Overview
ICS Calendar Toolbox is an easy and free online tool that runs in your browser.
What can this tool do?
Merge Multiple Calendars
Combine multiple ICS files from Google Calendar, Outlook, Apple Calendar, or other calendar apps into one unified calendar file.
Filter & Search Events
Filter events by keywords, date ranges, or event types. Extract only the events you need from large calendar files.
Fix Timezone Issues
Adjust event times for different timezones. Perfect for handling calendars from different countries or regions.
100% Private & Offline
All processing happens in your browser. Your calendar files never leave your device.
Common Use Cases
- 💼 Combine work and personal calendars into one file
- 📚 Extract specific events (e.g., all "meetings" or "classes")
- ✈️ Adjust calendar times when traveling across timezones
- 🗓️ Clean up calendar exports before importing to another app
- 📊 Merge multiple project calendars from different teams
Upload Your ICS Files
Upload one or more .ics calendar files to get started. You can drag and drop files or click to browse.
Drop ICS files here or click to choose
Supports multiple files at once
Filter & Options (Optional)
💡 How to Get Your ICS Files
- Google Calendar: Settings → Export → Download .ics file Settings → Export → Download .ics file
- Outlook: File → Save Calendar → Save as .ics File → Save Calendar → Save as .ics
- Apple Calendar: File → Export → Export File → Export → Export
- Other apps: Look for "Export" or "Download" options in calendar settings Look for "Export" or "Download" options in calendar settings
Your privacy matters: All processing happens locally in your browser. Your calendar files are never uploaded to any server. All processing happens locally in your browser. Your calendar files are never uploaded to any server.
ICS Calendar Toolbox
Merge multiple ICS calendar files, filter events by date range, convert formats and manage calendar data. Privacy-first calendar tool that works offline.
Productivity
How people use it
This browser-based tool is designed to be fast, easy to use, and private by default. Open the tool, adjust the settings, and get results instantly without creating an account or sending files to a server.
Everything runs locally in the browser whenever possible, which reduces friction for users and makes the page more useful as a direct-answer landing page from search.
Common topics
The following topics are closely related to this tool and help explain what it is for:
- online
- free
- no registration
- no signup
- browser
- web app
- instant
- easy
Quick answers
Is this tool completely free?
Yes, this tool is 100% free to use with no hidden costs, trials, or subscriptions required.
Do I need to register or sign up?
No registration or sign-up required. Simply use the tool directly in your browser.
Is my data uploaded to a server?
No, all processing happens locally in your browser. Your data never leaves your device, ensuring complete privacy.