Minecraft Config Diff Checker

Compare two Paper, Purpur, or properties configs and see exactly which keys changed, were added, or removed.

Compare configs

Paste two config files or upload them to see what changed. Works with properties files (key=value) and simple YAML (key: value). Very nested YAML may need a quick manual check.

Comparison

Minecraft Config Diff Checker guide

Compare two Minecraft config files side by side — Paper, Purpur, or properties — and see exactly which keys were added, removed, or changed before you deploy to a live server.

Catch risky config changes early

Updating Paper or Purpur often regenerates large YAML files. Copying settings from a test world to production is another common source of silent mistakes. A quick diff shows what actually changed so you do not ship a surprise simulation-distance cut or a disabled spawn flag.

Paste the old file and the new file, choose properties or YAML-style parsing, and review a unified or side-by-side report. Filter to differences only when you want a short checklist for your change window.

Built for server owners, not just developers

Results highlight added keys, removed keys, and value changes in plain language. Download or copy the report for tickets, Discord staff channels, or your own notes after a version upgrade.

Use it before every major Paper bump, when cloning configs between lobby and survival, or after a host migration when two folders both claim to be “the current config.”

Tips for a clean comparison

Compare files from the same software family when you can (for example two paper-global.yml exports). Strip secrets like database passwords from pastes you share with others. For deeply nested YAML, treat the tool as a first pass and skim indentation-heavy blocks manually if something looks off.

After you accept a new config, restart on a test world first, watch TPS, then promote the same file to production.

Common questions

Does this support full nested YAML?
It works best with properties files and relatively flat YAML. Deeply nested documents may still need a quick manual review for indentation-heavy sections.
Can I upload files instead of pasting?
Yes. You can paste text or load files into each side, then run the comparison and export a report.
When should I diff configs?
Before updating Paper or Purpur, before copying settings between servers, and after a restore when you are not sure which folder is newest.