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ONLINE TOOL

Map relationships across data files

Locally compare multiple CSV/Excel files to propose likely join keys with coverage, cardinality and a report containing no raw values.

Local processingWorkToolset Pro
CONCRETE EXAMPLE

Five business exports

BEFORE
Customers, orders, payments, branches and products with no documentation
→
AFTER
Scored candidates: customer_id 1→N, product_code N→1, coverage and duplicate signals
PRIVACY

Your data stays in the browser

Processed content is not uploaded to WorkToolset. Required libraries may be loaded by the site, but the file stays in the browser.

GOOD TO KNOW

Limitations to know

  • A statistical match does not prove a business relationship: every key requires human validation.
  • PRO analysis samples up to 25,000 rows per table and 500,000 rows total; reports contain no raw values.
HOW IT WORKS

A straightforward workflow.

  1. 1Prepare the required input and choose useful options.
  2. 2Review previews, warnings and limitations before export.
  3. 3Download a new copy or report: the original stays unchanged.
PRIVACY

Frequently asked questions

Are my files uploaded to WorkToolset?

No. This tool runs locally in your browser.

Is my original file modified?

No. WorkToolset creates a new copy or export.

Do I need an account?

This tool is part of WorkToolset advanced features.

RELATED TOOLS

Continue the same workflow

XLS⇢Split Excel by column valueLocally create one XLSX or CSV file per distinct column value, with explicit limits and a split report.→JOINJoin two CSV filesPerform a VLOOKUP-style join between two files using a common key.→SQLLocal SQL LabQuery CSV, JSON and Parquet with DuckDB-WASM directly in the browser, then export results as CSV or Parquet.→ERDSQLite schema to ER diagramTurn SQLite tables, columns, primary keys and foreign keys into an editable Mermaid entity-relationship diagram.→
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 WORKTOOLSET PRO

When work becomes repeatable, Pro saves you time.

20×Batch processingPDF · Image · Data · Media
↻Reusable workflowsSteps · settings · templates
PDFProfessional reportsStructured reports · share-ready exports
▣Work continuitySessions · projects · history
100 presets · 50 projects · 20 templates · 500 favorites

Payments, taxes and invoices are managed by Paddle. Your documents are never part of payment data.
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