Text Diff Checker
Free · No Sign-up · No AdsPaste two versions of text to instantly see what changed. Line-by-line diff with additions in green, removals in red.
Original (A)
Modified (B)
Shortcuts:⌘ShiftCCopy diffEscClear both
What is a Text Diff Checker?
A text diff tool compares two strings of text and identifies what was added, removed, or unchanged. It performs a line-by-line comparison using the LCS (Longest Common Subsequence) algorithm — the same algorithm that powers git diff and Unix diff.
Why use Deepchill's Text Diff Checker?
Deepchill's Text Diff runs entirely in your browser, preserving your privacy. It offers a clean, colorized line-level view with addition/removal counts, shareable URLs, and keyboard shortcuts. It is faster and less cluttered than diffchecker.com or text-compare.com.
Common Use Cases
- Code review: Compare two versions of a file to see what changed before a pull request.
- Document editing: Track changes between draft versions of essays, reports, or emails.
- Configuration comparison: Spot differences between environment config files or YAML/JSON settings.
- Log analysis: Compare application logs from two time periods to find what changed.
Example
Line-level diff visualization
Input
Hello World
This is line two
GoodbyeOutput
Hello World
+ This is line two — MODIFIED
- This is line two
GoodbyeFrequently Asked Questions
A text diff compares two versions of text and highlights which lines were added, removed, or unchanged. It is commonly used to review code changes, document edits, and log comparisons.