jsoneditor: JavaScript JSON Editor with Tree, Code & Text Modes
Add JSON editing to web apps with tree, code, text, form, view, and preview modes plus validation, search, and formatting.
JavaScript & CSS JSON Viewer
Render and Edit JSON as an Interactive Flowchart – SenangWebs Unfold
A vanilla JS JSON viewer and editor that renders JSON as an interactive flowchart graph with in-place editing, two-way sync, and pan/zoom.
Lossless JSON Pretty-Printer for JavaScript – fast-json-format
Pretty-prints JSON strings without parsing, preserving BigInt literals and decimal precision while handling malformed input gracefully.
Collapsible JSON Viewer with Syntax highlighting and Line numbers – TreeJSON
A zero-dependency JavaScript library that renders JSON data into an interactive, collapsible tree with syntax highlighting.