Does Text Diff upload my data?

Runs locally in your browser. Text is not uploaded.

How do I use Text Diff?

1. Paste original text in the left panel. 2. Paste modified text in the right panel. 3. Choose diff mode: line (default), word, or character. 4. Choose view mode: side-by-side or unified. 5. Toggle ignore rules to filter out insignificant changes. 6. Copy or download the diff as a patch file.

What are common mistakes with Text Diff?

Forgetting to swap sides when comparing in the wrong order. Large texts (>100KB) may impact performance. Ignore rules apply to both sides equally.

Back

Text Diff Tool

Compare two texts locally with line/word/char/semantic diff modes, side-by-side or unified view, ignore rules, and patch export.

Left / Original

0 / 200,000 chars

Right / Revised

0 / 200,000 chars

Diff Mode

View

Context Lines

Ignore extra whitespaceIgnore caseIgnore line endingsIgnore empty lines

Added: 0Removed: 0Unchanged: 0No differences

Paste text on both sides to start diffing.

Everything runs locally in your browser. No uploads.

Text Diff: Guide

Intent: Compare two texts with line, word, or character-level diff. Better than Diffchecker free tier with local-only processing.
What it does: Compares two texts and shows differences with highlighted changes. Supports multiple diff granularities and ignore rules.
Key features: Line/word/char diff modes, Side-by-side and unified views, Ignore rules (whitespace, case, line endings), Export unified diff patches, Swap/compare/copy actions
Privacy: Runs locally in your browser. Text is not uploaded.
Best for: Comparing code or document revisions
Reviewing edits before accepting changes
Finding differences in config files or logs
Creating patches for version control
Why this tool: Multiple diff modes for different use cases
Ignore rules reduce noise in comparisons
Local-only processing keeps sensitive data private
Simple export to unified diff format