Skip to content
DevToolKits.app
Text tools

Case Converter

Type an identifier or phrase to see it converted to camelCase, PascalCase, snake_case, kebab-case, and every other common case style at once. Paste a whole list to convert many lines in bulk.

Everything runs locally in your browser — nothing you type is ever sent to a server.

Guide: How to use & features

  • Type a single identifier or phrase into "Quick convert" to see all 9 naming styles at once.
  • Each row has its own "Copy" button so you can grab just the style you need.
  • "Bulk convert" lets you paste a multi-line list and convert it all to one chosen style at once.
  • Bulk mode is handy when you need to align JSON keys or a CSV header row to a different naming convention.

FAQ: FAQ

  • How are identifiers with digits (e.g. item2Name) split?

    A digit stays attached to whatever word it was already part of. "item2Name" splits into "item2" and "Name", and "base64Encode" splits into "base64" and "Encode" — digits are never pulled out as their own word.

  • Are acronyms like HTTP or URL handled correctly?

    Yes. A run of uppercase letters like "HTTPServerError" is split right before the next capitalized word begins, so it's recognized as three words: "HTTP", "Server", "Error".

  • What's the difference between "Quick convert" and "Bulk convert"?

    "Quick convert" takes one identifier and shows all 9 naming styles at once, useful for comparing styles side by side. "Bulk convert" takes a multi-line list and converts every line to one style you pick — useful for converting a whole set of JSON keys or a CSV header row at once.

  • Does it support non-Latin text, like Japanese or Chinese?

    It can split on explicit separators (spaces, underscores, etc.) in any script, but the automatic camelCase/PascalCase word-boundary detection (based on uppercase/lowercase transitions) assumes Latin letters. Non-Latin identifiers split correctly as long as they already use spaces or punctuation as separators.

Use cases: Common use cases

  • Converting naming conventions across languages

    Bridge the gap between a database column name (snake_case) and a JavaScript/TypeScript variable name (camelCase), or any other language/framework naming mismatch.

  • Bulk-converting JSON keys or CSV headers

    Paste a whole list of API response keys or a CSV header row and convert them all to a different naming convention at once with bulk mode.

  • Generating environment variable or constant names

    Type a setting name once and instantly see its CONSTANT_CASE env-var form and kebab-case CLI-flag form side by side.

  • Sanity-checking naming during code review

    Compare an existing variable name against the "correct" conversion to quickly spot naming-convention drift.

Notes: Notes & limitations

  • Word splitting is fully automatic

    Word boundaries are inferred from upper/lowercase transitions and separators. Special proper nouns like "iOS" or "macOS" may not split the way you expect, so always review the result visually.

  • Digits never become their own word

    "item2Name" is treated as two words, "item2" and "Name" — there is no way to pull the digit out into its own "item", "2", "Name" split.

  • No automatic word-boundary detection for non-Latin scripts

    Identifiers in Japanese, Chinese, and similar scripts only split correctly where an explicit separator (space, underscore, etc.) is present.

Quick convert

Style Result  
camelCase helloWorld —
PascalCase HelloWorld —
snake_case hello_world —
CONSTANT_CASE HELLO_WORLD —
kebab-case hello-world —
dot.case hello.world —
path/case hello/world —
Title Case Hello World —
Sentence case Hello world —

Bulk convert

Stay within DevToolKits with shortcuts to the most-used utilities across the site.

Articles
1
Article Index
AI & LLM
3
AI Rules Generator LLM Token Counter LLM API Cost Calculator
Development & DevOps
8
GitHub Actions Visualizer SQL Formatter Visual SQL Builder SQL → ER Diagram Curl Converter Chmod Calculator Cron Editor & Parser Infrastructure Diagram Builder
Data Conversion & Schemas
6
JSON Formatter JSON → TypeScript JSON → Zod JSON → OpenAPI JSON ⇔ YAML CSV ⇔ JSON Converter
Security & Cryptography
5
Base64 / 58 / 32 JWT Tool Hash & HMAC Generator JWKS Generator UUID Generator
Text & Code Helpers
5
Markdown Table Generator Text & Code Suite Regex Tester Diff Viewer Case Converter
URL, QR & Network
5
URL Encode / Decode IP / CIDR Calculator URL Params → JSON QR Generator QR Reader
Design & UI
2
Color Utility Favicon Generator
Date & Time
3
Time Zone Converter Time Units UNIX Timestamp Converter