free · in-browser · no upload
Drop your ICS file. We'll convert it to XLSX right here in your browser, your file never leaves your device.
Select your file here to get started
or drop your file here.
Accepts .ics, .ical, .ifb
How it works
Click the dropzone above or drag a ICS from your desktop. Files of any size, there's no upload, so there's no upload limit.
The conversion runs entirely in this tab using JavaScript and WebAssembly. Your file never touches our servers, we don't have any.
Get your XLSX the moment the conversion finishes. Convert another, or close the tab.
Your file is never uploaded. The entire conversion runs in your browser using WebAssembly. We can't see what you convert because we have no server to see it.
Server converters cap free users at 1-2 GB and gate larger files behind a paid plan. Since nothing uploads, our limit is whatever your browser can handle.
No account required. No watermark on the output. No queue. Drop a file, get a converted file.
Why convert ICS → XLSX
Calendar apps render .ics natively, but billing tools, attendance trackers, and analytics templates speak Excel. Get every event with start, end, location, and summary as columns you can pivot, filter, and total.
You billed by the meeting for last quarter. Export the project calendar as .ics, convert to XLSX, sum the duration column, send the invoice with line-by-line backup.
All-day events show a date but the timed column 'allDay' says true.
That is intentional: iCal DATE-valued events have no time component, so the start cell carries just the date and allDay flags it. Filter on allDay to separate the two event kinds.
Recurring events appear only once.
We export each VEVENT as it appears in the file. Recurrence rules are not expanded. For billing, export the date range from your calendar app so instances are already materialised.
Formats involved
ICS is a file format we support converting. Detailed format information is being added, for now, drop your file in the converter above and you'll get the conversion you came for.
How to open
Most operating systems open this format with a default application; if not, search for a free reader/viewer for the format.
XLSX is the spreadsheet format Excel has used since 2007, like DOCX, it's a zip containing XML for cells, formulas, formatting, and embedded objects. Replaces the older binary .xls format. Read and written by Excel, Google Sheets, Apple Numbers, and LibreOffice Calc, with high fidelity for standard cell data and reasonable fidelity for complex formulas and pivot tables.
How to open
Microsoft Excel, Google Sheets, Apple Numbers, LibreOffice Calc. CSV is a more portable format if you only need the raw cell values.
You may also need
Related tools
FAQ
Yes. No signup, no watermark, no daily file count limit. Every conversion runs in your browser, your file never touches our servers because there are no servers.
Nowhere. The conversion runs entirely in your browser using JavaScript and WebAssembly. Your file is never uploaded to our servers. We don't have any servers handling files, there's nothing for us to log, store, or accidentally leak.
Whatever your browser can hold in memory. Practically, this means a few hundred MB on most computers, significantly larger than the 1-2 GB caps that server-upload converters charge for. Very large files (multi-GB) may require closing other browser tabs first.
File interchange. Spreadsheets with formulas, formatting, multiple sheets. The most common reason to convert is compatibility, XLSX works in places where ICS doesn't, or vice versa.
Most operating systems open this format with a default application; if not, search for a free reader/viewer for the format.
Once the page is loaded, the conversion itself runs entirely offline. The first time you use a tool, your browser downloads the conversion library (a one-time cache). If you reload while offline, the page won't load, but you can install the site as a Progressive Web App for full offline use.
Single file at a time for now. Batch conversion is on the roadmap, for now, drop one file, download the result, then convert the next.
