ABOUT justkit

# WHO

JustKit is built by AuvaLabs, a small studio that ships bookmark-worthy reference sites. Sister to JustCalc (global utility calculators) and GulfCalc (UAE-specific). Same philosophy across all three: tools that respect your time and your data.

# WHAT

25 client-side developer tools, including JSON formatting, JWT decoding, regex testing, Base64, UUIDs, hashes, timestamps, color conversion, Markdown, QR codes, CIDR, text diffing, image-to-Base64, favicons, DNS, RDAP, HTTP headers, and TLS certificate checks. Plus 5 long-form explainers in /learn.

# WHY

JustKit keeps small development tasks small. Open the tool, paste or type the input, copy the result, and close the tab. There is no account or setup step.

# HOW // technical

• Static HTML + a single ~30 KB CSS file + per-page inline JavaScript.
• No frameworks. No build step. No npm install required to read the source.
• Every tool runs in your browser. Network tab shows zero requests after page load.
• No fingerprinting, no cookies beyond traffic-stats beacons (see privacy). localStorage only - and only when you opt in by interacting.
• Hashes computed via the Web Crypto API. JWT parsed via vanilla atob + JSON.parse. Standards-compliant per RFC 7519, RFC 4648, RFC 9562.
• Served from Cloudflare. Standard request logs only - never exported, never analysed.

# DISCLAIMER

JustKit is a reference toolset. Output is accurate to the standard cited. For production cryptographic operations, prefer libraries audited by your security team over any client-side web tool, including this one.

# CONTACT

Spotted a bug, want to suggest a tool, or have feedback? Email [email protected].