Diff Checker

Compare two texts side-by-side with line-by-line and word-level diff highlighting. Real-time statistics: lines added (green), removed (red), unchanged. Ignore whitespace and case options.

Word Diff Statistics Real-time

Compare Texts (Updated Live)

Text 1 (Original)

Text 2 (Modified)

Ignore Whitespace

Ignore Case

Diff Result

Paste texts above to see differences

How It Works

Line Diff: Shows entire lines added or removed

Word Diff: Highlights word-level changes within lines for more precise comparison

Green = added text
Red = removed text
Gray = unchanged text
Updates run as you type

Diff Checker: How It Works

The AfroTools Diff Checker lets you compare two blocks of text or code side by side and instantly see every difference. Paste your original text on the left and the modified version on the right, and the tool highlights additions, deletions, and changes with clear colour coding — green for added lines, red for removed lines, and yellow for modified content. Word-level diffing pinpoints the exact characters that changed within each line, making it easy to spot subtle edits. The tool provides statistics showing the number of added, removed, and unchanged lines at a glance. Toggle options let you ignore whitespace differences or perform case-insensitive comparisons when those differences are not relevant to your review. This diff tool is invaluable for developers reviewing code changes, writers comparing document drafts, translators checking text revisions, and anyone who needs to quickly identify what changed between two versions. All comparison happens in your browser in real time — no data leaves your device.

Frequently Asked Questions

What types of content can I compare?

You can compare any plain text — source code in any programming language, configuration files, JSON, XML, CSV data, prose documents, or any other text content.

What does "ignore whitespace" do?

When enabled, the tool ignores differences in spaces, tabs, and trailing whitespace. This is useful when comparing code that may have different indentation styles but is otherwise identical.

Is there a size limit for the text I can compare?

Since the comparison runs in your browser, there is no server-imposed limit. However, very large texts (over 50,000 lines) may slow down rendering. For typical documents and code files, performance is instant.

What do the colours in the diff output mean?

Green highlights indicate added lines or words, red highlights show removed content, and yellow marks lines that were modified. Word-level highlighting within lines shows exactly which characters changed.

Is my text sent to any server?

No. The comparison is performed client-side in your browser using JavaScript. Use a browser and device you control, and avoid pasting secrets, credentials, private customer records, or confidential contracts into shared examples.

Diff Checker verification and limitations

Official/source check

Do not paste private keys, passwords, customer records, or unreleased source code into a browser you do not control. Use the comparison as a review aid, then confirm important code, contract, or policy changes in the source system.

Export or save path

Use the page output, copy, print, download, or saved draft controls where available, and keep a separate record before acting on a money, travel, career, telecom, or document decision.

Related next steps

JSON formatter · Regex tester · Markdown editor

Review check

Use diff output as a review aid, not approval

Compare original and modified text locally, switch line or word diff, then copy the result or a local review note.

Local comparison

The two panes are compared in your browser.

What to check

Methodology: split the two inputs into comparable units, mark additions and removals, then summarize changed, added, removed, and unchanged lines.
Review whitespace-only changes, case settings, copied snippets, generated code, legal wording, and sensitive text before sharing.
Use the copied diff as a checklist for reviewers, not as automatic acceptance.

Limitations

Disclaimer: local comparison helper only, not a code approval, legal redline, security review, or translation certification.
Semantic meaning, hidden formatting, binary files, and generated artifacts may need separate review.
Do not paste secrets, credentials, private customer records, or confidential contracts into shared examples.

Review diff output

Source/reference note: verify final changes in your version-control diff, document editor, test suite, or approval workflow before publishing.