Quick Summary
Online JSON Viewer is a free, private tool to parse, format, inspect collapsible object tree nodes, unescape string payloads, and convert JSON structures into clean YAML configurations locally inside browser RAM.
Online JSON Viewer & Interactive Tree Inspector
Parse, format, expand, and convert raw JSON payloads into visual tree nodes with 100% in-browser privacy.
Interactive tree navigation
Click object and array nodes to collapse or expand branches instantly with single-click key and value clipboard copying.
Escaped string cleaner
Automatically remove escaped quotes, slashes, and line breaks from API log dumps and stringified database records.
JSON to YAML Engine
Convert structured JSON data into human-readable YAML for Docker, Kubernetes, and OpenAPI configuration files.
Frequently asked questions
How does this online JSON viewer work?
Paste your JSON data into the source pane. The viewer parses the structure into an interactive collapsible HTML tree node view, allowing you to expand nested objects and copy keys or values with one click.
Is my JSON payload uploaded to external servers?
No. OnlineViewer Dev processes 100% of data locally within your browser memory using JavaScript DOM APIs. Zero payload data is transmitted over network requests.