DataDoctor

Runs entirely in your browser — no uploads, no saved snippets, no public links.

Paste a file, inspect the issues, export reviewed output.

CSV workflow chooser

CSV tools for import-ready data

Pick the user problem first, then run the best preflight tool before uploading data to a shop, CRM, database or API.

User problem

Start with CSV Data Quality Checker

My CSV import is failing

Start with a broad preflight report before chasing platform-specific errors.

Best first tool

CSV Data Quality Checker

Best first pass for missing values, duplicate rows, mixed types and invalid formats.

What it checks

  • Missing required values
  • Duplicate rows
  • Mixed column types
  • Invalid emails, URLs and dates
Open CSV Data Quality Checker

User problem

Start with Shopify CSV Validator

I am importing products to Shopify or WooCommerce

Use platform presets when the target system has strict product, variant or SKU rules.

Best first tool

Shopify CSV Validator

Check product headers, duplicate handles, required fields and invalid variant prices.

What it checks

  • Required platform headers
  • Duplicate product identifiers
  • Variant price format
  • Option value gaps
Open Shopify CSV Validator

User problem

Start with HubSpot CSV Import Checker

I am importing contacts to a CRM or email platform

Use contact-specific checks before a HubSpot, Mailchimp or Google Contacts upload creates bad records.

Best first tool

HubSpot CSV Import Checker

Check email columns, duplicate contacts and invalid addresses before CRM import.

What it checks

  • Email column presence
  • Duplicate email addresses
  • Invalid contact methods
  • Missing name or identity values
Open HubSpot CSV Import Checker

User problem

Start with QuickBooks CSV Checker

I am importing bank transactions or accounting CSV files

Check transaction files for the fields and formats accounting tools expect before upload.

Best first tool

QuickBooks CSV Checker

Validate Date, Description and Amount columns plus duplicate transaction keys.

What it checks

  • Required accounting columns
  • Date parsing
  • Numeric amounts
  • Duplicate transaction rows
Open QuickBooks CSV Checker

User problem

Start with CSV Cleaner

I need to clean messy spreadsheet data

Find rows that should be fixed or removed before the file reaches a CRM, shop or database.

Best first tool

CSV Cleaner

Remove duplicate rows and optionally drop incomplete records.

What it checks

  • Duplicate records
  • Blank cells
  • Whitespace noise
  • Incomplete rows
Open CSV Cleaner

User problem

Start with CSV Validator

My CSV has mojibake, weird characters or spreadsheet copy-paste issues

Start with structural and quality checks so encoding damage, blank cells and delimiter problems are visible before cleanup.

Best first tool

CSV Validator

Check whether the file still parses into consistent rows and columns.

What it checks

  • Malformed rows
  • Unexpected delimiters
  • Blank or damaged cells
  • Whitespace and copied spreadsheet noise
Open CSV Validator

Tool directory

Browse every CSV tool

Use the directory when you already know the specific CSV task: validate structure, profile quality, remove duplicates, find blanks, clean rows, convert to JSON or prepare schema checks.

CSV

CSV Validator

Validate CSV structure, delimiter parsing, row consistency and malformed records.

Best for

checking CSV structure before you debug platform-specific import rules.

Rows and columnsMalformed quotes
Open tool
CSV

CSV Data Quality Checker

Profile CSV data for missing values, duplicates, invalid formats, mixed types, outliers and more.

Best for

profiling a CSV for import readiness before uploading it to a CRM, store, database or API.

Missing cellsDuplicate rows
Open tool
CSV

CSV Duplicate Finder

Find and audit duplicate rows or values by one or more selected columns before deciding what to remove.

Best for

finding duplicate CSV rows or duplicate business keys before removing anything.

Selected duplicate key columnsCase-insensitive matches
Open tool
CSV

Remove Duplicates from CSV

Detect duplicate rows and download a deduplicated CSV.

Best for

exporting a clean deduplicated CSV after selecting the columns that define a repeated record.

Duplicate key selectionFirst occurrence retention
Open tool
CSV

CSV Missing Values Checker

Find empty cells by column and row before importing or analyzing a CSV file.

Best for

finding blank cells by column and row before a platform rejects required fields.

Total missing cellsMissing cells per column
Open tool
CSV

CSV Cleaner

Clean CSV files by removing duplicates and optionally dropping incomplete rows.

Best for

removing duplicate rows and optionally dropping incomplete rows before downstream checks.

Header detectionDuplicate key column
Open tool
CSV

CSV to JSON

Convert CSV data into JSON arrays or objects.

Best for

converting spreadsheet-style rows into JSON for APIs, scripts or data review.

CSV header rowsFallback row arrays
Open tool
Schema

CSV Schema Generator

Infer a JSON Schema from CSV columns and values.

Best for

inferring a starter schema from representative CSV rows before creating a stricter import contract.

Column namesInferred field types
Open tool
Schema

CSV Schema Validator

Validate CSV rows against a JSON Schema.

Best for

checking CSV rows against a JSON Schema before import, migration or API upload.

Header-to-field mappingRow-level schema errors
Open tool