BYTETOOLS

JSON to .env Converter

Convert JSON to a .env file online. Flattens nested keys with underscores, upper-cases names and quotes tricky values — nothing leaves your device.

Drop a .json file here or click to browse

What is the JSON to .env Converter?

The ByteTools JSON to . env Converter flattens a JSON configuration object into KEY=value lines.

  • Nested objects flattened into UPPER_SNAKE_CASE names
  • Arrays serialised as JSON, or expanded by index on request
  • Values with spaces, #, = or newlines quoted and escaped
  • Optional key prefix, custom separator, export prefix and sorting
  • Colliding key names renamed instead of overwritten, and counted
  • Runs entirely in your browser — nothing is uploaded

How to use the JSON to .env Converter

  1. 1

    Paste your JSON configuration, or drop a .json file onto the drop zone.

  2. 2

    Optionally set a key prefix such as APP and change the nesting separator.

  3. 3

    Tick 'Expand arrays by index', 'Prefix each line with export', 'Sort keys A–Z' or 'Skip null values' as needed.

  4. 4

    Click Convert to .env, then Copy the result or Download it as a .env file.

About the JSON to .env Converter

The ByteTools JSON to .env Converter flattens a JSON configuration object into KEY=value lines. Nested paths are joined with an underscore, names are upper-cased and stripped down to letters, digits and underscores, and values containing spaces, hashes, equals signs or newlines are wrapped in double quotes with the newlines and quotes escaped.

You control the details: add a prefix so every variable starts with APP_, change the nesting separator, expand arrays by index instead of serialising them as JSON, prefix each line with export for a shell script, sort the keys, or drop nulls entirely. Colliding names are renamed rather than silently overwriting each other.

The conversion runs 100% locally in your browser. Your JSON is never uploaded, logged or stored — which matters here, because configuration objects are exactly the kind of thing that carries credentials.

Frequently asked questions

How do I turn a JSON config file into a .env file?

Paste the JSON and click Convert to .env. Nested keys are joined with underscores and upper-cased, so {"database":{"host":"localhost"}} becomes DATABASE_HOST=localhost, ready to copy or download.

How are nested objects flattened?

Each level of the path is joined by the nesting separator, which defaults to an underscore. A value at app.database.host becomes APP_DATABASE_HOST, and you can change the separator if your loader expects something else.

What happens to arrays?

By default an array is stored as a JSON string in one variable, which keeps it intact. Tick 'Expand arrays by index' and each element gets its own numbered variable instead, such as TAGS_0 and TAGS_1.

When are values quoted?

Whenever leaving them bare would break parsing — spaces, #, =, quotes, backslashes, dollar signs or newlines all trigger double quoting, with newlines written as \n and quotes as \" inside.

Is it safe to paste config with secrets?

The conversion runs entirely in your browser and nothing is uploaded or logged, so the data never leaves your device. As always with credentials, be mindful of your own clipboard and any browser extensions you have installed.

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