.env File Parser & Converter — to JSON, YAML, Docker

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ENV File Parser never leaves your browser

.ENV ⇅ upload

ENV File Parser Online

Updated 2026-08-02

Parse a .env file and convert it to JSON, YAML, docker-compose, Kubernetes or shell exports — and, more usefully, find out what it really contains. A .env is deceptively simple: a trailing comment truncates a value, a duplicate key silently overrides an earlier one, single quotes stop ${VAR} interpolating, and an unquoted value with a space behaves differently depending on who loads it. Every one of those is reported with the line it happened on.

Duplicates resolve the way dotenv resolves them — last definition wins — so the output shows what would actually load, not what the file looks like it says. Nothing is uploaded: a .env is usually the most sensitive file in a repo, so it is parsed entirely in your browser, and any value that looks like a real credential is flagged before you copy the result anywhere.

// how to use

1 Paste the contents of a .env file, or upload it — it is read in your browser, never sent anywhere.
2 Pick an output format from the tabs.
3 Read the issues list underneath. That is where the duplicate keys, stray comments and quoting mistakes show up.

// examples

A trailing comment silently changes the value

Input

DB_HOST=localhost   # primary

Output

DB_HOST = "localhost"
note — a trailing comment was stripped. Quote the value if the "#" is meant to be part of it.

Duplicate keys — the last one wins

Input

DB_PASSWORD=first
DB_PASSWORD=second

Output

DB_PASSWORD = "second"
warning — duplicate of the definition on line 1. dotenv keeps the LAST one, so the earlier value is dead.

Converted to docker-compose

Input

APP_ENV=production
APP_DEBUG=false

Output

environment:
  APP_ENV: production
  APP_DEBUG: "false"

// common uses

Turning a .env into a docker-compose or Kubernetes environment block Finding out why a variable is not the value you thought it was Generating a .env.example that actually matches the current .env Auditing an inherited .env for duplicate keys and quoting mistakes

// faq

Which output formats are available?

JSON, YAML, docker-compose (an environment: block), Kubernetes (an env: list of name/value pairs), shell exports, a normalised .env, and a .env.example with every value blanked out — that last one being the file people forget to update when they add a variable.

What does it actually check for?

Duplicate keys (and which one wins), trailing comments that silently truncate a value, unquoted values containing spaces, keys that are not valid environment-variable names, unterminated quotes, lines with no "=" at all, and single-quoted values where ${VAR} will not interpolate.

Which value wins when a key appears twice?

The last one. That matches dotenv and most loaders, so the output shows what would actually load rather than what the file appears to say — and the earlier definition is flagged as dead.

How are quotes handled?

Double quotes interpret escapes like \n and \t and can span multiple lines; single quotes are entirely literal, including any ${VAR} inside them; unquoted values are trimmed and cut at the first " #". Each of those is the real dotenv behaviour, and each one surprises somebody.

Is my .env uploaded?

No. A .env is usually the most sensitive file in a repository, so all parsing happens in your browser — including when you use the upload button, which reads the file locally. The tool also flags any value that looks like a real credential before you copy the output somewhere public.

// works with your data

JSON Formatter YAML Formatter JSON to YAML Hash Identifier Sort & Dedupe Lines

Use this via API

Get a free API key →

curl -X POST https://thesnaptools.com/api/v1/tools/env-parser \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"text":"DB_HOST=localhost # primary"}'