| name | devtools |
| description | Developer utilities: Base64, JWT decode, hashing, UUID, passwords, timestamps, regex test, URL encode. Use instead of opening external websites for dev tools. |
| metadata | {"nessi":{"command":"dev","enabled":true}} |
Developer Tools
Quick developer utilities — no need to open external websites.
Commands
Encode / Decode
dev base64 encode "Hello World"
dev base64 decode "SGVsbG8gV29ybGQ="
dev url encode "hello world & foo=bar"
dev url decode "hello%20world%20%26%20foo%3Dbar"
JWT Decode
dev jwt "eyJhbGciOiJIUzI1NiIs..."
Decodes header + payload (no signature verification).
Hashing
dev hash "some text"
dev hash "some text" --algo md5
Algorithms: sha256 (default), sha1, sha512, md5.
Generate
dev uuid
dev password
dev password --length 32 --no-symbols
Timestamp
dev timestamp
dev timestamp 1713456789
dev timestamp "2024-04-18T15:33:09Z"
Converts between Unix timestamp and ISO date. Without arguments, shows current time.
Regex
dev regex "^[a-z]+@[a-z]+\.[a-z]{2,}$" "user@example.com"
Tests a pattern against input text, shows matches and capture groups.
Notes
- All operations run locally in the browser
- Hashing uses Web Crypto API (SHA) or fallback for MD5
- JWT decode is read-only — no signature verification
