What is an .ics file?

An .ics is a universal calendar file format used by Google, Outlook, and Apple Calendar to exchange events.

How do I validate and download a fixed file?

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

Simple, non‑technical guidance for using CorrectICS.

Tip For a quick fix, go straight to /validate and upload your file.

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 /validate, 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.

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 /validate, 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.

DTSTART/DTEND issues

Events need start/end. If missing, we flag it; the fixed file may add safe defaults where possible.

TZID problems

Time zones must be valid (e.g., America/New_York). We normalize common aliases when safe.

RRULE errors

Repeating rules must be valid (e.g., FREQ=DAILY). Broken rules are highlighted so you can edit or remove them.

UID or PRODID missing

We can generate these with safe values to help your calendar import the file.

Why won’t my calendar import?

Check the first error in the validator results—fixing that often resolves the import. Try the fixed download if available.

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 complex calendars may be refused for safety.

Free vs Pro: Free runs the validator and shows issues. Pro adds automation and API features, with options to include a repaired file.
Receipts & refunds: Manage billing from /account. For billing questions, contact us.
Cancel anytime: You can downgrade or cancel from the account portal.

Send us a message and include your X-Request-Id if you have one.