FileSpecGuard For your team

CONFIDENCE BEFORE THE HANDOFF

Small file issues.
Catch them before the rework.

Missing headers. Uneven rows. The wrong structure. Check your file against the rules you expect, before it reaches the next system.

Check a file See how it works
Free structure checkNo account neededFiles stay in your browser
STRUCTURE BEFORE INGESTIONA clearer handoff.
01
Bring your file

CSV, TSV or pipe-delimited text

02
Make the rules explicit

Headers, order and row structure

03
Keep the findings

A local report without cell values

Your data stays on your device.

THE WORKSPACE

One file. One clear check.

See it in action

Local by design. No file contents are uploaded or sent to AI. Use synthetic or non-sensitive business data only. Do not select or paste health information, PHI, credentials or sensitive personal data.

Your input

Your input

Bring the file you want to check.

No text entered.

Standard double-quoted fields are supported. Formula-like text is treated as text, never executed.

Choose the actual separator. Format is not guessed.

Supported files & limits

UTF-8 CSV, TSV or pipe-delimited text. Up to 1 MiB (1,048,576 bytes), 10,000 data rows and 100 columns. XLSX is not supported. Choose exactly one source.

Expected structure

Expected structure

Make the receiving rules explicit.

1–100 names, up to 100 characters each. Case and spaces must match exactly; empty lines are ignored.

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

How rows are counted

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.

Changing any input clears the previous report.

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

A BETTER FIRST CHECK

From uncertainty to
a specific next step.

A structural pass covers your selected rules. It does not certify cell accuracy, file safety or production readiness.

01 / DEFINE

Start with the contract.

Use the expected headers and row limits from the receiving system. You choose the delimiter and column order.

02 / INSPECT

Find the mismatch.

Get deterministic findings for structural problems. Malformed quoting, invalid encoding and oversized inputs are rejected.

03 / HAND OFF

Keep useful evidence.

Export a concise report with counts and rule locations. Review the original file separately, correct it and check again.

MAKE CHANGES EXPLICIT

Map columns. Review schema changes.

Approve local column mappings with a transformed preview, or compare two declared schema snapshots. This separate workspace exports the data you explicitly choose to transform.

Open mapping and schema review

Browser-local. No automatic saving.
No source connections or scheduled monitoring.

FOR RECURRING FILE HANDOFFS

Get a specification your team can reuse.

USD99 once for up to three CSV, TSV or pipe-delimited file families. Receive intake instructions and synthetic examples immediately. We prepare your custom specification settings and reviewed mappings within five business days after the scope, usable synthetic inputs and start date are confirmed.

Use fictional rows and nonconfidential headers only. This is a manual service with custom delivery by email.

View the USD99 service

See deliverables and terms on Payhip.
No subscription. The browser checker stays free.