Developer & Data Tools·Zero-Upload Browser Execution

UUID & CSPRNG Password Generator

Generate cryptographic UUID v4 batches and high-entropy passwords using Web Crypto API `crypto.getRandomValues`.

UUID Count (1-50)Ctrl/Cmd + Enter to run

Password Length (20 chars)

Output

Press Execute (or Ctrl/Cmd + Enter) to view output.

More in Developer & Data Tools

JSON Formatter, Validator & Diff

Prettify or minify JSON with strict syntax diagnostics, key counts, and normalized structural comparison against a second payload.

JSON to TypeScript & YAML

Infer strict TypeScript interfaces or clean YAML configuration directly from any JSON object or API payload.

JWT Inspector & Claims Decoder

Decode JWT header and payload JSON locally in browser memory, inspect claims, and verify token expiration timestamps.

Base64 & URL Converter

Unicode-safe UTF-8 Base64 encoding/decoding and RFC-3986 URL percent-encoding/decoding with instant validation.

Regex Playground & Inspector

Test regular expressions with custom flags (g, i, m, s), inspect capture groups, and verify exact match indices.

Cron Expression Visualizer

Parse 5-field cron schedules into human-readable breakdowns and compute the next upcoming UTC trigger timestamps.

SHA-256 / SHA-512 & HMAC Signer

Compute cryptographic SHA-256/SHA-512 digests and HMAC-SHA256 webhook signatures locally via SubtleCrypto.

CSV ↔ JSON & Markdown Table

Parse quoted CSV rows into structured JSON arrays, convert JSON back to CSV, or generate aligned Markdown tables.