Universal Multi-Format Diff Tool

Compare JSON, YAML, Plaintext, and Markdown documents with side-by-side and unified views. 100% private in-browser diffing.

Ignore SpacesIgnore Case

Original (Left)Paste or edit

Modified (Right)Paste or edit

 {
   "database": {
-    "host": "db-primary.internal",
-    "port": 5432
+    "host": "db-cluster.internal",
+    "port": 5432,
+    "ssl": true
   },
   "enabled": true,
   "endpoints": [
     "/v1/charge",
-    "/v1/refund"
+    "/v1/refund",
+    "/v1/webhook"
   ],
   "service": "payment-gateway",
-  "timeout": 5000,
-  "version": "1.4.0"
+  "timeout": 7500,
+  "version": "1.5.0"
 }

+4 Added-2 Removed~3 Modified

JSON Diff|100% Client-Side

Modern Multi-Format Diffing: JSON, YAML, Plaintext & Markdown

Diffing is the foundation of software revision control, API contract monitoring, and infrastructure-as-code management. However, diffing structured configuration files (JSON, YAML) requires fundamentally different algorithmic approaches compared to diffing natural text or Markdown documentation.

01. Format Capabilities & Semantic Highlights

JSON Diffing

Normalizes key order and evaluates AST properties semantically to eliminate false positives caused by key reordering.

YAML Diffing

Compares Kubernetes deployments, Helm charts, and Docker Compose files while standardizing scalar values and mappings.

Text Diffing

High-performance Myers LCS algorithm identifies line insertions, line deletions, and word-level modifications.

Markdown Diffing

Compare documentation revisions, README changes, and changelogs with line-by-line formatting preservation.

FAQ

What file formats can I compare with the Universal Diff Tool?

You can compare JSON documents, YAML configurations (such as Kubernetes manifests and Docker Compose files), Plaintext documents, and Markdown specifications. You can switch formats with one click.

What is the difference between Side-by-Side (Split) and Unified (Inline) diff view?

Split view displays the original and modified documents side by side in two columns with aligned line numbers. Unified view merges all lines into a single vertical sequence, using green (+) badges for additions and red (-) badges for deletions.

Can I ignore spaces and letter casing when diffing?

Yes. Use the 'Ignore Spaces' toggle to disregard whitespace variations, and 'Ignore Case' to perform case-insensitive text and configuration comparisons.

Is my comparison data secure and private?

Yes, 100%. The Universal Diff engine executes entirely client-side inside your browser via local JavaScript algorithms. No text, source code, or configuration files are ever sent to remote servers.