Diff Tools — Compare JSON, OpenAPI, GraphQL, YAML, HAR & More

Compare two versions of JSON, OpenAPI, GraphQL, Kubernetes YAML, Terraform, Postman collections, and HAR files. Client-side only, no data sent to server.

The Diff hub is for structural and textual comparison of configs, APIs, and captures. Pick a specialized diff when available (JSON, OpenAPI, HAR) for smarter output than plain line diff; fall back to text diff for arbitrary formats. Pair with Formatter tools to normalize both sides before comparing.

Frequently Asked Questions

Which diff should I use for REST APIs?

OpenAPI or Swagger diffs highlight path and schema changes. For raw payloads, use JSON Diff.

Are my files uploaded?

No. Comparison runs in your browser for client-side tools.

What about AI diff explainer tools?

Those send your diff to our server for summarization; avoid confidential content.