Welcome to the simplest and fastest way to compare two text files online. Whether you are a developer debugging code, a writer checking revisions, or simply looking to find changes in a document, our Diff Checker highlights every modification instantly.
Perfect for developers and data analysts. Paste snippets from any programming language or file type (including JavaScript, Python, JSON, XML, YAML, SQL, or System Logs) to spot bugs and configuration changes immediately.
We value your data security. Your data never leaves your device. We use a client-side diff algorithm ensuring your text inputs are never sent to or stored on our servers.
Great for writers and editors. Find changes in essays, articles, or lists. Use the Split View to see side-by-side changes or Unified View for a merged summary.
Powered by efficient local libraries, this tool handles large text blocks without lag. Paste, click generate, and see the difference immediately.
Is this Diff Viewer free?
Yes, this tool is completely free to use for unlimited
comparisons.
Do you see my code?
No. The comparison logic runs entirely on your device. We do
not transmit your text input to any server or database.