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Tool Category Map

A quick view of the 28 tools grouped by category. Click a bar to filter tools.

Count words, chars, reading time

UPPER, lower, camelCase & more

Lorem Ipsum Generator

Generate placeholder text

Flip text chars or words

Beautify & validate JSON

Encode or decode Base64

Encode/decode URL strings

Escape HTML entities

Test regex patterns live

MD5, SHA-256, SHA-512

Color Converter

HEX, RGB, HSL, CMYK

CSS Gradient Maker

Build gradients visually

Password Generator

Cryptographically strong

Length, weight, temp, speed

Exact age in years/days

Body mass index checker

Random Number Gen

Generate random numbers

Meta Tag Generator

OG, Twitter, SEO tags

Timestamp Converter

Unix ↔ readable date

Decode JWT header & payload

Random UUID v4 in bulk

Compare two texts line by line

SEO-friendly URL slugs

Latest practical guides

Short explainers for the problems people search before opening a tool.

All guides →

Text Title Case vs Sentence Case Know which style to use in headings, buttons, filenames and code. Developer URL Encoding Query Parameters Fix broken links with spaces, ampersands, hashes and Unicode. Math Unit Conversion Formulas Convert metric, imperial, temperature and speed without guessing. Health BMI Formula Metric and Imperial Calculate adult BMI and understand why it is only a screening number. Finance Loan Payment Formula Estimate monthly payment, total interest and full repayment cost. Developer Convert JSON to CSV Prepare JSON arrays for Excel, Google Sheets and database imports.

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Free Online Tools for Developers & Productivity

ToolZone is a curated collection of 28 free online tools for developers, designers, writers, and everyday productivity. Every tool runs entirely in your browser — no signup, no uploads. Your tool input never leaves your device.

Format and validate JSON, generate strong passwords, encode and decode Base64 or URLs, test regular expressions, convert colors, build CSS gradients, calculate BMI or age, generate Lorem Ipsum, hash text with MD5 or SHA-256, and more — all from a single fast, private, dark-themed workspace.

Whether you're a developer needing quick utilities, a designer working with colors and gradients, or a writer counting words and characters, ToolZone gives you instant, low-clutter access to professional-grade web tools that work offline once loaded.

Free Case Converter — Change Text Case Instantly

Switch any text between eight common cases — UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case and kebab-case — in a single click. Ideal for developers naming variables, writers formatting headlines and anyone cleaning up messy copy.

Features

8 case styles in one tool
One-click copy of the result
Works on long documents — no character limit
Runs locally, your text stays private

How to use

Step 1. Paste your text in the input box.
Step 2. Click the case style you want.
Step 3. Click Copy to grab the converted text.

Real use case: importing a 400-row product spreadsheet into a database

A developer receives a spreadsheet where column headers were typed by hand: "Product Name", "SKU code", "Unit Price (USD)". The target Postgres table needs snake_case identifiers, and the front-end TypeScript interface needs camelCase properties for the same fields.

Rather than renaming 40 headers twice by hand, the developer pastes the column list, converts it once to snake_case for the migration, then converts the same list to camelCase for the interface. Two clicks replace twenty minutes of error-prone typing — and typos in identifiers are exactly the kind of bug that only surfaces in production.

How Case Converter works

The converter first normalises your input into words. It splits on spaces, hyphens, underscores and camelCase humps (a lowercase letter followed by an uppercase letter), so "myVariable-name_here" becomes the word list [my, variable, name, here] regardless of the original style.

Each target style is then a pure recombination of that word list: snake_case joins with underscores in lowercase, kebab-case with hyphens, camelCase lowercases the first word and capitalises the rest, PascalCase capitalises all of them, and Title Case keeps the spaces.

Casing uses the browser's Unicode-aware toLocaleUpperCase/toLocaleLowerCase, so accented Latin, Greek and Cyrillic characters convert correctly instead of being stripped. Everything happens locally — the text never leaves the tab.

Case Converter vs similar tools

Case conversion also exists elsewhere; here is where each option fits:

Tool	How it works	Trade-off
Editor commands (VS Code, Sublime)	Keyboard shortcuts for upper/lower/title case on a selection.	Rarely support camelCase or snake_case without installing an extension.
Spreadsheet formulas (UPPER, PROPER)	Formula per cell, recalculated with the sheet.	No programming-style cases, and PROPER capitalises after every punctuation mark.
ToolZone Case Converter	Eight styles including camelCase, PascalCase, snake_case and kebab-case, applied to a whole block at once.	It converts text you paste in; it does not edit files in place.

Frequently Asked Questions

What is camelCase vs PascalCase?

camelCase starts with a lowercase letter (myVariableName); PascalCase capitalises every word including the first (MyVariableName).

Does it handle accented characters?

Yes — case conversion uses native JavaScript Unicode rules, so é becomes É correctly.

Related Text tools

Guides worth reading

Browse all ToolZone guides →