JSON Formatter, Validator & Viewer
Clean up strict JSON, diagnose syntax errors and move between readable code and a navigable tree without exposing your data.
JSON Input
Drop a .json file onto the editor, or paste JSON directly. Tab inserts the selected indentation.
Enter or upload JSON to view the result.
Your JSON is processed locally in your browser and is not uploaded.
How to use JSON Formatter, Validator & Viewer
- 1
Paste JSON, upload a local .json file or load the sample document.
- 2
Choose 2 Spaces, 4 Spaces or Tabs for indented output.
- 3
Click Format, Validate, Minify or Sort Keys according to the result you need.
- 4
Use the reported line and column to correct invalid syntax.
- 5
Inspect valid data as formatted code or a collapsible Tree, then copy or download it.
Frequently asked questions
About JSON Formatter, Validator & Viewer
JSON work alternates between machine efficiency and human understanding. Format applies chosen indentation, Minify removes optional spacing, Validate isolates syntax problems, and Sort Keys creates predictable object ordering without touching arrays. Primitive root values are accepted as strict JSON permits.
Parser feedback identifies a useful line and column rather than replacing invalid input. Once valid, the same data can be explored as code or expandable branches. Uploaded files, edits and downloads never leave the browser.