Case Converter
Convert pasted text into uppercase, lowercase, title case, sentence case, alternating case or clean URL slug format.
Convert your text case
How the case converter works
The tool reads your text, applies the selected formatting rule and returns a converted version you can copy. Use sentence case for normal paragraphs and title case for headings, article titles and page names.
uppercase = convert every letter to capitals
lowercase = convert every letter to lowercase
sentence case = capitalise the first letter after sentence punctuation
title case = capitalise key words in a heading
slug case = lowercase text + replace spaces/symbols with separatorsFor URLs and filenames, slug mode removes most punctuation, lowercases the text and replaces groups of spaces or symbols with a hyphen or underscore.
What each case format is useful for
| Case format | Example | Useful for |
|---|---|---|
| Sentence case | This is an example sentence. | Paragraphs, emails, article copy and normal writing. |
| Title Case | How to Convert Text Quickly | Headings, page titles, article titles and labels. |
| UPPERCASE | IMPORTANT NOTICE | Short labels, warnings and emphasis. Use sparingly. |
| lowercase | simple lowercase text | Cleaning copied text, tags, usernames and simple labels. |
| Slug case | case-converter-tool | URLs, filenames and page slugs. |
When to use a case converter
A case converter saves time when copied text is in the wrong format. It is especially useful for content editors, students, marketers, developers and anyone cleaning text before pasting it into another system.
- Content editing: tidy headings, titles and pasted copy before publishing.
- SEO work: create cleaner URL slugs from page titles or article ideas.
- Forms and admin: fix text that has accidentally been typed in all caps.
- Design and mockups: standardise labels and placeholder text quickly.
Using slug case for URLs
Slug format is useful when you want a clean lowercase string for a URL, filename or internal label. For example, “Free UK Text Tools” becomes “free-uk-text-tools”.
Need to check the length too?
After converting your text, use the Character Counter to check characters, spaces, letters, numbers and lines.
Case converter FAQs
What does a case converter do?
It changes the capitalisation of your text. You can turn text into uppercase, lowercase, title case, sentence case, alternating case or slug format.
What is the difference between sentence case and title case?
Sentence case is used for normal writing where only the first word of a sentence is capitalised. Title case capitalises the main words in a title or heading.
Can I use this for URLs?
Yes. Choose slug mode to turn a phrase into a lowercase URL-style string with spaces replaced by hyphens or underscores.
Is my pasted text stored?
This tool is designed to convert text in your browser. Even so, avoid pasting highly sensitive personal, work or financial information into any online tool.