calendr.events

Fix / calendar toolbox

ICS Validator

Check the whole file without making any changes.

Processed in your browser

Opening your local workspace…

How it works.

  1. 01Open or paste an ICS file.
  2. 02Read the overall report of errors, warnings and information.
  3. 03If you want changes, continue to ICS Repair with the same calendar.

The important details.

Read-only checks cover structure, required fields, dates, recurrence, timezone references, event identity and ordering. Unparseable structure is rejected at loading. This is a practical validator, not a claim to cover every RFC extension or provider rule.

A good question.

Can Validator repair my file?

No. It only reports findings. Use ICS Repair for explicit corrections, or a focused checker when you want to investigate one area.

Keep going.

All tools →

Fix

ICS Repair

Review problems, choose explained repairs and save a corrected calendar copy.

Fix

UID Checker

Distinguish missing IDs, duplicates, revisions and recurrence overrides.

Fix

Timezone Checker

Find missing timezone definitions and ambiguous floating timestamps.

Your file stays in this browser tab. No account, no calendar upload, no calendar-content storage. Read our privacy approach.