Code Diff Viewer

Paste two versions of any code snippet and instantly see what changed. Choose between unified diff (GitHub-style) or split side-by-side view. Added lines are highlighted green, removed lines red. Shows exact +/- line counts. Runs 100% in your browser — nothing is sent to any server.

Frequently Asked Questions

How do I compare two code files online?▼

Paste the original code on the left and the modified version on the right. The tool instantly highlights additions (green), deletions (red), and unchanged lines. Switch between unified (GitHub-style) and split side-by-side views.

What is the difference between unified and split diff?▼

Unified diff shows changes in a single column with + and - markers, like GitHub pull requests. Split diff shows the old and new versions side by side in two columns, making it easier to compare line-by-line changes in longer files.

Can I use this to compare JSON, YAML, or SQL?▼

Yes. This tool compares any plain text — code in any language, JSON configs, YAML files, SQL queries, Markdown, or even plain prose. It works on a line-by-line basis regardless of the content format.

Is my code safe when pasting it here?▼

Yes. The diff comparison runs entirely in your browser. No code is sent to any server. Your source code stays completely private on your machine.

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