Text Diff & Compare

Paste two versions or upload files to compare text, code, and config changes locally.

Original

Upload original

Modified

Upload modified

ToolSuite Text Diff is a free online tool that compares text, code, or files side-by-side using the Myers diff algorithm. It provides line-level, character-level, and word-level change highlighting with syntax highlighting for 10+ programming languages. Share diffs via URL, export as unified patch files, and compare files with 50,000+ lines. Fully client-side — your code stays private.

How to Compare Text Online

+Enter Text

Paste or upload original and modified text/code in the side-by-side editors.

+Compare

See additions, deletions, and modifications highlighted at line, character, or word level.

+Navigate and Export

Jump between changes, export as unified diff patch, or share via URL.

Text Diff Features

What you get

How it helps

Dual View Modes

Switch between side-by-side and inline (unified) diff views.

Multi-Level Diffing

Line-level, character-level, and word-level change highlighting.

Syntax Highlighting

Support for JavaScript, TypeScript, Python, HTML, CSS, JSON, XML, YAML, SQL, Markdown.

Smart Comparison

Options to ignore whitespace, case, trailing whitespace, and blank lines.

Export & Share

Generate unified diff patches and share comparisons via URL hash.

Large File Support

Efficiently compare files with 50,000+ lines using the Myers algorithm.

Who Uses a Text Diff Tool?

code_review.diff|42+++--

Software developers comparing code versions before committing or during code review

document_revisions.md|17++++-

Technical writers tracking document revisions and editorial changes

staging_vs_prod.yml|8+++--

DevOps engineers diffing configuration files between staging and production

essay_draft_v2.txt|23++++-

Students comparing essay drafts to track improvements

api_response.json|11+++--

QA engineers comparing API responses between test environments

Why Choose ToolSuite Text Diff?

Feature	ToolSuite	Diffchecker	Text Compare!	Meld
Privacy (no upload)	Yes	No	No	Desktop only
No installation	Yes	Yes	Yes	No
Character-level diff	Yes	Yes	No	Yes
Syntax highlighting	10+ languages	Paid	No	Yes
Share via URL	Yes	Paid	No	No
Export patch file	Yes	Paid	No	Yes

Text Comparison Tips & Best Practices

Use "ignore whitespace" when comparing reformatted code to focus on actual content changes.

Use word-level diff for prose and documentation to see exact word additions and removals.

Character-level diff is best for finding subtle code changes in variable names and values.

Export as unified diff patch format for sharing in code review workflows and pull requests.

Use keyboard shortcuts (Alt+Up/Down) to quickly jump between changes in large files.

Share diff URLs for remote code review sessions without requiring tool installation.