✓ TestedWorks with CSV, Excel, Google Sheets → JSON-LD Schema
By dataclean.to team · 2026-02-12
Event management platforms generate duplicates when the same event is created on multiple ticketing sites, imported from partner calendars, and manually entered by different team members. A charity gala might exist as three separate events because the development team created one in Eventbrite, the marketing team posted another on the website, and a partner organization added it to their own calendar. dataclean.to matches event records by comparing titles, dates, venues, and organizer information to identify and merge duplicate event entries and their associated registrations.
The Problem
Duplicate event records create logistical chaos. Attendee counts become unreliable when registrations are split across duplicate event entries, making it impossible to plan catering, seating, and staffing accurately. Promotional campaigns directing traffic to multiple listings for the same event dilute conversion tracking and split the audience. Calendar feeds with duplicate events clutter subscribers' schedules and may cause attendees to RSVP to the wrong listing. Post-event reporting that cannot aggregate data from duplicate entries underrepresents attendance, revenue, and engagement metrics that are critical for securing future sponsorships and venue contracts. Schema.org Event structured data specification
How to Fix It
1
Export event data from all platforms
Pull event records from your ticketing platform, website calendar, partner event feeds, and internal planning tools. Include event title, date, time, venue, organizer, ticket price, registration count, and event URL.
2
Upload to dataclean.to
Upload the CSV. The tool normalizes event titles, matches date-venue combinations, and clusters records that describe the same event despite different naming or organizational sources.
3
Review duplicate event clusters
Examine groups of records flagged as the same event. The tool shows title variations, which platform created each entry, conflicting times or prices, and total registrations across all duplicate listings.
4
Merge into single event records
Consolidate confirmed duplicates into one event entry. Registration lists from all duplicate entries are combined to produce an accurate attendee count. The most complete event description and correct pricing are retained.
5
Export the clean event database
Download the deduplicated CSV and update your event management platform. Each event now has one listing with the true registration count, consistent details, and no confusing duplicate entries across platforms.
Frequently Asked Questions
How does the tool handle multi-day events with separate entries per day?
Events spanning multiple days may have per-day entries in some systems. The tool clusters entries with the same title and venue across consecutive dates, flagging them for review so you can decide whether to merge into a single multi-day event or keep daily entries.
Can it merge attendee lists from duplicate event entries?
Yes. When duplicate events are merged, the tool combines all registration data from each entry. Attendees who registered on more than one duplicate listing are deduplicated themselves, so the final list has no double-counted registrants.
What about virtual and in-person components of the same hybrid event?
The tool flags records with the same title and date but different venue designations, such as a physical address and an online meeting URL. You can decide whether to merge them into one hybrid event entry or maintain separate listings for each format.
Example: Input → Output
name
startDate
endDate
location
price
Tech Summit 2026
2026-06-15
2026-06-17
San Francisco CA
$299
tech summit 2026
June 15 2026
Jun 17 2026
San Francisco
CA
299
Red rows show common data quality issues. dataclean.to normalizes and generates JSON-LD automatically.