ICS は予定表データの標準形式です。予定・参加者・繰り返しを記述し、カレンダーアプリで読み込めます。
Typical use: 予定表を CSV に変換して一覧確認や集計に使います。
About the ICS format
ICS は予定表データの標準形式です。予定、参加者、繰り返し、リマインダーを記述し、カレンダーアプリに読み込めます。
一覧で確認したり集計したりするには CSV への変換が便利です。予定の共有は ICS のままが確実です。
Strengths
- ✓ 主要カレンダーが対応
- ✓ 繰り返し予定を表現できる
- ✓ 参加者や場所も含む
Limitations
- ✗ 人が直接は読みにくい
- ✗ アプリごとの解釈差
- Structure
- VEVENT / VTODO blocks
- Types / schema
- Dates, durations, text props
- Compatibility
- Google, Outlook, Apple Calendar
- Best for
- Schedules and event lists
Convert ICS to…
1 direct directions plus 3 workflows, sorted A–Z; 🔥 marks popular targets.
Cross-engine workflows
Convert other files to ICS…
Frequently asked questions
What is a ICS file?
ICS is iCalendar — the format every calendar app exports: events with dates, locations, organisers and recurrence rules.
How do I convert ICS files online?
Pick a target format from the "Convert ICS to…" list below, drop your file and hit convert. Everything runs in your browser — no install, no upload, no watermark, no limits.
Is it safe to convert ICS files here?
Yes. Every conversion is performed by your own device inside the browser — files never leave for a server, and the page keeps working even offline.
Which formats can ICS convert to?
This page lists all 4 directions across documents, images, audio, video, spreadsheets and archives — each one is its own free converter page.