01 / DEV UTILITIES

Developer tools.

A collection of focused, private client-side utilities. No servers, no tracking, and zero telemetry — calculations happen directly inside your browser.

STATUS: ALL CLIENT-SIDE
PRIVACY: ZERO DATA RETAINED
OPEN & FREE TO USE

AI Prompt Token Counter & Cost Calculator

LIVE TOKEN ESTIMATION

Target AI Model

Input Prompt or Context

EST. TOKENS

$0.00000

EST. CALL COST

CHARACTERS

WORDS

JSON to TypeScript & Python Dataclass Generator

SCHEMA GENERATOR

Output Format

Root Type Name

Raw JSON Input

Generated Schema

Generated on client

Cron Schedule Expression Decoder

POSIX 5-FIELD STANDARD

Cron Expression (minute · hour · dom · month · dow)

Quick presets:

HUMAN-READABLE SCHEDULE

Every 15 minutes

Cryptographic API Key & Token Generator

WEB CRYPTO API (CSPRNG)

Token Format

Cryptographically Secure Token

Generated via crypto.getRandomValues()