Developer Tools | Dev Atlas

Local developer utilities, not navigation traps.

Each Dev Atlas page is built around a working browser-side tool, supporting examples, common error notes, and related utilities. Tool cards and category links navigate only to real pages within the site.

Use the directory to find formatters, encoders, inspectors, converters, and generators for everyday debugging tasks. The tools are designed to keep pasted input in the browser whenever possible.

How the tools fit together

Most debugging sessions use more than one representation of the same value. An API issue might start with formatted JSON, continue with a decoded JWT, require timestamp conversion, and end with URL-safe examples for a ticket or test case.

Dev Atlas groups these workflows so related tools and guides are easy to reach from each page. Start with the value you need to understand, then follow the related links when the next suspicious detail appears.

Formatters

Clean up structured data, stylesheets, and code snippets.

JSON Formatter

Format, minify, sort, inspect, and validate JSON locally with readable parsing feedback.

CSS Minifier

Format and minify CSS snippets locally for quick cleanup and debugging.

JavaScript Minifier

Format and minify JavaScript snippets locally for fast inspection.

Encoders

Encode and decode common web-safe text formats.

Base64 Encoder

Encode UTF-8 text to Base64 and decode Base64 strings locally.

URL Encoder

Encode and decode URL components for paths and query strings.

HTML Entity Encoder

Escape HTML-sensitive characters and decode HTML entities.

Security and Inspectors

Inspect tokens, patterns, hashes, and schedules.

JWT Decoder

Decode JWT header and payload locally, including issued-at, not-before, and expiration status.

Regex Tester

Test JavaScript regular expressions, inspect matches, and highlight matched text locally.

Hash Generator

Generate MD5, SHA-1, and SHA-256 hashes from local text input.

Cron Parser

Parse five-field cron expressions and preview the next five local run times.

Converters

Move between common data formats, time values, and colors.

Timestamp Converter

Convert Unix seconds, Unix milliseconds, ISO strings, local time, and UTC time.

Color Converter

Convert HEX, RGB, and HSL colors, preview values, and copy each format.

Generators

Create development identifiers and fixture values.

UUID Generator

Generate random UUID v4 values for test data and local identifiers.