About this utility
How to use JSON Repair with Patch Preview
Repair comments, a byte-order mark, and trailing commas without guessing missing business data.
What to provide
Paste almost-valid JSON. Repairs are intentionally limited and disclosed.
- Paste, type, or drag and drop a supported text file into the input area.
- Review the input and the clearly labeled output behavior.
- Select “Run tool” or press Ctrl/Command + Enter, then copy, download, or move the result back into the first input for another pass.
What the result means
Produces a bounded, inspectable json repair with patch preview result locally.
Privacy and safety
This utility is loaded as browser code and processes your input only in this tab. OmniCastConverter has no upload endpoint and never stores your content, filenames, tokens, or secrets. Generated markup and code are shown as inert text and are never executed.
Limitations
- It does not invent missing quotes, keys, brackets, or values; ambiguous syntax is rejected.
Try the included example
Select “Load example” at any time to restore this tested sample.
{
// feature flag
"enabled": true,
}