vayntra/diffguru
Diff Guru - Privacy-first online diff tool. Compare text, code, JSON, PDFs, images, and files directly in your browser. No uploads. No server processing.
Diff Guru
Diff Guru is a privacy-first online diff tool for comparing text, code, and files directly in your browser.
Unlike many comparison tools that upload data to remote servers, Diff Guru processes everything locally inside your browser, ensuring that sensitive information such as source code, configuration files, or documents never leave your device.
🌐 Try Diff Guru Online
https://diffguru.com
Why Diff Guru?
Many online diff tools upload your files to servers for processing. This can be risky when working with confidential code or documents.
Diff Guru eliminates this risk by performing comparisons entirely client-side.
Key advantages
- No file uploads
- No server-side processing
- No storage of file contents
- No login or signup required
- Instant comparison results
Your data stays on your machine.
Features
Diff Guru provides a fast and secure way to compare text, code, and files.
Text & Code Comparison
Compare two blocks of text or source code with clear visual highlighting of additions, deletions, and modifications.
Unlimited Merge Operations
Merge detected differences without restrictions, allowing efficient reconciliation between file versions.
Jump to Next Change
Quickly navigate through detected differences and jump directly to the next change after merging.
Share Comparison Results
Generate shareable links so comparison results can be easily shared with teammates or collaborators.
Syntax Highlighting
Supports syntax highlighting for 20+ programming languages, making code differences easier to read.
JSON Comparison
Compare JSON objects and detect structural or value differences.
PDF Comparison
Identify differences between two PDF documents.
Image Comparison
Visually compare images to detect subtle changes.
Spreadsheet Comparison
Compare structured data from CSV and Excel files (XLS/XLSX).
Security & Privacy
Diff Guru is built around a privacy-first architecture.
All comparison logic runs locally in your browser using JavaScript. File contents are processed in memory and are never transmitted to any external server.
This makes Diff Guru suitable for comparing sensitive data such as:
- proprietary source code
- internal configuration files
- private documentation
- API responses
- confidential datasets
Your data remains under your control at all times.
Typical Use Cases
Diff Guru can be used for:
- reviewing source code changes
- comparing AI-generated outputs
- validating API responses
- comparing document revisions
- detecting configuration differences
- identifying visual changes between images
Who Is Diff Guru For?
Diff Guru is designed for anyone who needs a secure way to compare text or code.
Typical users include:
- software developers
- DevOps engineers
- QA engineers
- technical writers
- data analysts
- security-conscious teams
Anyone who wants to compare text, code, or files without uploading sensitive data can use Diff Guru.
Getting Started
Visit the tool:
Paste text, upload files, or drag and drop content to start comparing instantly.
No installation required.
Philosophy
Diff Guru is built around three core principles:
Privacy
Your files and code should never leave your machine.
Simplicity
Powerful tools should be easy to use without complex setup.
Speed
Comparisons should be instant and frictionless.
Feedback
Suggestions and feedback are welcome.
If you have ideas or feature requests, feel free to open an issue.
License
This repository documents the Diff Guru project and its philosophy.
The live tool is available at: