Text Diff Checker
Compare two texts and see the differences highlighted line by line. Additions are shown in green, deletions in red. Everything runs in your browser — nothing is sent to a server.
What Is a Diff Checker?
A diff checker compares two pieces of text and highlights the differences between them. It identifies which lines were added, removed, or left unchanged. Diff tools are essential for developers reviewing code changes, writers tracking document revisions, and anyone who needs to spot differences between two versions of text.
How to Use This Tool
Paste your original text on the left and the modified version on the right. Click Compare to see a line-by-line diff. Added lines appear in green with a + prefix, removed lines in red with a – prefix, and unchanged lines are shown normally. Use the Swap button to switch the two inputs, or Clear to reset both fields.
What Is a Text Diff Checker?
A diff checker compares two blocks of text or code and highlights the exact differences between them. Added content is shown in green, removed content in red, and unchanged content remains neutral. This is similar to how version control systems like Git display code changes.
When to Use a Diff Checker
Use this tool to compare code versions before and after changes, find differences between configuration files, verify document revisions, check translation accuracy, or debug unexpected changes in any text content. It works with all text formats including HTML, CSS, JavaScript, JSON, and plain text.
Everything runs locally in your browser — ideal for comparing sensitive code or confidential documents without privacy concerns.