hyperm/json

Small tools for the debugging you do ten times a day — planned to run entirely in your browser.

{"id":4182,"status":"active","tags":["beta"],"limits":{"rps":20}}

{
  "id": 4182,
  "status": "active",
  "tags": ["beta"],
  "limits": { "rps": 20 }
}

✓ valid · 74 B → 92 B

Static preview of the planned interface. The tool does not run on this page yet.

Planned tools

/json
Format, validate and diff JSON with line-and-column errors.
/jwt
Decode a token’s header and claims locally; verification is explicit.
/time
Convert Unix timestamps, ISO dates and time zones side by side.
/regex
Test expressions against sample text with match groups shown.
/url
Parse, encode and decode URLs and query strings.
/base64
Encode and decode text and files without leaving the tab.

Your input stays in the tab

Tokens, logs and payloads often contain secrets. The design rule is simple: processing happens locally, with no upload, logging or storage of what you paste.