How do I validate and download a fixed file?

Open /fix, upload your .ics, review results, then use “Download fixed file” if it appears. Some issues cannot be auto-fixed.

Why won’t my calendar import?

Most import failures are due to missing or invalid required fields (e.g., DTSTART, VERSION, UID) or invalid time zones. Fix the first error shown or use the fixed download.

Help Center

Simple, non-technical guidance for fixing broken ICS files, understanding calendar import failures, and getting events back into Google, Outlook, or Apple Calendar quickly.

Fix an .ics now ICS validator Developer API docs

Common problems

Start here if something is broken right now

ICS file won’t import into Google Calendar or Outlook Fast troubleshooting guide

Common ICS import errors by calendar app Google, Outlook, Apple Calendar

Events appear at the wrong time Timezone mismatch / offset issues

Fix ICS timezone errors (TZID / VTIMEZONE) TZID validation + timezone repair

Outlook says VTIMEZONE is missing Outlook / Exchange compatibility

ICS validation failed or file is invalid Validation errors explained

How to open an .ics file and add it to your calendar User-facing how-to

Quick checklist for developers Production import/debug checklist

In-depth guides

Longer walkthroughs and reference material

ICS Validator: Validate an ICS File (and Fix Import Errors) Core validator guide

What Is an ICS File? (iCal / iCalendar .ics Explained) Format overview

Generate Correct ICS Files (Best Practices + Templates) Authoring guide

TZID=EST Is Invalid in an ICS File (Use America/New_York) Timezone reference

iCal Validator: Validate iCal / iCalendar (.ics) Files Alternative landing page

Validate & Fix ICS Programmatically (Node, Python, Bash) Developer automation

Fix “Invalid ICS File” Errors (Google & Outlook) Error reference

ICS Import Created Duplicate Events – How to Clean It Up Post-import cleanup

Getting started

Tip For a quick fix, go straight to /fix and upload your file — no deep reading required.

The basics

What is an .ics? It’s a calendar file format that stores events. Most calendar apps (Google, Outlook, Apple) can import it.
Validate & fix a file: Go to /fix, upload your .ics, review the results, and click Download fixed file if offered.
Is it safe? Files are processed in memory; results are not stored. See “Limits & Privacy” below.

Popular how-tos

Export from Google: Calendar settings → your calendar → Export → download .ics.
Export from Outlook: File → Open & Export → Import/Export → Export to a file → choose iCalendar (.ics).
Export from Apple Calendar: Select calendar → File → Export → Export… → save .ics.
Merge multiple .ics: Zip them and use the Bulk tab on /fix, or open each file in a text editor and copy events together.
Inspect events: Open the file in a text editor; each BEGIN:VEVENT…END:VEVENT block is one event.

Troubleshooting

Common error types explained

DTSTART / DTEND issues

Events need valid start and end values. Missing, malformed, or inconsistent timestamps are one of the most common reasons an ICS file fails to import.

TZID problems

Time zones need valid identifiers like America/New_York. Aliases, abbreviations, or missing VTIMEZONE blocks often cause cross-calendar failures.

RRULE errors

Recurring events need valid recurrence rules such as FREQ=DAILY. Broken RRULE values may import partially, repeat incorrectly, or be rejected outright.

UID / PRODID missing

Missing IDs can make events hard to track or de-duplicate. CorrectICS can generate safe defaults when repair is possible.

Limits & Privacy

Privacy first Files are processed in memory; we do not store your calendar.

Retention

We do not persist your uploaded calendar. Logs store minimal request metadata (request ID, status) for operations and abuse prevention.

Encryption

Data is encrypted in transit (HTTPS). At rest, only minimal logs live in provider systems.

Size limits

Typical files up to a few MiB work. Very large or unusually complex calendars may be refused for safety.

Billing & Accounts

Free vs paid: Free runs the validator and shows issues. Paid plans add repaired-file workflows and automation features. See pricing for the full breakdown.
Receipts & refunds: Manage billing from /account. For billing questions, contact us.
Cancel anytime: You can downgrade or cancel from the account portal.

View pricing Go to account

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