01
Choose your CSV
Choose one UTF-8, comma-separated calendar CSV up to 1 MB from your device.
Business Tools
Google Calendar CSV Import Prep
Validate calendar rows and download a Google Calendar-ready CSV or one-time ICS file without guessing dates.
Use a comma-separated UTF-8 file up to 1 MB. Google Calendar requires English headers and comma-separated fields.
Your CSV stays in your browser. It is not uploaded to our servers.
Data handling
Storage and export controls
- Retention
- The tool's working state is kept only while this page is open. Inputs and results are not saved to persistent storage by Got A Tool.
- Export
- The tool may prepare a result after you run it. It downloads or copies it only when you choose that action.
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How it works
Prepare calendar events in three steps
02
Map columns and dates
Choose the columns and one date format for the whole file, then review every exception by source row.
03
Choose your download
Download valid events as Google Calendar CSV or one-time-event ICS.
Example
Keep the intended date clear.
If your source uses 17/06/2026, choose DD/MM/YYYY once. The export writes the Google-ready date as 06/17/2026, without guessing a different interpretation for another row.
Required fields
Every ready event has a Subject and Start Date. Timed events also need a valid Start Time.
Duplicates surfaced
A repeated title and start date is flagged with the earlier source row before import.
Exact output schema
The download uses Subject, Start Date, Start Time, End Date, End Time, All Day Event, Description, Location, and Private.
Local preparation
The CSV is parsed and generated in the browser, without uploading your events.
Questions
Common questions
Which columns are required?
Subject and Start Date are required by Google Calendar. This tool requires a Start Time only when the event is not marked all-day.
Why must I choose a date format?
Dates such as 06/07/2026 can mean June 7 or July 6. One explicit choice keeps every source row consistent instead of silently guessing.
Why does the tool stop at 1 MB?
Google Calendar documents a 1 MB maximum for imported CSV and iCalendar files. The tool applies the same limit so a ready download remains within Google’s stated file-size limit.
Can it create an ICS file?
Yes. It creates one VEVENT for each ready source row and preserves the local clock time without guessing a timezone. Recurring events and timezone definitions stay outside this version’s scope.
Are ICS text fields escaped safely?
Yes. Commas, semicolons, backslashes, and line breaks in event titles, descriptions, and locations use the RFC 5545 text escaping rules.
Are my calendar events uploaded?
No. The CSV is read, checked, and generated locally in your browser. Got A Tool does not receive or store its contents.
Practical guide
Read the Calendar import checklist
Review timezones, recurring events, and the receiving calendar's preview before you import or share a working copy.
Open the guide →Keep working
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