高度な分析でJSONファイルを比較し違いをハイライト
プロフェッショナルツール
View both JSON documents side by side with differences highlighted in color for easy scanning
Detects changes at every nesting level — added keys, removed keys, modified values, and type changes
Understands JSON structure so reordering keys doesn't show as a change, only actual data differences
Shows a count of additions, deletions, and modifications so you can quickly assess the scope of changes
Export the diff results to share with teammates or include in pull request reviews
Comparison runs entirely in your browser — your JSON files are never uploaded to any server
よくある質問
JSON objects are unordered by specification, so our tool compares by key names, not position. If the same keys contain the same values in a different order, no difference is reported. This matches how JSON parsers actually work.
Yes — paste any two JSON documents and the tool highlights every difference. This is useful for comparing API responses between environments (staging vs production), before and after a code change, or across API versions.
Added keys (present in right but not left), removed keys (present in left but not right), modified values (same key, different value), and type changes (e.g., a string changed to a number). Each type is color-coded differently.
Yes, the tool handles files up to 100MB. For very large comparisons, results may take a moment to compute. The diff algorithm is optimized for deeply nested structures common in API responses and config files.
Absolutely. Common uses include comparing config files between environments, verifying database migration outputs, checking API response changes after deployments, and reviewing JSON schema evolution over time.