.
How the sentence case converter works
The converter follows a simple, predictable process designed for reliable results:
- Step 1: it converts the whole text to lowercase.
- Step 2: it capitalizes the first letter at the start of the text (even if the text begins with spaces, quotes, or brackets).
- Step 3: it capitalizes the first letter after sentence-ending punctuation (., !, ?) when it is followed by whitespace.
- Step 4: it also capitalizes the first letter at the start of each new line, which helps with lists and multi-line text.
This is a best-effort sentence detection approach that stays consistent and avoids heavy language guessing.
Buttons and actions
Convert to sentence case
Converts your text using the sentence case rules above and updates the same text box. If the result would be identical (no changes are needed), the tool detects that and shows a message.
Copy text
Copies the full content of the text box to your clipboard. If the browser clipboard API is blocked or unavailable, the tool automatically uses a fallback copy method.
Download .txt
Downloads your text as a plain .txt file in UTF-8 encoding. Your exact spacing and line breaks are preserved.
Clear
Clears the text box and resets the live statistics.
Live text statistics
The stats panel updates automatically on every change, including typing, pasting, converting, copying, downloading, and clearing.
Characters
Counts every character in the text box, including letters, numbers, punctuation, symbols, spaces, and line breaks.
Characters (no spaces)
Counts characters after removing all whitespace (spaces, tabs, and line breaks). Everything else is included.
Words
Counts word-like sequences made of letters or digits. Punctuation and symbols are not counted as words. Words with an internal apostrophe are counted as one word (for example, don’t).
Sentences
Counts sentence-like segments that end with ., !, or ?. This count is best-effort and meant as a helpful estimate for typical text.
Lines
Counts lines based on line breaks. Each newline creates a new line, including empty lines. If the text box is empty, the line count is zero.
Paragraphs
Counts non-empty text blocks separated by one or more blank lines. Multiple blank lines are treated as a single separator.
Common uses
- Fix ALL CAPS or mixed-case text into readable sentences.
- Clean up copied text from PDFs, emails, or chat logs.
- Standardize formatting for blog drafts, notes, and documentation.
- Check character and word counts while you edit.
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