How do I compare two text files online for free?

Paste your two texts into the input boxes on Compares-Text, then click Compare. The tool instantly highlights additions in green, deletions in red, and modifications in blue.

Can I compare PDF files online?

Yes. Upload two PDF files using the PDF / DOCX / PPTX tab and click Compare Documents. Compares-Text extracts the text from both PDFs and shows a detailed diff.

Is Compares-Text free to use?

Yes, Compares-Text is completely free. No registration, no software installation, and no file size limits for text comparison.

1st Version

2nd Version

Ctrl+Enter

− Removedin 1st, missing in 2nd

+ Addedmissing in 1st, in 2nd

~ Modifiedchanged words only

= Unchanged

0 added

0 removed

0 unchanged

0 / 0 jump to diff

1st Version — removed/changed

2nd Version — added/changed

Analysis

Tone · Semantics · Spelling

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1st Image

PNG, JPG, GIF, WebP — drag & drop or click

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2nd Image

PNG, JPG, GIF, WebP — drag & drop or click

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1st Document

PDF · DOCX · PPTX · XML · JSON

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2nd Document

PDF · DOCX · PPTX · XML · JSON

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1st Excel File

.xlsx · .xls · .csv

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2nd Excel File

.xlsx · .xls · .csv

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1st Folder (Archive)

ZIP, TAR, TAR.GZ or 7Z

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2nd Folder (Archive)

ZIP, TAR, TAR.GZ or 7Z

Language

Ignore Comments Ignore Whitespace

1st Version

2nd Version

Schema 1 (SQL DDL)

Schema 2 (SQL DDL)

API URL 1

API URL 2

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1st Log File

.log · .txt · .out — application / nginx / server logs

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2nd Log File

.log · .txt · .out — compare errors, warnings, patterns

Website URL 1

Website URL 2

Compare Word (DOCX) Documents Online Free

Compare two Word documents online instantly. Track added, removed and changed text across DOCX files for free.

✓ 100% Free ✓ No Installation ✓ 8 File Formats ✓ Privacy First ✓ AI-Powered Analysis

Everything You Need to Compare Files Online

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Text & Code Compare

Line-by-line diff with word-level highlighting. Perfect for source code, configs, and documents.

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PDF Comparison

Upload two PDF files and instantly see every text change, addition, and deletion side by side.

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Word DOCX Compare

Track revisions between Word documents. Ideal for legal contracts, reports, and proposals.

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Excel Spreadsheet Diff

Detect changed cells, rows, formulas, and values across two Excel files in seconds.

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Image Comparison

Pixel-level visual diff for PNG, JPG, and WebP. Great for UI testing and design review.

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ZIP & Folder Compare

Compare entire directory trees or ZIP archives to find added, removed, and changed files.

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JSON & Config Files

Validate API responses and configuration changes with structured JSON comparison.

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AI-Powered Analysis

Get tone, semantic, and spelling change analysis powered by AI — beyond simple line diffs.

NEW

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Code Compare

Diff source code in 12+ languages with syntax awareness, ignore-comments and ignore-whitespace options.

NEW

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Database Schema Compare

Compare MySQL, PostgreSQL, SQL Server & Oracle schemas — see added/removed tables, column, index & FK changes.

NEW

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API Response Compare

Compare REST/GraphQL API responses — body diff, header diff, status code & performance differences.

NEW

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Log File Compare

Compare application, server & nginx logs. Detects new errors, new warnings and resolved issues automatically.

NEW

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Website Compare

Compare two live URLs for HTML, CSS, SEO & metadata differences — perfect for migrations and audits.

How to Compare Documents in 3 Steps

Choose Your File Type

Select Text, Image, PDF/DOCX/PPTX, Excel, or ZIP from the tool tabs above.

Upload or Paste Content

Paste text directly, or drag & drop your files into the upload zones.

Review the Differences

Instantly see a colour-coded side-by-side diff with added, removed, and changed lines.

Navigate with Arrows

Use the ↑ ↓ buttons to jump between each difference without scrolling manually.

Frequently Asked Questions

Paste your original text in the left box and the modified text in the right box, then click Compare Text. Additions are highlighted green, deletions red, and word-level changes blue. No account needed.

Yes. Click the PDF / DOCX / PPTX tab, upload your two PDF files, and click Compare Documents. Compares-Text works entirely in your browser — nothing to install.

Text comparison runs entirely client-side in your browser — your text never leaves your device. For file uploads (PDF, Excel, images), files are processed on the server and immediately discarded after comparison.

Compares-Text supports plain text, PDF, Word DOCX, PowerPoint PPTX, Excel XLSX/XLS, images (PNG, JPG, GIF, WebP, BMP), JSON, XML, ZIP archives, and folder trees.

Beyond line-by-line diffing, Compares-Text offers word-level highlighting within changed lines, an AI analysis panel for tone and semantic shifts, and support for 8 different file formats — all in one free tool.

Yes. The LCS-based diff algorithm is optimised for performance. Text comparison handles thousands of lines quickly. For very large PDFs or Excel files, processing may take a few extra seconds.