Developer Tools

Small tools for the parts of a dev's day that shouldn't need a tab full of ads.

JSON formatting, JWT decoding, hashing, encoding, and the other five-second jobs you reach for daily — free, no signup, and processed entirely in your browser. Nothing you paste here is ever sent to a server.

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input.json

{
  "tool": "json-formatter",
  "runsOn": "your device",
  "uploaded": false,
  "signupRequired": false,
  "categories": 11,
  "tools": 27
}

Valid JSON — formatted in 4ms

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JSON Formatter & Validator

Beautify, validate, and catch syntax errors in JSON with inline highlighting — the tool that anchors the whole hub, and the template every other tool page follows: a real explanation, a worked example, and no server round-trip.

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1{ "status": "invalid", "line": 4 }
2↳ Unexpected token '}' at position 41
3↳ Fix suggested: remove trailing comma

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Each tool ships with a real explanation of the mechanism behind it — not filler. These land alongside the tools themselves.

How this hub works

Everything runs in your browser

JSON, JWTs, hashes, and text never leave your device. There's no upload step and no server copy to worry about — the same architecture as the rest of Nesake's tools.

Honest about what's live

A tool only gets a "live" badge once it's actually usable. Everything else is marked "in development" — we don't pad the catalogue with placeholders.

Built to grow

New categories — API testing, GraphQL, DNS, cron, color tools — slot in without a rebuild. Bookmark a favorite and it'll be here next time.