01
Diagnose the structure
Find uneven rows, duplicate headers, malformed values, missing identifiers, and schema drift.
LOCAL CSV CHECKER · DATA QUALITY SERVICES
Catch bad data
before it travels.
Start with a private CSV check in your browser. When the job reaches beyond one file, get scoped help with Excel, JSON, cleanup, conversion, and import-ready delivery.
The free scan never uploads your file.It runs entirely on this device. No login or store access.
100%in-browser scan
2platform rulesets
0files retained
Drop your product CSV here
or choose a file — CSV UTF-8 recommended
Local scan limit: 10 MB · 100,000 data rows
Local scan only. Reports neutralize spreadsheet-formula prefixes before download.
CSV EXCEL JSON + JSONL DATA CLEANUP FORMAT CONVERSION FIELD MAPPING QUALITY REPORTS IMPORT PREP
ONE DATA QUALITY WORKFLOW
From suspicious source file to dependable delivery.
Use the free CSV checker for a fast first pass, or scope a human-reviewed job across tabular and structured data formats.
02
Clean and standardize
Resolve duplicates, missing values, inconsistent dates, numbers, categories, and field names.
03
Convert and deliver
Prepare CSV, Excel, JSON, or JSONL data for an agreed template, platform, API, or database.
HANDS-ON HELP
When a quick check is not the finish line.
Start with a non-sensitive description or redacted sample. Every engagement gets a written scope before files move or paid work begins.
01 / DIAGNOSE
Data quality review
A human-reviewed risk map for CSV, Excel, JSON, or JSONL data before anyone edits the source.
- 1 file · up to 10,000 rows
- Annotated issue report
- Priority repair plan
- 1 clarification round · no source edits
02 / REPAIRMOST REQUESTED
Dataset cleanup
A clean, traceable dataset prepared against agreed rules and an agreed output format.
- Up to 3 files · 25,000 rows total
- Cleaned working files + change log
- Final validation report
- 1 revision round
03 / MIGRATE
Import-ready delivery
Field mapping, format conversion, and reconciliation for data moving between systems.
- Volume and complexity quoted first
- Mapping plan + sample delivery
- Reconciled final package
- 2 milestone review rounds
Starting prices cover the listed baseline scope. Complex joins, custom scripts, sensitive data, rush work, or extra revisions require a written quote. Payment method and milestone schedule are agreed before work; this site does not collect payment or project files.
DATA HANDLING
Useful access, kept deliberately narrow.
The free scanner and a paid service engagement are separate. The scanner is local. Service files move only after scope and transfer method are agreed in writing.
Your file stays in the browser.
Parsing, checks, filtering, and report generation happen on this device.
- No account
- No upload
- No store credentials
Access follows the written scope.
Purpose-limitedOnly the fields required for the agreed job.
No silent AI useNo raw project data goes to an AI service without written approval.
Deletion scheduledWorking data is removed after acceptance on the agreed timetable.
Not accepted through this site: passwords, API keys, payment-card data, medical records, children's data, or private production links.
FROM FINDING TO DELIVERY
A small, auditable handoff.
Start with a safe sample
Share a redacted extract or run the local scanner. Do not send credentials or production links.
Lock the scope
Agree on inputs, output format, acceptance checks, timing, price, and revision limits.
Use a secure handoff
Move working files through a client-approved folder or time-limited download link.
Deliver, verify, delete
Receive the result, report, and change log. Project data is removed on the agreed schedule.
HONEST BOUNDARIES
A preflight is a seatbelt, not autopilot.
Data Preflight checks selected file and field rules. It cannot know your business intent, undocumented system behavior, or the live state of a destination platform.
Prepare a project briefSAFE IMPORT CHECKLIST
- Keep an untouched export of the live catalog.
- Test a small subset before a full import.
- Review changes that can alter product meaning.
- Use a staging store for migrations when possible.
REQUEST A SCOPE
Describe the job. Keep the data out.
Build a compact, non-sensitive project brief and email it directly to Data Preflight. A redacted sample can follow after the handling method is agreed.
Scope and timing before paid work No surprise change fees Acceptance checks in writing
Add a short description and confirm the safety check, then email contact@data-preflight.com.
FREE LOCAL CHECK