Online File Compare Tool – Diff Checker

Compare two files or text blocks side-by-side. Instantly highlight additions, deletions, and unchanged lines — all inside your browser.

Drag & drop file here, or

No file selected

Drag & drop file here, or

No file selected

0
Lines Added
0
Lines Removed
0
Lines Changed
0
Lines Same
Files are identical. No differences were found.
Added Removed Modified Same
Version A (Original)
Version B (Modified)
Unified Diff — Version A vs Version B
Diff 0 of 0

How to Use the File Compare Tool?

  1. Choose Text mode to paste code/text directly, or File Upload to upload files from your device.
  2. Enter or upload the Original content on the left and the Modified content on the right.
  3. Click Compare to instantly generate a color-coded diff result.
  4. Switch between Split and Unified view to analyze differences your way.
  5. Use Prev / Next buttons to navigate through individual diff blocks.
  6. Copy or download the diff output for documentation or review.

Why Use Our File Compare Tool?

Instantly spot differences between two code files, configuration files, documents, or any plain-text content. Perfect for code reviews, release management, and debugging.

Side-by-Side & Unified Views

Switch between split-pane and unified diff views for the most convenient reading experience.

Private & Secure

All comparison happens inside your browser. Your files and code are never uploaded or stored.

File Upload Support

Upload any plain-text file including .js, .css, .html, .json, .txt, .xml, .yaml, and more.

Diff Statistics

See at a glance how many lines were added, removed, changed, or remained the same.

More developer tools: JS Beautifier · CSS Beautifier · HTML Beautifier

Common Use Cases

  • Comparing two versions of a configuration or environment file
  • Reviewing code changes before a pull request or merge
  • Detecting differences between copied or edited documents
  • Auditing JSON, XML, or YAML data files for unintended changes
  • Verifying patch files and release notes

Frequently Asked Questions

Yes. The VINAR TECH File Compare tool is completely free to use with no signup, login, or installation required.

No. All comparison is performed entirely inside your browser using JavaScript. Your files and text are never sent to any server, ensuring complete privacy.

Any plain-text file is supported — including .js, .ts, .css, .html, .json, .xml, .yaml, .txt, .md, .py, .java, .sql, and more. Binary files are not supported.

Split view shows the original and modified files side-by-side, making it easy to compare specific lines. Unified view shows a single combined output with additions marked in green and deletions in red, similar to a standard git diff output.