JSON Viewer: Pretty-Print, Validate, and Edit JSON
What it is
A JSON Viewer is a tool (web app, desktop app, or browser extension) that helps you read, format, validate, and modify JSON data quickly and accurately.
Key features
- Pretty-print / format: Converts minified or compressed JSON into readable, indented form.
- Tree view: Displays JSON as an expandable/collapsible hierarchy for quick navigation.
- Validation: Detects syntax errors and highlights the exact location of problems.
- Editing: Lets you modify values, add/remove keys, and insert nodes directly in the tree or text view.
- Search & filter: Find keys, values, or paths; filter results by matches.
- Collapsing/expanding: Collapse large sections to focus on relevant parts.
- Copy & export: Copy formatted JSON or export to file (e.g., .json, .txt).
- Sorting & schema support: Sort object keys and optionally validate against JSON Schema.
- Diff & compare (advanced): Compare two JSON files to show additions, deletions, and changes.
- Performance features: Handle large files with streaming/virtualization to avoid freezing.
Typical workflow
- Paste or upload JSON.
- Use the pretty-print/format action to make it readable.
- Switch to tree view to inspect structure and navigate quickly.
- Fix errors highlighted by the validator or edit values inline.
- Search for keys/values, then copy or export the cleaned JSON.
When to use it
- Debugging API responses during development.
- Inspecting large configuration files or logs.
- Preparing data for ETL, analytics, or integration.
- Teaching or learning JSON structure and types.
Tips
- Enable schema validation when integrating with strict APIs.
- Use keyboard shortcuts (where available) for faster navigation and editing.
- For very large JSON (tens of MB+), prefer viewers with streaming or file-based processing to avoid memory issues.
If you want, I can suggest five web-based JSON viewers or create a short how-to with keyboard shortcuts and examples.
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