Accounting CSV validator
Import errors waste more time than conversions. Paste a CSV and this tool checks the things that actually reject or corrupt imports: encoding, ragged rows, date formats, unsigned amounts, duplicates, and cells that would execute as formulas.
Runs in this browser tab. Nothing you paste or open here is uploaded.
Limitations
- Validation is structural: it proves the file is well-formed for import, not that the values match the original statement. Reconcile for that.
- Header-name guessing covers common UK bank and accounting exports; unusual headers may need reading the results with judgement.
- Very large files are fine technically but slow to paste; validate a representative chunk if needed.