What input formats are supported?
The tool accepts standard .env format (KEY=VALUE, with optional quotes) and YAML key-value pairs. It auto-detects which format you pasted based on whether the input contains = signs or YAML-style colons.
⇄ Converters
Env Variable Converter
Convert .env files to Dockerfile, docker-compose, GitHub Actions, Vercel, Kubernetes ConfigMap, and more.
8 output formats Secret masking YAML input K8s support
How the Env Variable Converter Works
The ByteKiln Env Converter parses your .env or YAML input in-browser and reformats it into the target platform's syntax using pure JavaScript — no server, no uploads.
Auto-detection
The parser first checks for YAML indicators and tries js-yaml. If that fails or the input uses KEY=VALUE syntax, it falls back to the .env parser which handles quoted values and comment lines.
Secret detection
A regex pattern scans each key name for common secret indicators. Detected secrets are masked in most output formats, placed in the K8s Secret resource, and highlighted with a comment in the GitHub Actions format.
Output formats
Eight output formats cover the most common deployment platforms: .env, Dockerfile ENV, docker-compose environment block, GitHub Actions env/secrets, Vercel environment JSON, plain JSON, Kubernetes ConfigMap, and Kubernetes Secret.
FAQ
Short answers for the things developers usually ask before trusting a tool.
How does secret masking work?
Keys matching patterns like SECRET, KEY, PASSWORD, TOKEN, PRIVATE, API_KEY, AUTH, CREDENTIAL, CERT, SALT, or HMAC are detected as secrets. When masking is enabled, their values are partially obscured (first 2 + last 2 characters shown with asterisks).
What is the difference between K8s ConfigMap and K8s Secret?
A Kubernetes ConfigMap stores non-sensitive configuration. A Secret is intended for sensitive values and stores data base64-encoded. The converter puts detected secrets in the Secret output and non-secrets in the ConfigMap output.
Does my .env file get uploaded anywhere?
No. All conversion happens in your browser using JavaScript. Your environment variables never leave your machine.
Can I paste a .env file with comments?
Yes. Lines starting with # are treated as comments and ignored.
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formatters
YAML Formatter
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JSON Formatter
Format, validate, and minify JSON instantly with a browser-first editor.
converters
Mock API
Generate realistic fake JSON data from a JSON Schema, OpenAPI 3.x spec, or a sample JSON object shape.