Word Separator
ContentJoin words with hyphens, underscores, dots, or a custom separator. Apply case formatting including camelCase and PascalCase.
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About this tool
What is Word Separator?
Word Separator is a free online tool that splits text into individual words and rejoins them with a separator of your choice — a hyphen, underscore, dot, space, or any custom character. It also applies case formatting, so you can produce kebab-case slugs, snake_case identifiers, camelCase variable names, PascalCase class names, and more in a single step.
What the Tool Does
Paste any text into the input box and the tool splits it into individual words, applies the separator you choose, and formats the case accordingly. Every line in the input is treated as a separate string, which means you can convert a whole list of names, phrases, or identifiers in a single pass.
The tool is smart about what counts as a word boundary. It recognizes spaces, hyphens, underscores, and dots as separators in the input. It also detects camelCase and PascalCase patterns, splitting myVariableName into my, variable, and name before reassembling with your chosen settings.
Separator Options
Hyphen produces kebab-case output (my-variable-name), the standard for URL slugs, HTML data attributes, and CSS class names.
Underscore produces snake_case output (my_variable_name), widely used in Python, Ruby, SQL column names, and file names on Linux systems.
Dot produces dot.notation output (my.variable.name), common in configuration keys, package names, and some logging frameworks.
Space re-separates words with plain spaces, useful for cleaning up a camelCase variable name into readable prose.
None removes all separators entirely, joining words into a single continuous string.
Custom lets you type any character or sequence — an arrow, a pipe, a double dash, whatever the situation calls for.
Case Options
Alongside the separator, you can apply one of six case formats. lowercase and UPPERCASE transform every letter in every word. Title Case capitalizes the first letter of each word. camelCase lowercases the first word and capitalizes the start of each subsequent word, ignoring the separator setting since camelCase never uses one. PascalCase capitalizes every word the same way but also capitalizes the first word, also ignoring the separator. Original leaves the capitalization of each word exactly as it was in the input.
Cleanup Options
Three toggles give you control over what gets stripped before the separator is applied. Remove special characters clears punctuation and symbols, replacing them with spaces so they are treated as word boundaries rather than becoming part of the output. Remove numbers does the same for digits. Trim whitespace strips leading and trailing spaces from each line before processing, preventing empty words from appearing at the start or end of the output.
Practical Uses
The tool covers a range of everyday developer and writer tasks. Converting a page title into a URL slug takes one click. Normalizing a column of inconsistently formatted names into a consistent snake_case database schema is a matter of seconds. Turning a list of camelCase variable names back into readable English for documentation is equally quick. The swap button lets you chain transformations — send the output back to the input and apply a second round of settings without copying and pasting.
How to Use
- 1
Enter your text
Paste or type your text into the Input box. Each line is processed separately, so you can convert a whole list at once.
- 2
Choose a separator
Select Hyphen, Underscore, Dot, Space, None, or Custom. If you pick Custom, type your preferred delimiter in the field that appears.
- 3
Select a case format
Pick from lowercase, UPPERCASE, Title Case, camelCase, PascalCase, or Original. camelCase and PascalCase ignore the separator setting automatically.
- 4
Apply cleanup options
Toggle Remove special characters, Remove numbers, or Trim whitespace to clean up the input before formatting.
- 5
Copy or swap the result
Click Copy to copy the output to your clipboard, or click Swap to feed the output back as input for a second round of transformations.
Frequently Asked Questions
What is a word separator?↓
A word separator is a character placed between words to make multi-word strings readable in contexts that do not allow spaces, such as file names, URL slugs, variable names, and CSS class names.
What is the difference between kebab-case and snake_case?↓
Kebab-case joins words with hyphens (e.g. my-variable-name) and is common in URLs and CSS. Snake_case joins words with underscores (e.g. my_variable_name) and is common in Python, databases, and file names.
How does camelCase differ from PascalCase?↓
In camelCase the first word is all lowercase and subsequent words are capitalized (e.g. myVariableName). In PascalCase every word starts with an uppercase letter (e.g. MyVariableName). Both omit any separator character.
Can I process multiple lines at once?↓
Yes. Each line in the input is processed independently, so you can paste a list of phrases and get back a list of formatted strings in one step.
Does the tool handle camelCase or hyphenated input?↓
Yes. The tool automatically splits existing camelCase, PascalCase, hyphenated, underscored, and dot-separated input into individual words before applying your chosen separator and case format.