How to use JSON Viewer
Paste JSON, then format, validate and inspect the nested structure. Correct any reported syntax position before copying the result.
What the tool does
Paste JSON to format and inspect its structure, identify syntax problems and work with readable data in your browser.
Supported inputs
JSON text pasted into the editor. Standard JSON requires quoted property names, valid commas and no comments or trailing commas.
Actual output
A validated, formatted JSON view with an expandable structure and syntax feedback when the input is invalid.
Privacy and processing
Processing runs locally unless the tool clearly requests a public network resource.
Limitations
Very large JSON documents can use substantial browser memory. Comments and trailing commas are not valid standard JSON.
Common mistakes
Check quotation marks, commas, brackets and braces around the reported error position. Do not paste production secrets into sample JSON.
Frequently asked questions
What can I use JSON Viewer for?
Paste JSON to format and inspect its structure, identify syntax problems and work with readable data in your browser.
What input does JSON Viewer accept?
JSON text pasted into the editor. Standard JSON requires quoted property names, valid commas and no comments or trailing commas.
What should I check after using JSON Viewer?
Very large JSON documents can use substantial browser memory. Comments and trailing commas are not valid standard JSON.
Related tasks and guides
- JSONPath Tester — Run a JSONPath expression against pasted JSON and inspect the matched value or any parsing and evaluation error.
- URL Encoder/Decoder — Encode or decode URL components containing spaces, symbols and Unicode text.
- Base64 Encoder/Decoder — Encode UTF-8 text to Base64 or decode Base64 back to readable text.