DievioContact CSV Column Mapper
Map the columns in any contact CSV to a consistent first name, last name, email, company, title, phone and domain format. Review missing fields before exporting.
How to use this tool
- Paste or load a contact CSV with a header row.
- Choose the source column for each output field.
- Review missing emails and export the mapped file.
A worked example
Input
Given name → first_name Work email → email Organization → company
Output
first_name,email,company Jane,jane@example.com,Example
You choose which source column supplies each standard field. Mapping preserves the source values.
What the result means
Check the column choices before exporting. Unmapped fields stay empty, and a warnings file records missing or unsupported-format emails without inventing values.
Mapping changes column names, not the accuracy of the source records. It does not invent missing values or guarantee compatibility with a specific CRM import.
Frequently asked questions
Does this fill missing emails or split full names?
No. It maps existing columns to output fields. It does not infer an address, enrich records or split a full-name column into independently verified first and last names.
Will the output import into my CRM?
The output uses a general contact schema. Check your CRM’s current required headers and field rules before importing; this tool does not guarantee a vendor-specific import format.
Is this free, and are my inputs uploaded?
Use this tool without an account, subscription or credits. Processing and file exports run in your browser; the tool does not upload your inputs or send emails. Clear inputs to remove the current data. Inputs are not saved when you reload the page.
Keep working with free tools
Lead List Quality Audit
Audit your own CSV for missing contact fields, duplicate emails and malformed addresses. See which rows need attention before importing or preparing outreach.
Open tool →CSV Splitter
Split a CSV by row count or by the value in a column. Preserve headers, quoted commas and multiline cells, then download each part separately.
Open tool →Mail Merge Preview
Preview an email template against your own CSV rows before sending. Find unknown variables and empty cells, with optional fallback values for missing personalization.
Open tool →