Spreadsheets & data · ONLINE TOOL

Validate emails, phones & dates

Prepare CSV validation, map columns, review issues and normalizations, then download a reviewed copy.

Local processingNo account required

USE CASES

When to use Validate emails, phones & dates?

Prepare and validate a CSV containing emails, French phone numbers or dates: map columns, separate issues from valid normalizations, then review the copy before export.

Check a contact export before CRM import
Normalize French phones and dates without hiding invalid values
Produce a separate issue report alongside the reviewed CSV

CONCRETE EXAMPLE

Contacts export before import

BEFORE

email · phone · date · mixed formats with a few invalid values

→

AFTER

Column preflight · issues isolated · valid values normalized · CSV copy + separate report

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

Email validation is syntactic and does not check mailbox existence or deliverability.
Phone validation is deliberately limited to French 10-digit or +33 numbers.
Invalid values remain unchanged in the reviewed copy to avoid inventing corrections.

HOW IT WORKS

A straightforward workflow.

1Prepare the required input and choose useful options.
2Review previews, warnings and limitations before export.
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?

No for this free tool. Accounts are mainly used for favorites, presets and future workflows.