Core transformations run locally in your browser.
Compare two texts side by side and highlight added and removed lines. Find differences in configuration files, source snippets, logs, or ordinary text directly in your browser.
Line-based, whitespace-sensitive comparison. Your text stays on this device.
The left editor is the original text and the right editor is the updated text. Red highlights identify removed lines on the left, and green highlights identify added lines on the right. A replaced line counts as one removal and one addition. Line endings and whitespace matter, so indentation changes are visible.
This tool compares the written lines, not their meaning. Moving lines or reordering object properties can therefore create differences. Use JSON Compare when you want structural and value differences independent of object key order. No input is uploaded, and editing either side clears the old comparison until you compare again.