# Developer Data Workflows

> Format, inspect, convert, and validate payloads in the browser when you need a fast dev workflow without opening heavier tooling.

## Tools in this collection

- [JSON Formatter & Validator](https://www.teafun.cyou/tools/json-formatter/) — Format, validate, and minify JSON instantly in your browser. Zero network requests — your data never leaves your device.
- [Structured Data Converter](https://www.teafun.cyou/tools/yaml-json-toml/) — Convert YAML, JSON, and TOML locally in your browser with multi-document YAML support and anchor resolution.
- [ENV / Shell / Docker Converter](https://www.teafun.cyou/tools/env-converter/) — Convert .env files to JSON, YAML, TOML, shell export, and Docker ENV instantly in your browser. Nothing is uploaded — all conversion is client-side.
- [JWT Decoder](https://www.teafun.cyou/tools/jwt-decoder/) — Decode JWT headers and payloads locally in your browser. Inspect claims, expiry, issuer, and timestamps without sending tokens anywhere.
- [HTTP Security Headers Checker](https://www.teafun.cyou/tools/http-headers-checker/) — Paste raw response headers or curl -I output to review common security headers locally, including CSP, HSTS, and COOP.
- [Log Formatter](https://www.teafun.cyou/tools/log-formatter/) — Paste JSON, nginx, Docker, syslog, or plain logs to normalize, filter by level, and inspect them locally in your browser.
- [Base64 Encoder / Decoder](https://www.teafun.cyou/tools/base64-tool/) — Encode and decode Base64 locally in your browser. Supports text conversion, URL-safe Base64, and file-to-Base64 export.
- [Cron Expression Builder](https://www.teafun.cyou/tools/cron-builder/) — Build cron expressions visually for Unix, Quartz, AWS EventBridge, and GitHub Actions. Preview upcoming run times instantly in your browser.

## FAQ

### When should I start with this collection?

Start here when your work begins with pasted data, config files, tokens, or headers and you want to inspect or convert them in sequence.

### How is this different from the broader developer category?

The developer category shows every dev tool. This collection narrows the path to the tools that usually belong in the same payload-debugging or data-conversion workflow.