Diff Viewer
Compare and visualize differences between two text documents
Original Text
Modified Text
What is a Diff Viewer?
A Diff Viewer is a tool that compares two text sources and highlights the differences between them. It is an essential utility for software engineers, helping to track changes in source code, configuration files, or documentation.
Our Diff Viewer provides a visual representation of these modifications, making it easy to see exactly what was added, removed, or changed between two versions of a document.
Split View vs. Unified View
This tool supports the two industry-standard ways of visualizing changes:
- Split View (Side-by-Side): Displays the original and modified text in two parallel columns. This is often better for identifying indentation changes or structural shifts.
- Unified View: Shows all changes in a single continuous column, using green backgrounds for additions and red for deletions. This format is common in Git commit logs and pull requests.
Common Applications for Developers
- Code Review Prep: Quickly check your local changes against the main branch before submitting a PR.
- Config Auditing: Compare complex JSON or YAML configuration files between different environments (e.g., Staging vs. Production).
- Merge Conflict Resolution: Manually compare conflicting blocks of text to decide which changes to keep.
- Forensics: Identify exactly when and where a bug might have been introduced by comparing historical versions of a file.
Privacy and Security
Many online diff tools upload your text to a server for processing. This is a security risk for proprietary code or sensitive data. Our tool calculates the diff entirely locally in your browser using our optimized diffing engine, ensuring your data never leaves your machine.
🔒 Privacy Commitment
Like all tools in the Dev Tool Kit, this Diff Viewer operates 100% client-side. Your data is processed locally in your browser and is never sent to our servers. Privacy is not just a feature; it's our core architecture.