four tools · zero uploads
Dev tools that live in
your browser tab.
Decode a JWT. Hash some text. Peek at what websites store about you. Diff two JSON files. All local, all instant, nothing sent anywhere.
01 · jwt inspector
See what's really
inside a token.
Paste any JWT and watch it split apart into colour-coded header, payload, and signature. Every claim gets explained — and the expiry badge counts down live, so exp finally means something.
- Header, payload & signature decoded side by side
- Time claims translated to plain-language dates
- Standard vs. custom claims tagged at a glance
02 · hash generator
Type anything.
Get four digests.
The SHA family, computed by your browser's own Web Crypto engine. Paste a known digest underneath and the compare bar tells you instantly whether it matches.
- SHA-1, SHA-256, SHA-384 and SHA-512 in one pass
- Match-check against any reference hash
- One-click copy on every digest row
03 · storage manager
X-ray for
web storage.
Websites quietly tuck data into localStorage and sessionStorage all the time. This lays it out in the open — add keys, edit values, export a snapshot, wipe it clean.
- Live table of every stored key–value pair
- Edit in place, delete, or clear everything
- Download any storage as a .json snapshot
04 · json diff
Two JSONs walk in.
Every change walks out.
Drop a before and after into the panels. Added keys glow green, removed ones red, changed values amber. Invalid JSON? You get the exact parser error, not a vague shrug.
- Nested objects and arrays compared recursively
- Added / removed / modified highlighted by colour
- Precise, panel-specific validation errors
Built to stay local.
ready when you are
Pick a tool
and poke it.
The fastest way to understand a JWT is to break one open.
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