A first check for recurring business files

Check the structure.
Before the handoff.

Catch missing headers, uneven rows and specification mismatches before a CSV reaches its next step. Choose the rules, run a local check and keep a concise report.

Runs in your browserNo account or uploadFree structure check

Your file specification

Make the expected shape explicit.

Use synthetic or non-sensitive business data only. Do not select or paste health information, PHI, credentials or other sensitive personal data. Processing stays in this browser; no file contents are uploaded or sent to AI.

Text files only: CSV, TSV or pipe-delimited, valid UTF-8, up to 1 MiB (1,048,576 bytes), 10,000 data rows and 100 columns. XLSX is not supported. This checks structure, not cell accuracy, malware or compliance.

Your input

Choose exactly one source. Changing the input clears the previous report.

Paste textChoose a local file

Delimited text Header row first

Keep the first row for headers. Standard double-quoted fields are supported. Formula-like text is treated as text and is never executed.

No text entered.

Delimiter

Choose the actual separator. The checker does not guess the format.

Expected structure

Required headers Required · one per line

Provide 1–100 names, up to 100 characters each. Case and spaces must match exactly; empty lines are ignored. Use the expected headers from your receiving specification.

Allow columns beyond the required headersRequire headers in the listed order

When extra columns are allowed, order checks the relative order of required headers.

Minimum data rows

Maximum data rows

A header-only file always fails, even with a minimum of zero. Locations refer to logical records, with the header as record 1; a quoted field can span several text lines.

No automatic saving. Reloading or leaving can lose your inputs. Clearing this page does not delete your original file or downloaded reports.

Structure reportBrowser-local

Ready for a check

Know what needs attention.

Set your requirements and check a file to see a clear structural result.

Confirm the expected column names.
Find missing headers and uneven rows.
Keep a report without the original data.

0Data rows

0Header columns

0Findings

What to review

Structural findings, with logical record and column locations where available
Location	Finding

What this result means

This check does not validate business rules, cell types, sensitive content or file safety. It never executes formulas or repairs the original file.

Reports include counts, rule codes and finding locations. They exclude the original filename, header names and cell values.

A focused first check

Structure first. Content review still matters.

Describe the contract.

Use the required headers and row limits from your receiving system. Delimiter and column order are explicit choices.

Surface the mismatch.

Deterministic checks identify structural problems. Malformed quoting, invalid text encoding and oversized inputs are rejected.

Keep the data local.

Checks run in browser memory. Reports give you locations and rule codes without copying the original cells.

For a recurring file handoff

Need a specification your team can reuse?

Ask about a scoped specification-setup engagement. We can agree the rules, deliverables and price before work begins.

Discuss specification setup ↗

Opens your email app. No file or report is attached.