Text Diff Checker

Compare two texts and find differences. Line-by-line diff comparison tool.

Original Text

Modified Text

How to Use Text Diff Checker

Paste original text

Copy the original or older version of your text, code, or document and paste it into the left panel of the diff checker.

Paste modified text

Copy the updated or newer version and paste it into the right panel. Both panels accept any text format including code, prose, and structured data.

Compare and review

Click Compare to generate the diff. Additions appear in green, deletions in red, and modifications are highlighted at the word level for precise analysis.

Adjust view settings

Switch between side-by-side and inline views. Enable options like ignore whitespace or case-insensitive comparison to focus on meaningful changes only.

About Text Diff Checker

Text diff checker online — compare two pieces of text and highlight every difference with color coding. This free text comparison tool shows additions, deletions, and modifications line-by-line or word-by-word. Perfect for comparing code revisions, document drafts, configuration file changes, and API response differences. Supports side-by-side and inline diff views. All processing happens in your browser so your text remains private.

Key Features

Compare two texts side-by-side with color-coded difference highlighting
Line-by-line and word-by-word comparison modes for precise analysis
Inline and split-view diff display options for different workflows
Detect additions, deletions, and modifications with distinct color coding
Ignore whitespace and case differences with configurable options
One-click swap of left and right text panels for reverse comparison

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Frequently Asked Questions

How to compare two texts online for free?▾

Paste the original text on the left and the modified text on the right, then click Compare. Differences are highlighted instantly with green for additions and red for deletions. No signup required.

How to find differences between two code files?▾

Paste both versions of your code into the left and right panels. The diff checker highlights every changed line with precise word-level highlighting showing exactly what was modified.

How to compare text ignoring whitespace differences?▾

Enable the Ignore Whitespace option before comparing. The tool will skip differences in spaces, tabs, and line endings, showing only meaningful content changes.

How to compare two versions of a document?▾

Paste the older version on the left and the newer version on the right. The tool highlights all additions, deletions, and modifications with clear color coding for easy review.

How to use inline vs side-by-side diff view?▾

Side-by-side view shows both texts in parallel columns, ideal for wide screens. Inline view merges changes into a single column with additions and deletions marked, better for narrow screens.

How to compare configuration files for changes?▾

Paste your original and updated config files (JSON, YAML, XML, etc.) into the panels. The diff checker highlights every changed setting, helping you verify configuration updates.

How to compare API responses for debugging?▾

Paste expected and actual API responses into the panels. The tool highlights discrepancies in the response data, making it easy to identify API issues.