How to Diff Environment Files

Compare two .env files and find differences instantly. Free environment variable diff tool for developers. Identify missing, changed, and removed variables.

Open Environment Variable Diff Tool →

Step-by-Step Guide

1

Paste your first .env file

Copy the contents of your first environment file (e.g., .env.example or .env.production) and paste it into the left input area. Comments starting with # are ignored.

2

Paste your second .env file

Paste your second environment file (e.g., your local .env or another environment) into the right input area.

3

View the differences

The tool automatically highlights differences: variables only in the first file (removed), variables only in the second file (added), and variables present in both but with different values (changed).

4

Sync your environments

Use the diff results to update your environment files. Add missing variables, update changed values, and remove deprecated entries to keep your environments in sync.

Try It Now — Free

No signup, no download. Runs entirely in your browser.

Open Environment Variable Diff Tool

Frequently Asked Questions

What formats are supported?
The tool supports standard .env file format: KEY=value pairs, one per line. Lines starting with # are treated as comments and ignored. Empty lines are skipped.
Can I diff large environment files?
Yes. The tool handles files with hundreds of variables easily since all processing happens in your browser using efficient JavaScript algorithms.
Is my .env data secure?
Yes. The diff runs entirely in your browser. Your environment variables are never sent to any server. For extra security, never commit real secrets to .env files—use .env.example with placeholder values.
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