DevCoreTools

.env Formatter / Validator

Paste a .env file to clean formatting, validate variable syntax, detect duplicates, and review common configuration warnings.

Paste .env content or load a sample to begin.

.env input

Paste KEY=value lines. The parser keeps values as text and never expands variables, resolves paths, or executes shell syntax.

Processed locally in your browser Limit 2 MB. Your input is processed in your browser and is not uploaded or sent to a server. Avoid pasting production secrets, access tokens, private keys, passwords, or sensitive customer data unless you understand the risk.

Formatted .env

Formatted output appears after validation.

.env validation

Syntax, duplicates, quoting, and secret cautions

Validate .env content to see variable counts, duplicate keys, comments, blank lines, and grouped findings.

.env Guide

Format environment files without executing them

Use this page for local .env syntax cleanup and review before copying settings into an app, Docker Compose file, or CI variable list.

Validation rules

The validator accepts blank lines, full-line comments, optional export prefixes, and KEY=value assignments with letters, numbers, and underscores in keys.

Duplicate keys

Duplicate variable names are flagged because many loaders keep the last value, while teammates may read the first one during review.

Quoting and comments

Quoted values can contain spaces and hashes. Unquoted inline comments are detected when a hash follows whitespace.

Secrets caution

Names such as API_KEY, SECRET, TOKEN, PASSWORD, PRIVATE_KEY, CONNECTION_STRING, and DATABASE_URL trigger warnings so real credentials get extra review.

.env vs YAML or JSON

.env files are line-oriented key-value text, not nested configuration. Use YAML or JSON tools when the config needs objects, arrays, or structured schemas.

Formatting behavior

Formatting can normalize equals spacing, preserve comments and blank lines, or sort keys alphabetically. It never expands variables or evaluates shell expressions.

.env Formatter FAQ

Does this read my local environment variables?

No. The page only processes text you paste into the editor or load from a sample.

Does it expand values like $HOME or command substitutions?

No. Variables, paths, and shell expressions stay as plain text and are never resolved or executed.

Are comments preserved?

Yes by default. Turn off comment and blank-line preservation when you want only variable assignments in the formatted output.

Can I sort keys?

Yes. Sorting is off by default so comments and file order stay intact unless you choose alphabetical output.

Can I download the formatted file?

Yes. Use the download action to save the formatted output as .env.

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