Free AI data tool · Quality
Dataset quality checker
Quick answer
Paste or upload a sample. You'll get field-by-field completeness, exact duplicates on fields you choose and a length distribution for a text field.
Your sample is processed in this browser. File contents are not uploaded.
Supported input
CSV, JSON array of objects or JSONL, up to 10 MiB or 25,000 records. Format is detected automatically.
How it works
Missing = key absent from a record. Null = value is null. Empty = empty or whitespace-only string, or empty array (CSV blanks count as empty). Percentages use the number of records examined. Duplicates are exact matches on the selected fields' JSON values. Length is character count (non-strings are measured as JSON).
Limitations
- There is no 'training-ready' score: the tool measures only what's in the sample.
- Near-duplicates, semantic accuracy, label correctness and rights are not assessed.
Questions
- What does the quality checker measure?
- For each field: how often it is missing, null or empty. It also counts exact duplicates on the fields you choose and shows text-length statistics. It does not give a made-up overall score.
- Is my file uploaded?
- No. The file is read and processed in this browser tab, and its contents are not sent to SourceX or anyone else. Closing the tab or pressing Reset clears it.
Learn the format
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