16 Free Tools

Developer Tools

Free online developer tools for JSON formatting, JWT decoding, hash generation, UUID creation, Base64 encoding/decoding, regex testing, color conversion, and more. All tools are 100% free, private, and work entirely in your browser.

JSON & YAML Tools

Format, validate and convert JSON and YAML data

JSON Formatter & Validator

Format, validate, and minify JSON data

JSON to YAML Converter

Convert JSON data to YAML format

YAML to JSON Converter

Convert YAML data to JSON format

Encoding & Decoding Tools

Encode and decode data in various formats

Base64 Encoder/Decoder

Encode and decode Base64 data

URL Encoder/Decoder

Encode and decode URL strings

HTML Encoder/Decoder

Escape and unescape HTML entities

Hash & Crypto Tools

Generate hashes and decode tokens

Hash Generator (MD5/SHA)

Generate MD5, SHA-1, SHA-256, SHA-512 hashes

JWT Decoder

Decode and verify JWT tokens

Password Strength Checker

Check password strength and entropy

UUID Generators

Generate unique identifiers

UUID v4 Generator

Generate random UUID v4 identifiers

UUID v7 Generator

Generate time-sortable UUID v7 identifiers

Bulk UUID Generator

Generate multiple UUIDs at once

Regex Tools

Test and validate regular expressions

Regex Tester

Test regular expressions with live matching

Regex Cheatsheet

Quick reference for regex patterns

Color Tools

Convert and manipulate colors

Color Converter

Convert between Hex, RGB, and HSL

Color Palette Generator

Generate harmonious color palettes

Why Use CalcBit Developer Tools?

100% Client-Side

All processing happens in your browser. Your data never leaves your device.

No Rate Limits

No usage limits, no API keys, no signup required. Use as much as you need.

Lightning Fast

Built with WebAssembly and optimized JavaScript for instant results.

Keyboard Friendly

Tab between fields, use keyboard shortcuts, and work efficiently.

Frequently Asked Questions

What are developer tools?

Developer tools are online utilities that help programmers and developers with common tasks like formatting JSON, encoding/decoding data, generating hashes, creating UUIDs, testing regular expressions, and converting between formats. These tools save time and reduce errors in development workflows.

Are these developer tools free to use?

Yes, all developer tools on CalcBit are completely free to use with no usage limits, signup requirements, or hidden charges. All processing happens in your browser.

Do these tools store my data?

No. All developer tools process data entirely in your browser. We never send your data to any server, ensuring your sensitive code, tokens, and data remain private and secure.

What is a JSON formatter used for?

A JSON formatter (or beautifier) takes minified or poorly formatted JSON data and reformats it with proper indentation, making it readable and easier to debug. It also validates whether the JSON is syntactically correct.

How does a hash generator work?

A hash generator takes input text and applies a cryptographic hash function (like MD5, SHA-1, SHA-256, or SHA-512) to produce a fixed-length string. Hash functions are one-way - you cannot reverse a hash back to the original input.

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