About this utility
How to use Dataset Row Diff Studio
Compare JSON-array or CSV datasets by a stable key and separate added, removed, changed, and unchanged rows.
What to provide
Paste a JSON array of objects or a header-based CSV dataset.
Use the same row-key field and compatible value types.
- Paste, type, or drag and drop a supported text file into the input area.
- Place the second value or file in the adjacent panel. Sensitive fields are masked by default.
- Choose the options that match your intended result.
- Select “Run tool” or press Ctrl/Command + Enter, then copy, download, or move the result back into the first input for another pass.
Use “Swap inputs” to reverse the comparison without copying either value.
What the result means
A keyed row-change table and summary counts without uploading either dataset.
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
- All input and output remains in this browser tab and is never uploaded or saved. Nested values are compared structurally; row order, numeric tolerances, fuzzy identity, and database relationships are not inferred.
Try the included example
Select “Load example” at any time to restore this tested sample.
[{"id":"A","stock":4},{"id":"B","stock":2}][{"id":"A","stock":5},{"id":"C","stock":1}]