CSVProof

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 encoding, delimiter, quoting, headers, newlines and structural warnings alongside the rows.

Get early accessSee the inspection surface

Private early access · macOS & Windows

Product previewTable with visible parsing
CSVProof
Local file
vendor-september.csv×
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. Bytes might be UTF-8, Windows-1252 or something else. CSVProof exposes those decisions instead of burying them behind a table.

  • Raw and table views
  • Encoding and BOM detection
  • Delimiter and quote rules
  • Header and newline decisions
  • Row-width anomalies and malformed records
EncodingUTF-8no BOM · high confidence
DialectComma + double quoteRFC 4180 pattern
Structure8 columns2 inconsistent rows
Value risks19 findingsidentifiers, dates, formulas
Runs locally in your browser

Free 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.

Get viewer access

What the viewer is designed to reveal

Structure

Inconsistent field counts, empty headers, malformed quotes and unexpected final records.

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 and Windows.

Get early access