YAML to .env converter

How to use it

1. Enter yaml text, level separator and upper_case names.
2. The result appears straight away and updates as you edit.
3. Copy the result, or copy a link that keeps the same values to share it.

How it is calculated

YAML is read with the YAML 1.2 core schema, then each value's path is joined with the chosen separator, so database.host becomes DATABASE__HOST. Characters not allowed in names become _, values with spaces or symbols get single quotes, and values with line breaks get double quotes with \n.

Example

Inputs: Level separator = Double underscore __, UPPER_CASE names = yes. Result: .env: APP=toolsahla PORT=8080 DEBUG=false LANGUAGES__0=ar LANGUAGES__1=en DATABASE__HOST=localhost DATABASE__USER=admin WELCOME="Welcome to ToolSahla\nأهلا بك\n" ; Variables: 8.

# App settings
app: toolsahla
port: 8080
debug: false
languages:
  - ar
  - en
database:
  host: localhost
  user: admin
welcome: |
  Welcome to ToolSahla
  أهلا بك

APP=toolsahla
PORT=8080
DEBUG=false
LANGUAGES__0=ar
LANGUAGES__1=en
DATABASE__HOST=localhost
DATABASE__USER=admin
WELCOME="Welcome to ToolSahla\nأهلا بك\n"

Limits and caveats

• The tool supports a clear YAML subset: maps, lists, scalars, quoted strings, | and > block scalars and [ ] and { } flow collections. Anchors &, aliases *, tags ! and multiple documents are rejected with a clear message.
• Every value becomes text, and lists become numbered variables such as LIST__0.