JSON Tools
Free tools for working with JSON in your browser. Explore any document as a collapsible tree with the JSON Viewer, re-indent it, repair invalid JSON, compare two versions, and convert lists and Java .properties files. Nothing is uploaded: every tool runs locally.
All JSON tools
JSON ViewerView JSON as a collapsible tree, table or formatted text. Search keys and values, copy any path, and open files or URLs. Runs entirely in your browser.JSON PrettifierFormat messy JSON into a readable, indented structure. Supports JSON and JSONL.Fix JSONRepair broken or invalid JSON — trailing commas, single quotes, comments, unquoted keys, Python literals — then format it.Compare JSONDiff two JSON documents by value and see every added, removed, and changed field with its path.List to JSONConvert a text list (one item per line or comma-separated) into a JSON array, with optional number/boolean detection.JSON to ListConvert a JSON array or object into a plain text list — values, keys, or key: value entries.Properties to JSONConvert Java .properties files to nested JSON. Supports custom separators and array formats.
Which JSON tool do I need?
| I want to… | Use |
|---|---|
| Explore an API response or a large JSON file | JSON Viewer |
| Re-indent minified JSON or JSON Lines | JSON Prettifier |
| Repair trailing commas, single quotes or comments | Fix JSON |
| See what changed between two JSON documents | Compare JSON |
| Turn a JSON array into a plain list | JSON to List |
| Turn a text list into a JSON array | List to JSON |
| Convert Java .properties files to JSON | Properties to JSON |