---
title: Diff Checker: Free Online Tool | Relic
description: Free diff checker. Paste two versions of text and see what was added, removed or changed, highlighted line by line. All in your browser, nothing uploaded.
canonical: https://relic.space/tools/diff-checker
source: https://relic.space/llms.txt
---
# Diff Checker

Paste two versions of text and see exactly what changed, line by line. Added lines in green, removed in red. Private and instant.

Runs entirely in your browser. Nothing you type is uploaded.

Original

Changed

Differences+0\-0

Paste text in both boxes to see the differences.

## See what changed at a glance

Paste an old version on the left and a new one on the right, and this **diff checker** lines them up and highlights the changes. Added lines show up tinted green, removed lines tinted red, and untouched lines stay neutral, so you can scan a config file, a contract, or a draft and spot every edit. It runs entirely in your browser, so the text you compare is never uploaded anywhere.

## Compare against versions you saved

A diff is only as good as the older copy you kept. **Relic** quietly keeps an end-to-end encrypted history of everything you copy, searchable on every device, so the earlier version you need to compare against is still there when you go looking. The diff is free. Having the old copy at all is what Relic gives you.

You just copied that. What if you never lost it?

**Relic** remembers everything you copy, forever, searchable on every device, and  end-to-end encrypted so only you can read it.

 250 MB free

[Download forWindows](https://relic.space/download/windows)[Download formacOS](https://relic.space/download/macos)[Download forLinux](https://relic.space/download/linux)[Download forAndroid](https://play.google.com/store/apps/details?id=relic.space.app&referrer=utm%5Fsource%3Drelic.space%26utm%5Fmedium%3Dwebsite%26utm%5Fcampaign%3Dcontent)[Download foriPhone](https://apps.apple.com/us/app/relic-clipboard-vault/id6800556025)

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