Fast local utilities for everyday developer debugging.
Dev Atlas starts with practical browser-side tools for everyday development tasks. Paste data, inspect it, copy the result, and keep moving.
JSON Formatter
Format, minify, and validate JSON with readable parsing feedback for quick debugging.
Encode + decodeBase64 Encoder
Encode text to Base64 and decode Base64 strings locally in your browser.
URL safeURL Encoder
Encode and decode URL components for query strings, paths, and debugging.
Local decodeJWT Decoder
Decode JWT header and payload locally, then inspect issued-at and expiration timestamps.
Generate IDsUUID Generator
Generate random UUID v4 values for fixtures, test data, and local identifiers.
MD5 + SHAHash Generator
Generate MD5, SHA-1, and SHA-256 hashes from local text input.
Unix + ISOTimestamp Converter
Convert Unix seconds, Unix milliseconds, ISO strings, local time, and UTC time.
Pattern testRegex Tester
Test JavaScript regular expressions and inspect matches against sample text.
HEX + RGB + HSLColor Converter
Convert common CSS color formats and preview the resulting color.
Small tools for the debugging work developers repeat every day.
Dev Atlas focuses on focused utilities for inspecting structured data, encoded values, identifiers, timestamps, schedules, hashes, colors, and regular expressions. Each tool is designed for quick browser-side use without accounts, dashboards, or project setup.
Inspect API data
Format JSON, decode JWT payloads, convert timestamps, and check encoded URL or Base64 values while debugging integrations.
Prepare test values
Generate UUIDs, hashes, formatted snippets, and converted color values for fixtures, docs, examples, and local testing.
Keep sensitive input local
Tool processing happens in the browser whenever possible, which keeps everyday debugging input away from server-side conversion APIs.
Learn the concepts behind the tools.
The developer guides explain common mistakes such as invalid JSON syntax, JWT trust assumptions, Unix seconds versus milliseconds, Base64 confusion, URL encoding edge cases, regex flags, hash algorithm choices, cron schedules, CSS color formats, and UUID usage.
Debug API issues with a repeatable checklist.
When an API response looks wrong, start by preserving a safe sample, formatting the payload, checking token claims, converting time fields, and normalizing encoded values. Dev Atlas keeps these inspection steps close together so developers can move from a confusing response to a clear bug note.
Read the response
Format JSON, decode HTML entities, and reduce large payloads into safe examples that still show the failing shape.
Check assumptions
Decode JWT claims, compare Unix seconds and milliseconds, and verify URL or Base64 encoding before changing application code.
Share safely
Replace secrets and personal data with synthetic values, then include the exact status, request shape, and formatted response.
Tool input is processed locally whenever possible.
Dev Atlas focuses on browser-side utilities for common development tasks. Learn how local processing works, what third-party services may receive, and how to contact the site owner.