ToolkitBox

Fast, private browser tools for everyday developer work.

Data & Encoding

JSON Toolbox{ }

Format, validate, minify, compare, YAML, XML.

Base64 Tool64

Encode and decode text locally.

UUID GeneratorID

Generate identifiers for testing and builds.

Color Tool#

Convert, inspect, and compose colors.

Text, Web & Security

Regex Tester.*

Test expressions and inspect matches.

Diff Checker+-

Compare text side by side.

URL Checker://

Parse, validate, encode, and decode URLs.

SSL CheckerTLS

Inspect certificate status and expiry.

Latest guides

How to Format and Validate JSON Without Leaking API DataG

A practical guide to formatting, validating, comparing, and converting JSON safely in your browser.

Base64 Encoding: When to Use It and When Not ToG

Understand common Base64 use cases, URL-safe variants, Data URIs, and practical limits for browser-side encoding.

A Practical Guide to UUIDs for Development and TestingG

Learn where UUIDs fit, how to use them in test data, and what to avoid when generating identifiers.

How to Test Regular Expressions Before Shipping ThemG

A step-by-step workflow for testing regex patterns, capture groups, replacements, and edge cases.