Text diff

About Text diff

Text Diff compares two blocks of plain text line by line and shows exactly what was added, removed, or unchanged. Works with any text — code, prose, configs, logs, lists, or markdown — no JSON structure required.

When to use Text diff

• Review changes to a configuration file or settings document
• Compare two versions of a paragraph or article draft during editing
• Find differences between two log file excerpts during debugging
• Check if two code snippets are identical or spot subtle line-level differences
• Verify a data transformation preserved all expected plain-text lines

How it works

Paste two text blocks separated by a line containing "---". The tool splits both inputs into individual lines and runs a line-by-line comparison. Lines present only in the left block are prefixed with "-"; lines present only in the right block are prefixed with "+"; lines shared by both appear without a prefix.

Example

Text Diff output

Input:

first line
shared line
old ending
---
first line
shared line
new ending

Output:

  first line
  shared line
- old ending
+ new ending

Privacy & Security Guarantee

Text diff processes all data locally inside your web browser. No input text, files, credentials, or outputs are ever transmitted to remote servers, logged to analytics databases, or retained across sessions.