Is my code or text uploaded to any server?

No. The entire comparison algorithm runs 100% locally in your web browser using JavaScript. No code, tokens, or text are ever transmitted to any remote server.

Can I export the diff as a Git patch file?

Yes. Click the 'Download .patch' button to generate a standard Unified Diff file compatible with git apply.

What is the difference between Side-by-Side and Unified view?

Side-by-Side view shows the original and modified texts in two synchronized split columns. Unified view interleaves additions and deletions into a single linear view similar to git diff output.

Is my code or text uploaded to any server?

No. The entire comparison algorithm runs 100% locally in your web browser using JavaScript. No code, tokens, or text are ever transmitted to any remote server.

Can I export the diff as a Git patch file?

Yes. Click the 'Download .patch' button to generate a standard Unified Diff file compatible with git apply.

What is the difference between Side-by-Side and Unified view?

Side-by-Side view shows the original and modified texts in two synchronized split columns. Unified view interleaves additions and deletions into a single linear view similar to git diff output.

Text Diff & Code Compare Tool Online - Side-by-Side Diff Checker

Why Use Client-Side Diff Comparison?

Uploading private proprietary code or sensitive config files to remote web servers introduces major compliance risks. Our tool executes all diff calculations in your local browser sandbox using a high-performance Longest Common Subsequence (LCS) diffing algorithm.

How does the diff algorithm work?

The tool splits both inputs into line arrays and computes line-level additions, deletions, and equalities using the Longest Common Subsequence (LCS) matrix. When lines differ, it performs sub-line matching to clearly highlight exact character and word changes.

Can I apply the downloaded patch with Git?

Yes! The downloaded .patch file uses standard unified diff format (with --- original and +++ modified headers). You can apply it directly to your repository using git apply filename.patch.

Does this tool support JSON and YAML comparison?

Yes, any text-based format including JSON, YAML, Markdown, Python, TypeScript, and SQL can be compared accurately.

Frequently Asked Questions

Is Text Diff & Code Compare Tool free to use?

Yes, Text Diff & Code Compare Tool is completely free with no signup or registration required. All processing happens directly in your browser.

Is my data safe?

Absolutely. Your data never leaves your device. Everything runs locally in your browser — no uploads, no servers, no tracking.

Do I need to install anything?

No installation needed. Text Diff & Code Compare Tool works entirely in your web browser on both desktop and mobile devices.

How do I use

Simply enter or paste your input in the tool above, and the result will be generated instantly. No configuration required.