FileConverterPro

.env Validator

Validate .env files online for free. Detect syntax errors, duplicate keys, empty values, and missing quotes. Compare against .env.example.

Runs entirely in your browser — files never uploaded

9Variables
1Errors
3Warnings
L5Key "DB_PASSWORD" has an empty value
L9Mismatched quotes for "API_SECRET"
L13Duplicate key "DB_HOST" (first seen on line 2)
L14Key "INVALID KEY" contains unusual characters
DB_HOSTlocalhost
DB_PORT5432
DB_NAMEmyapp
DB_PASSWORDempty
API_KEYsk-1234567890abcdef
API_SECRET"my secret with spaces
REDIS_URLredis://localhost:6379
DB_HOST127.0.0.1
INVALID KEYvalue

How to use .env Validator

  1. 1. Paste or upload. Paste your .env file contents or upload the file.
  2. 2. Review issues. See errors (missing quotes, bad syntax) and warnings (duplicates, empty values).
  3. 3. Fix. Update your .env file based on the issues found.

FAQ

What does it check for?

Missing = signs, empty keys, duplicate keys, mismatched quotes, unquoted values with spaces, and empty values.

Is my .env file uploaded?

No. All validation happens in your browser. Your secrets never leave your device.

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