Why use a private calendar converter?

Calendar files can contain schedules, locations, descriptions, and sensitive personal or work context. Local browser processing avoids sending those rows to an upload-based conversion service.

What does local processing mean here?

The page reads the selected file in the browser and generates the converted download there. The converter is not an external calendar API.

Does private processing preserve every calendar property?

No. Privacy and field preservation are separate concerns. The basic workflow focuses on common VEVENT fields and has limits for recurrence, time zones, attendees, reminders, and custom properties.

Local calendar processing

Convert Calendar Files Privately in Your Browser

CalendarFlow converts common ICS and CSV event data without a remote conversion API. That can be useful for personal schedules, client appointments, internal planning, and other calendar files that should not be uploaded for a simple format change.

Open the private converter See supported fields

What stays local

The selected file is read by browser JavaScript. CalendarFlow parses common event fields, renders a preview, and creates a CSV or ICS download locally. The page does not transmit the calendar rows to a conversion endpoint or connect to a calendar provider.

Local processing reduces the exposure created by upload-based converters, but it does not make the source file automatically safe. Use a trusted device, review downloaded files, and consider the sensitivity of descriptions, locations, and schedules.

How the private workflow works

Select an ICS or CSV file under the 10 MB limit.
Let the browser parse common title, date, location, description, categories, recurrence, and UID values.
Review the event count and visible preview.
Choose the opposite format and download the result locally.

Good fits for this workflow

Reviewing an exported calendar without handing it to an online converter.
Turning a small CSV schedule into an ICS file for a local import test.
Creating a spreadsheet view of events before manual cleanup.

Privacy does not mean perfect preservation

The basic converter is intentionally focused. It does not promise preservation of every VTIMEZONE definition, attendee, organizer, alarm, reminder, exception, attachment, conferencing link, or custom property. Recurrence rules may be carried as text, but occurrences are not expanded.

Review time zones, all-day values, daylight-saving transitions, and provider-specific behavior after conversion. CalendarFlow is a local file converter, not a synchronization service.

CalendarFlow overview · CSV to ICS · Export events to CSV

Private calendar converter questions

Are analytics or ad scripts part of conversion?

No. The converter page uses a local-processing architecture and does not add third-party analytics or advertising scripts.

Can I use this for a large calendar archive?

The current basic workflow rejects files over 10 MB and previews only the first 200 events. Test a representative file before relying on it for a larger archive.

Will local conversion remove all privacy risk?

No. It avoids uploading the selected file through this converter, but device security, browser extensions, destination applications, and the contents of the exported file still matter.

Suite homepage · Pricing · Account access · Privacy · Security