Config File Diff — Compare Configuration Versions
Quick Answer: Paste two versions of any configuration file to see what changed. Works with any text format: .env files, nginx configs, Dockerfiles, systemd units, or application configs. Line-level diff shows exactly which settings were added, removed, or modified.
FAQ
How do I compare .env files?
Paste both .env file contents. The diff shows which variables were added, removed, or had their values changed. Be cautious about pasting secrets -- this tool runs entirely in your browser.
Can I compare Dockerfiles?
Yes. Paste both Dockerfiles to see which instructions changed. Useful for reviewing Dockerfile updates that affect build caching or layer ordering.