ConvertCase.co

Snake Case Converter

Converts text to snake_case. Words are in lowercase and separated by an underscore.

Characters: 0Words: 0Sentences: 0Lines: 0Paragraphs: 0

What Is Snake Case?

Snake case is a text format where all words are in lowercase and separated by underscores. It’s widely used in programming — especially in Python — to name variables, functions, and constants in a readable and consistent way. The name comes from the visual “slither” of underscores between words.

Input:
convert this sentence to snake case

Output:
convert_this_sentence_to_snake_case

When Should You Use Snake Case?

  • ✔️ For naming variables and functions in Python, Ruby, and similar languages
  • ✔️ To format configuration keys and file names
  • ✔️ When working with JSON or API field names
  • ✔️ To ensure readability in code where spaces aren't allowed

Why Use This Tool?

  • ✔️ Converts your text instantly into clean, consistent snake_case
  • ✔️ Saves time formatting code manually
  • ✔️ Perfect for developers, technical writers, and DevOps teams
  • ✔️ Handles Unicode characters, numbers, and punctuation properly

How Is It Different from Kebab Case?

Snake case uses underscores (_) to separate words, while kebab case uses hyphens (-). Snake case is more common in codebases, whereas kebab case is typically used for URLs and class names in web development.

Snake Case: file_upload_path
Kebab Case: file-upload-path

Pro Tip 💡

In Python, use snake_case for functions and variables, and UPPER_SNAKE_CASE for constants — this improves readability and aligns with the PEP 8 style guide.

How to Use Case Converter

Easily convert your text into various case formats, including UPPER CASE, lower case, Sentence case, and more with ConvertCase.co.

  1. Start typing or paste your text into the provided text area.
  2. Use the Open file button if you want to load text directly from a file.
  3. Select the desired case format (e.g., Sentence case, UPPER CASE, camelCase) from the available options.
  4. Your text will automatically convert to the chosen case format.
  5. Click the Copy button to copy the formatted text to your clipboard.
  6. Click Download to save your converted text as a file.
  7. Use the Clear button to reset the text area and start over.

Why Choose ConvertCase.co?

Whether you're writing blog posts, coding, formatting documents, or just need quick text transformations, ConvertCase.co offers a powerful, all-in-one toolkit designed to save you time and effort.

Key Features:
  • 15+ Case Converters – Instantly switch between Sentence Case, UPPER CASE, camelCase, snake_case, PascalCase, Hashtag Case, and more.
  • Fast and Lightweight – Everything runs in your browser with no lag, loading bars, or page refreshes.
  • Easy Text Input – Type directly, paste from clipboard, or upload supported file types like .txt, .md, or .json.
  • Quick Export Options – Copy to clipboard or download your edited text instantly as a file.
  • User-Friendly UI – Clean, minimal interface designed for writers, developers, students, teachers, and everyday users alike.
  • 100% Free to Use – No registration, subscriptions, or limits — just open and use.
  • Dark Mode Friendly – Enjoy a comfortable reading experience whether you’re working day or night.