Code Diff is a free tool to compare text, code, and JSON online. Paste “Original” and “Modified” content, then view differences side-by-side or as a unified diff. No sign-up and no uploads: everything runs in your browser.
patch generation; copy/download with correct line breaks.Yes, it works great with plain text, source code, and JSON. Choose side-by-side or unified diff view.
No. Everything happens in your browser. No text is sent or stored.
You can copy the diff or download changes.patch with correct line breaks.
Code Diff is an online tool to compare code, text, or JSON instantly. It’s ideal for developers, writers, and translators who need to find differences between versions of text files.
Unlike other diff tools, Code Diff runs fully in your browser — no uploads, no privacy risk, and no limits.