Developer & Tech Toolkit
Daily essential utilities for web developers and software engineers, running 100% client-side with zero data leaks.
About this toolkit
Format JSON, encode and decode Base64 or URLs, generate standard UUIDs, inspect code differences with text diff, and preview Markdown documentation locally with guaranteed security.
Essential Tools (12)
All tools are 100% free, require no account, and run client-side.
JSON Formatter
Format and validate JSON.
Base64 Encoder
Encode text to Base64.
Base64 Decoder
Decode a Base64 string.
UUID Generator
Unique identifiers on demand.
Text Diff
Compare two texts.
Markdown Preview
Preview your Markdown live.
URL Encoder
Encode a URL or a parameter.
URL Decoder
Decode an encoded URL.
Color Converter
HEX, RGB, HSL in sync.
Password Generator
Strong, random passwords.
Random Password
A quick, secure password.
Data Storage Converter
Bytes, MB, GB, TB.
Practical Guides & Workflows
Step-by-step best practices to get the most out of your tools.
Format and validate JSON payloads
Format, indent, and validate large JSON objects instantly with clear syntax error indicators.
Encode and decode Base64 data safely
Convert strings to Base64 or inspect tokens locally without leaking confidential API credentials.
Generate UUID v4 identifiers
Create cryptographically secure UUIDs for primary keys, API mocking, and database schemas.
Compare code changes with Text Diff
Highlight additions, deletions, and subtle modifications between code blocks side-by-side.
Frequently Asked Questions
Clear answers to common questions about this toolkit.