Text Difference Checker Online

Text Difference Checker Online for Text, Documents, Code, and Data Files

Use this text difference checker to compare two versions of text, notes, paragraphs, TXT files, website copy, emails, scripts, plain text data, and content drafts. It is useful when you want to find exactly what changed between an old text and a new text.

This browser-based file difference checker is designed for quick comparison of original and changed content. You can paste content manually or upload supported files, then review the side-by-side difference result and the only-differences result.

Supported Difference Checker File Types

The tool supports text files, TXT files, JavaScript files, HTML files, CSS files, JSON files, XML files, CSV files, PDF files, DOCX files, XLS files, and XLSX files. Text-based files are compared line by line. PDF and DOCX files are converted into readable text before comparison. Excel files are converted into sheet, row, and cell text for comparison.

How to Use the Online Difference Checker

1. Paste the original content into the left box or upload the original file.
2. Paste the changed content into the right box or upload the changed file.
3. Select comparison options such as ignore spaces, ignore blank lines, or ignore uppercase and lowercase differences.
4. Click Compare Differences.
5. Review added, removed, and changed differences in the side-by-side result.
6. Use the only-differences view, copy the differences, or download a text or HTML report.

Privacy Friendly Browser-Based Difference Comparison

This static version reads selected files inside your browser. The comparison runs on your device, which is useful for private text comparison, private code comparison, private document comparison, and private spreadsheet comparison. A server is not required for this version.

Difference Checker Features

• Side-by-side original and changed comparison result.
• Added lines highlighted in green.
• Removed lines highlighted in red.
• Changed lines highlighted in yellow.
• Only-differences result section.
• Ignore spaces, ignore blank lines, ignore case, and trim line options.
• Summary cards for added, removed, changed, same, and total lines.
• Downloadable text difference report and HTML difference report.

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Frequently Asked Questions

Can I compare PDF files online?

Yes. You can compare readable text-based PDF files. Scanned or image-only PDFs may not extract text correctly without OCR.

Can I compare Word DOCX files online?

Yes. The DOCX difference checker extracts document text and compares the readable content. It does not compare exact Word formatting, images, comments, or advanced layout details.

Can I compare Excel files online?

Yes. XLS and XLSX files can be compared by sheet, row, and cell values. Charts, images, macros, and advanced formatting are not compared in this browser-based version.

What is the difference between a text comparison and a file comparison?

Text comparison compares pasted content directly. File comparison first reads the selected file, extracts readable text or cell values, and then compares the extracted content.