Developer Tools
JSON Formatter & Validator
Format, validate and pretty-print JSON in your browser — no data leaves your machine.
JWT Decoder
Decode a JSON Web Token’s header and payload in your browser — no data leaves your machine.
UUID Generator
Generate random v4 UUIDs in your browser — no data leaves your machine.
Regex Tester
Test regular expressions against text in your browser — no data leaves your machine.
Base64 / Hex / URL Converter
Encode and decode Base64, hex and URL-encoded text in your browser — no data leaves your machine.
.gitignore Generator
Combine .gitignore templates for your stack in your browser — no data leaves your machine.
Cron Expression Parser
Turn a cron expression into a plain-English schedule — no data leaves your machine.
Markdown Previewer
Preview GitHub-flavored Markdown live in your browser — no data leaves your machine.
JSON Mock Data Generator
Define a schema and generate realistic fake JSON data in your browser — perfect for mocking API responses before the backend exists.
Env to Vault JSON Converter
Convert a .env file to a flat JSON object for HashiCorp Vault — and back — entirely in your browser.
HTML Previewer
Preview raw HTML live in a sandboxed iframe — great for checking an HTML email template before sending.
Dockerfile Generator
Generate a production-ready, multi-stage Dockerfile and .dockerignore for Node.js, Next.js, Python, Go, Java, or a static site — in your browser.