Text Compare & Side-by-Side Diff Checker
Compare any text side by side: plain text, JSON, logs, code, configs, or pasted API responses. Tune comparison rules, then inspect line and word changes.
Add text in A and B, or load a sample. All string types use the same line diff — JSON gets optional semantic normalization when both sides parse.
📖 How to Use
Paste the original version of your text into Box A. Paste the revised/new version into Box B. The differences will be highlighted automatically. You can switch between Split (side-by-side) and Unified views, customize rules (trim whitespace, ignore casing, normalize JSON), and jump between differences using the floating control bar or keyboard shortcuts.
🛡️ Why Use This Tool
Comparing codes, logs, or string files manually line by line is slow and error-prone. This tool automatically aligns lines and highlights word-level additions and deletions. JSON data can be normalized so that key order differences do not trigger false diff reports. Processes are executed client-side to keep your code private.