A modern toolbelt for developers.
Format JSON, decode JWTs, test regex, convert color spaces — and a dozen more everyday utilities. Designed to feel like one polished app, free forever and private by default.
{"name":"Aurora",
"version":"2.4.1",
"active":true,
"tags":["fast","tiny"]}"name": "Aurora",
"version": "2.4.1",
"active": true,
"tags": [
"fast",
"tiny"
]
One toolbelt for every small developer task.
Beautifully crafted utilities for the things you do every day. Free, fast, and respectful of your data.
JSON Formatter
Format, validate, and beautify JSON side-by-side.
JWT Decoder
Inspect headers, payloads, and signatures in real time.
Base64 Studio
Encode or decode text and small files instantly.
URL Encoder
Round-trip safe URL components with one click.
Regex Tester
Test patterns with live highlights and capture groups.
Color Studio
Convert between HEX, RGB, HSL, and OKLCH.
UUID Generator
Bulk-generate v4 / v7 UUIDs with copy & download.
SQL Formatter
Pretty-print SELECT, JOIN, CTE and more.
YAML ↔ JSON
Round-trip convert between YAML and JSON.
Markdown Preview
Live render with GitHub-flavored syntax.
Diff Checker
Side-by-side text and JSON diff with sync scroll.
Cron Helper
Build and explain cron schedules in plain English.
No data ever leaves your device. Every tool works offline-first.
Instant formatting, parsing and conversion — no spinners, no waits.
One coherent UI, keyboard friendly, light & dark themes everywhere.