Structure
Inconsistent field counts, empty headers, malformed quotes and unexpected final records.
See the table and how it became a table
A useful CSV viewer shows the data and the decisions used to parse it. CSVProof keeps UTF-8 and BOM status, delimiter, quoting, headers, newlines and structural warnings alongside the rows.
Private early access · macOS first
DataTransformCompareIssues 6RecipeRun report
EncodingUTF-8
DelimiterComma
QuotesDouble quote
NewlinesCRLF
HeaderRow 1
Row width2 issues
customer_idnameopenedaccount_ref
1001234Northwind AB03/04/268192004500000187
2001235Acme Goods2026-09-18004912
3001236Meridian Supply2026-09-19004915
1837 of 8 fieldsMalformed recordReview issue!
12,481 recordsValues displayed exactly as parsed6 issues
Opening a file is already an interpretation
A comma might be a separator or part of a value. A first row might be a header or data. The current Mac build validates UTF-8 and shows BOM status instead of guessing an unsupported encoding.
- Table plus raw field and record evidence
- UTF-8 validation and BOM status
- Delimiter and quote interpretation
- Header and newline decisions
- Row-width anomalies and malformed records
EncodingUTF-8no BOM · valid input
DialectComma + double quoteRFC 4180 pattern
Structure8 columns2 inconsistent rows
Value risks19 findingsidentifiers, dates, formulas
Runs locally in your browser
Get viewer accessFree CSV viewer
The local browser viewer is the first free tool in the CSVProof roadmap.
No file upload. No CSV content in analytics. The tool itself is reserved for the dedicated implementation round.
What the viewer is designed to reveal
Interpretation risk
Leading-zero values, long numeric-looking IDs, date-like strings and formula-like cells.
Parser confidence
Detected settings stay adjustable, and the preview updates when the contract changes.
Inspect once for free, save the contract when it recurs
The browser viewer is for understanding one file. CSVProof desktop carries that understanding forward: save parser rules, enforce them on the next delivery, review drift and keep the run evidence.
One fileView + inspectFree browser tool
→Every deliveryContract + replayCSVProof desktop
See what your CSV viewer should tell you
CSVProof is currently in private early access for macOS.
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