About this tool
Diff Checker is a free browser-based tool for comparing two text values and identifying added, removed, and unchanged lines. All comparison is performed locally in your browser.
Diff Checker
Compare two text or configuration files and quickly identify added, removed, and unchanged lines.
Original
Enter the original text or configuration.
Modified
Enter the updated text or configuration.
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Compare Text and Configuration Files
Paste an original version and a modified version into the two comparison panels to quickly identify what changed.
The comparison is performed line by line and highlights added and removed content so configuration changes, code updates, and text differences are easier to review.
Review Added and Removed Lines
Added lines are highlighted separately from removed lines, while unchanged lines remain visually neutral. A summary shows the number of added, removed, and unchanged lines.
This makes the tool useful for reviewing configuration changes, API payloads, YAML manifests, JSON documents, scripts, and other text-based files.
When to Use a Diff Checker
- Compare two versions of configuration files.
- Review changes to Kubernetes YAML or Docker configuration.
- Compare JSON, scripts, or source code snippets.
- Identify changes between API request or response payloads.
- Quickly inspect text differences without installing a desktop diff application.
Is the Comparison Performed Locally?
Yes. The comparison is performed entirely in your browser. The text you enter is not uploaded to ToolTunnel's servers.
This makes the tool suitable for quickly comparing configuration and development files while keeping the comparison data on your device.
Frequently Asked Questions
▶What is a diff checker?
A diff checker compares two versions of text and identifies which lines were added, removed, or left unchanged.
▶Can I compare code with this tool?
Yes. You can compare source code, configuration files, scripts, JSON, YAML, and other text-based content.
▶Does Diff Checker compare files character by character?
ToolTunnel's Diff Checker performs a line-based comparison, making it particularly useful for configuration files, code, and structured text.
▶What do the plus and minus symbols mean?
A plus sign indicates a line that was added in the modified text, while a minus sign indicates a line that was removed.
▶Is my text uploaded to a server?
No. The comparison is performed locally in your browser and the text is not sent to ToolTunnel's servers.