Code Case Converter

Convert variables, database columns, API parameters, and CSS identifiers between camelCase, PascalCase, kebab-case, and snake_case with multi-line batch support.

Character Count: 0 | Word Count: 0 | Line Count: 0
Need general prose casing? Use our standard Case Converter for Sentence case, Title Case, UPPER CASE, and Capitalized Case.
cC Code Case Converter — Clean Developer Identifier Transformation

Modern software engineering requires switching between multiple naming conventions. Python uses snake_case, JavaScript leans on camelCase, C# and React expect PascalCase, and CSS and RESTful endpoints require kebab-case. ToolCanvas provides instant, precision conversion between all four conventions with full support for multi-line lists.

Each line in your input is tokenized and transformed independently. Paste a list of 50 database column names or a TypeScript interface, click your desired casing convention, and receive a cleanly converted batch with all newlines intact. All transformations occur 100% in your browser without transmitting your proprietary code or database schemas across the internet.

How to Use the Code Case Converter

  1. Input your code identifiers or text: Paste single identifiers (e.g. user_account_balance), space-separated words (e.g. get user profile), or an entire multi-line list of database fields into the editor.
  2. Select your target programming convention: Click any of the four developer case buttons: camelCase, PascalCase, kebab-case, or snake_case.
  3. Verify the result: The editor converts every line independently, preserving your line count and indentation while transforming delimiters and letter casings.
  4. Copy or download: Click the Copy icon in the bottom toolbar to place the result on your clipboard, or click Download to save the converted list as a text file.

How Does the Identifier Tokenizer Work?

Converting programming identifiers is far more nuanced than simple string replacement. Different coding styles separate words using uppercase transitions, underscores, hyphens, dots, or spaces. ToolCanvas utilizes a specialized regex word-boundary tokenizer:

CamelCase Transition Detection: Detects boundary points between lowercase characters and subsequent capital letters (e.g. fooBar splits into foo and Bar).

Acronym Boundary Handling: Correctly isolates acronym sequences followed by a capitalized word (e.g. XMLHTTPRequest splits into XML, HTTP, and Request instead of corrupting the acronym).

Universal Delimiter Parsing: Strips hyphens, underscores, dots, and whitespace, isolating the underlying semantic words before reassembling them into your chosen target convention.

Line-by-Line Independence: By treating each line as a distinct identifier, you can convert lists of 500 database attributes in one click without them collapsing into a single run-on token.

Programming Language Naming Standards

Standard casing conventions by programming language and software framework:

JavaScript & TypeScript
  • camelCase: Variable names, object properties, and function definitions (e.g. getUserProfile, totalAmount).
  • PascalCase: Classes, interfaces, type aliases, and React components (e.g. UserProfileCard, PaymentResponse).
  • kebab-case: npm package names and CSS class selectors.
Python & Data Science
  • snake_case: Function names, methods, variables, and module filenames per PEP 8 (e.g. calculate_tax, order_id).
  • PascalCase: Class names and exception types (e.g. DatabaseConnection).
C# & .NET
  • PascalCase: Methods, public properties, classes, namespaces, and enums (e.g. CalculateTotal, CustomerAddress).
  • camelCase: Private fields (often with underscore prefix) and method parameters.
Web Standards & DevOps
  • kebab-case: CSS classes, HTML data attributes (data-user-id), REST API endpoints (/api/v1/user-settings), and Kubernetes resource names.
  • snake_case: SQL column names and PostgreSQL database tables.

The 4 Code Casing Styles Explained

  • camelCase: The first word begins with a lowercase letter, and every subsequent word starts with an uppercase letter. No spaces, hyphens, or underscores are used (e.g. userId, paymentMethodType).
  • PascalCase: Every word begins with an uppercase letter, including the very first word. No delimiters are used (e.g. UserId, PaymentMethodType). Also known as UpperCamelCase.
  • kebab-case: All words are written in lowercase and joined by single hyphens (e.g. user-id, payment-method-type). Also known as dash-case or spinal-case.
  • snake_case: All words are written in lowercase and joined by single underscores (e.g. user_id, payment_method_type). Also known as underscore_case.

Best Practices for Code Identifiers

  • Batch SQL Columns: When creating TypeScript types from SQL schemas, paste the column list directly into the editor and click camelCase for instant property names.
  • Avoid Double Delimiters: The tokenizer strips redundant underscores or hyphens (such as user__profile or order--id), producing clean single-delimiter outputs.
  • Numbers in Variable Names: Numbers attached to words (e.g. utf8Encoding or sha256Hash) are preserved without unwanted separation.

Real-World Transformation Examples

Common engineering scenarios tested across the converter:

Example 1: SQL Column to JavaScript Property
Original: user_account_id
Target: camelCase
Result: userAccountId
Note: Strips underscores and capitalizes following word tokens.
Example 2: Multi-Word Text to React Component
Original: customer billing details panel
Target: PascalCase
Result: CustomerBillingDetailsPanel
Note: Every word token starts with a capital letter with spaces removed.
Example 3: camelCase Property to RESTful URL Slug
Original: getUserOrderHistory
Target: kebab-case
Result: get-user-order-history
Note: Detects capital letter boundaries and converts them into hyphens.
Example 4: REST Endpoint to Python Method
Original: fetch-latest-analytics-report
Target: snake_case
Result: fetch_latest_analytics_report
Note: Replaces hyphens with Python-standard underscores.
Example 5: Multi-Line Database Schema Batch
Original (3 lines):
created_at
billing_address_line_1
is_active_subscription
Target: camelCase
Result: createdAt
billingAddressLine1
isActiveSubscription
Note: Converts every line independently while preserving list structure.

Why Developers Choose ToolCanvas

  • 100% Client-Side Privacy: Zero cloud transmission. Proprietary company schemas, API models, and sensitive database column names never leave your workstation.
  • Zero Latency: Runs directly inside your browser's V8 JavaScript engine for instant sub-millisecond conversions.
  • Independent Multi-Line Processing: Formats hundreds of lines in one click without merging them into a single string.
  • Clean Acronym Handling: Intelligently tokenizes uppercase abbreviations without corrupting multi-word sequences.

Supported Formats & Edge Cases

  • Supported Delimiters: Spaces, tabs, underscores, hyphens, periods, and forward slashes.
  • Mixed Casing Inputs: Handles SCREAMING_SNAKE_CASE, kebab-case, PascalCase, or ordinary English sentences.
  • Numbers & Digits: Numbers in identifiers (e.g. http2Client, v1ApiRoute) are preserved safely.
Can I convert an entire list of database columns at once?

Yes. Paste your entire schema list into the editor. ToolCanvas processes each line independently, allowing you to convert 500 column names into camelCase or snake_case in under a millisecond without losing your list formatting.

How does the tool handle acronyms like API, HTTP, or URL?

Our tokenizer recognizes acronym sequences followed by a lowercase word (such as HTTPRequest) and splits them properly into distinct tokens (Http and Request) rather than treating the whole block as an unparseable word.

Is my proprietary source code or schema data logged?

No. ToolCanvas operates under a strict client-side privacy architecture. All string processing occurs entirely in your browser's local memory. No text is sent to our servers, logged to disk, or shared with third parties.

What is the difference between camelCase and PascalCase?

In camelCase, the first letter of the first word is lowercase (e.g. userId). In PascalCase (also known as UpperCamelCase), the first letter of the first word is capitalized (e.g. UserId).

Why does CSS use kebab-case instead of camelCase?

CSS is historically case-insensitive in HTML and uses hyphens (e.g. font-size, border-radius) to improve human readability. In JavaScript, CSS properties are accessed via camelCase (e.g. style.fontSize) because hyphens are interpreted as subtraction operators.

Complementary Developer Utilities

Explore our other free developer and text editing tools:

  • Case Converter — Convert general prose between Sentence case, Title Case, UPPER CASE, and Capitalized Case.
  • Duplicate Line Remover — Deduplicate database IDs, email rosters, or list exports.
  • Text Cleaner — Strip HTML tags, remove invisible control characters, and clean messy strings.
  • Text Compare & Diff Checker — Side-by-side visual diff tool to verify code revisions and document changes.
Last reviewed: Oct 2026 | ToolCanvas Engineering Standards