See what is inside an .ics calendar file without importing it into your calendar. Open an invitation or a full calendar export, browse it as a list or a month grid, expand repeating events, read every detail and convert the times to your own time zone.
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Files are opened on your device. Nothing is uploaded.
Calendar
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How to use the ICS File Viewer
Open the file: drop the .ics file on the box, click to choose it, or paste the calendar text. A sample calendar is shown first.
Browse in List view: events are grouped by day; click any event to see its full details, including the original time zone.
Switch to Month view to see the calendar as a grid. Use ‹ and › (or Page Up / Page Down) to change months and click a day to list its events.
Search and filter: type in Search to find events by title, place, notes or people, and tick Upcoming only to hide the past.
Change Show times in to read the whole calendar in another time zone, for example the zone of the place you are travelling to.
Reading an .ics file: what the viewer shows you
Calendar invitations and exports are text files in the iCalendar format. Each event is a block between BEGIN:VEVENT and END:VEVENT; the viewer decodes those blocks so you can read them like a calendar instead of raw code:
In the file
Shown as
SUMMARY, LOCATION, DESCRIPTION
Title, place and notes (escaped commas, semicolons and line breaks are decoded; web links become clickable)
DTSTART / DTEND or DURATION
Date and time range in your chosen time zone, plus the original zone
VALUE=DATE
All-day event (the exclusive end date is shown as the real last day)
RRULE
Every occurrence on its own date, with the rule in plain English ("Every month on the 1st Friday, 6 times")
EXDATE / RECURRENCE-ID
Cancelled occurrences removed; moved occurrences shown at the new time with a Changed badge
ORGANIZER / ATTENDEE
Names and email addresses of the organizer and guests
STATUS:CANCELLED
A Cancelled badge, useful for cancelled meeting invitations
VALARM
Number of reminders stored in the file
Time zones in calendar files
Most events are saved with a time zone, for example DTSTART;TZID=Europe/London:20260306T150000, which means 15:00 London time. Others are saved in UTC (a time ending in Z) or as "floating" times with no zone, which mean the same clock time everywhere. The viewer converts zoned and UTC times to the zone you choose, keeps floating times unchanged, and follows daylight saving rules from your browser's time zone database. A repeating 10:00 New York meeting therefore stays at 10:00 New York time across the March and November clock changes, and moves by an hour for viewers in places where the clocks change on other dates.
Outlook and Exchange often use Windows zone names ("W. Europe Standard Time") or custom zone definitions. Common Windows names are mapped to IANA zones automatically. If a file uses a zone the viewer cannot identify, it uses the offset defined in the file and shows a warning above the calendar.
Handy uses
Check an invitation before accepting: see the exact time in your zone, the organizer and the full guest list without adding anything to your calendar.
Inspect an export or backup: confirm that a Google or iCloud export contains the events you expect before importing it somewhere else.
Plan travel: switch Show times in to your destination's zone to see your schedule in local time.
Debug a generated feed: developers can paste .ics output from an app to verify recurrence rules, exceptions and time zones.
An .ics file is a calendar file in the iCalendar format (RFC 5545). It can hold one invitation or thousands of events. Calendar apps import it, but to just look inside without adding anything to your calendar, open it here: drop it on the page and every event is listed with its date, time and details.
Will opening a file here add events to my calendar?
No. The viewer only reads the file and displays it. Nothing is added to Google Calendar, Outlook or Apple Calendar and nothing is uploaded, so it is a safe way to check an unknown invitation or an export before importing it.
How are repeating events shown?
A repeating event is stored once with a rule such as every Monday, 10 times. The viewer calculates each occurrence, removes deleted dates (EXDATE) and shows moved or edited occurrences (RECURRENCE-ID) in their new place, marked Changed. Endless series are shown up to two years past today or the last event in the file.
Why are the times different from what the sender wrote?
Times are shown in the zone chosen under Show times in, which starts as your device's time zone. Open an event to see the original time and zone written in the file. Choose the sender's zone to see the times exactly as they wrote them.
Can I view an Outlook or Teams invitation?
Yes. Save the .ics attachment from the email and open it here. Outlook's Windows time zone names such as Pacific Standard Time are translated to standard IANA zones automatically.
How do I turn the calendar into a spreadsheet?
Use the ICS to CSV Converter on this site. It exports the same events, with repeats expanded if you want, into a CSV file for Excel or Google Sheets.
Does it work with large calendars?
Yes. Exports with several thousand events open in a second or two in a modern browser. Files up to 50 MB are accepted; the list shows 400 events at a time with a button to show more.
Are all the tools on FreeToolCabin tested for quality and accuracy?
Yes! Every tool on our site undergoes automated Q/A testing in real browser environments to ensure high precision, correct output, and zero errors. If you happen to spot a bug or have a suggestion, please contact us at [email protected] and our team will review it right away.