Uppercase First Letter

Online tool for capitalizing the first letter of sentences after periods, questions, exclamations, and ellipses.

Обработка выполняется локально в браузере. Данные не отправляются на сервер.

For this tool, processing runs locally in your browser and data is not sent to the server.

Uppercase First Letter is a free online tool for capitalizing the first letter of each sentence and quickly cleaning text from chats, notes, emails, posts, descriptions, and documents. Processing runs locally in your browser and data is not sent to the server.

What it does

Output

Processing

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How to use

Paste text from a chat, email, note, post, description, or document.
Choose a mode: first letter of sentences, each line, or after line breaks.
Configure which punctuation marks end a sentence and enable protection for abbreviations, URLs, email, and numbers.
Copy the corrected text for a message, publication, CMS, email, or document.

More about this tool

This tool capitalizes the first letter of each sentence and helps quickly clean text from chats, notes, emails, posts, descriptions, and documents. It recognizes periods, question marks, exclamation marks, and ellipses, and can protect abbreviations, email, URLs, domains, decimal numbers, and inline code. The tool does not rewrite text or change the case of all words — it fixes sentence starts only.

Runs in the browser
Data is not sent to the server
Capitalizes the first letter of sentences
Useful for text from chats, emails, and notes
Recognizes periods, questions, exclamations, and ellipses
Protects URLs, email, abbreviations, and numbers
Does not change the case of the entire text
No registration required

Frequently Asked Questions

How do I capitalize the first letter of sentences?

Paste text into the input field and the tool capitalizes the first letter of each sentence according to the selected rules.

Which punctuation marks end a sentence?

By default, periods, question marks, exclamation marks, and ellipses are recognized. These rules can be configured.

Does the tool change the case of the entire text?

No. The service only capitalizes the first letter of sentences and does not lower-case the rest of the letters.

What happens to abbreviations like "i.e." and "etc."?

When protection is enabled, such abbreviations are not treated as sentence endings, so the text is not split in the wrong places.

Are URLs and email changed?

No, if URL, email, and domain protection is enabled. This helps avoid breaking technical strings and links.

Can I capitalize the first letter of each line?

Yes. For lists and multiline text, choose the "First letter of each line" mode.

Does the tool fix grammar and punctuation?

No. The tool does not check grammar or fix punctuation. It works with the first letter of sentences or lines only.

Is my data sent to the server?

No. Text is processed locally in your browser and is not sent to the server.

Do I need to register?

No. The tool works immediately and does not require registration.

How to use

Paste text from a chat, email, note, post, description, or document.

Choose a mode: first letter of sentences, each line, or after line breaks.

Configure which punctuation marks end a sentence and enable protection for abbreviations, URLs, email, and numbers.

Copy the corrected text for a message, publication, CMS, email, or document.

More about this tool

Runs in the browser
Data is not sent to the server
Capitalizes the first letter of sentences
Useful for text from chats, emails, and notes
Recognizes periods, questions, exclamations, and ellipses
Protects URLs, email, abbreviations, and numbers
Does not change the case of the entire text
No registration required

Frequently Asked Questions

How do I capitalize the first letter of sentences?

Paste text into the input field and the tool capitalizes the first letter of each sentence according to the selected rules.

Which punctuation marks end a sentence?

By default, periods, question marks, exclamation marks, and ellipses are recognized. These rules can be configured.

Does the tool change the case of the entire text?

No. The service only capitalizes the first letter of sentences and does not lower-case the rest of the letters.

What happens to abbreviations like "i.e." and "etc."?

When protection is enabled, such abbreviations are not treated as sentence endings, so the text is not split in the wrong places.

Are URLs and email changed?

No, if URL, email, and domain protection is enabled. This helps avoid breaking technical strings and links.

Can I capitalize the first letter of each line?

Yes. For lists and multiline text, choose the "First letter of each line" mode.

Does the tool fix grammar and punctuation?

No. The tool does not check grammar or fix punctuation. It works with the first letter of sentences or lines only.

Is my data sent to the server?

No. Text is processed locally in your browser and is not sent to the server.

Do I need to register?

No. The tool works immediately and does not require registration.