How do I compare two JSON objects online?

Paste the first JSON object into the left panel and the second JSON object into the right panel. Enable Normalize JSON to format both objects consistently before the line-by-line diff is calculated.

Does JSON diff ignore formatting?

When Normalize JSON is enabled, formatting-only differences such as indentation and spacing are removed. The diff then focuses on structural changes and value changes.

Can I compare API responses?

Yes. JSON diff is useful for comparing API responses across environments, releases, or test runs, especially when a field was added, removed, renamed, or changed.

Is invalid JSON supported?

Strict JSON is required for normalized comparison. If either side has comments, trailing commas, or unquoted keys, fix the syntax or disable normalization and compare it as plain text.

JSON Diff Checker

Compare two JSON objects online. Normalize formatting, spot changed keys and values, and review API payload differences.

Ignore whitespaceNormalize JSON

Original

Drop one file here. Supports TXT, JSON, CSV, DOCX, XLSX, PPTX, and PDF.

Changed

Drop one file here. Supports TXT, JSON, CSV, DOCX, XLSX, PPTX, and PDF.

For scanned PDFs or image-only files, copy the OCR text into the comparison panels before comparing.

Comparison results

Added: 0Removed: 0Changed: 0Unchanged: 0

Add content on both sides to compare.

JSON diff is a high-intent workflow for developers debugging API responses, configuration files, webhooks, feature flags, and test fixtures. Paste the original JSON on the left and the changed JSON on the right, then keep Normalize JSON enabled so both inputs are parsed and formatted consistently before comparison. This removes indentation and spacing noise, making key additions, removed properties, changed values, and array edits easier to review. Because parsing uses the browser's native JSON APIs, invalid JSON is flagged immediately and the data stays on your device.

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Online Diff Checker for Text, JSON, and Documents

Zolkit's Diff Checker compares two texts, code snippets, JSON payloads, Word files, Excel sheets, PowerPoint decks, and PDF documents in your browser. Use it to spot added, deleted, and changed lines without uploading sensitive contracts, drafts, API responses, or internal documents.

Browser-Only Privacy

Text comparison and supported document extraction run locally in your browser, so confidential drafts and legal files do not need to be uploaded.

Document Input

Drop DOCX, XLSX, PPTX, TXT, CSV, JSON, and PDF files, or paste text directly into the side-by-side panels.

JSON Diff Mode

Normalize JSON before comparing so formatting noise is removed and structural changes are easier to review.

Side-by-Side Results

Added lines are highlighted in green, removed lines in red, and changed rows are aligned for fast review.

Whitespace Control

Ignore whitespace when indentation or line wrapping should not count as a meaningful change.

Free to Use

Compare text and files without an account, installation, or per-document limit from Zolkit.

How to Compare Text or Documents

1
Paste text into both panels, or drop one supported file into each side.
2
Choose Text or JSON mode, then enable Normalize JSON or Ignore whitespace when useful.
3
Review the side-by-side diff where additions are green, removals are red, and changed rows are aligned.