ICS to XZ Converter
Processing entirely on your device — large files may take a moment.
ICS is iCalendar — the format every calendar app exports: events with dates, locations, organisers and recurrence rules. Unpack XZ into ZIP/TAR for tools that cannot read LZMA2.
iLoveConverter processes everything locally on your computer, which makes it private and fast: no upload wait, no server storage, no limits. Add as many files as you like — batch conversion is built in.
How to convert ICS to XZ
- 1
Select your files
Select your ICS file.
- 2
Convert instantly
The file bytes are gzip-compressed in place — the same archive your server or build tool produces, made locally.
- 3
Download results
Download the .gz file — ready to upload, serve or attach.
About the ICS format
ICS is iCalendar (RFC 5545): the text format every calendar system imports and exports. Events carry start/end times, locations, organisers, attendees, alarms and recurrence rules — which makes an .ics attachment a small database of “what happens when”.
Flattening ICS to CSV turns that database into rows: one event per line with columns for time, place and summary — ideal for auditing a shared calendar, merging timetables or feeding a spreadsheet.
+Strengths
- ✓Universal calendar interchange
- ✓Carries recurrence and alarms
- ✓Plain text, easy to parse
!Limitations
- −Recurring events expand only on export
- −Timezones are easy to get wrong
About the XZ format
XZ wraps the LZMA2 algorithm: the best ratio of the common Unix compressors, which is why distribution packages and source releases pick it when bandwidth matters more than CPU.
Windows Explorer and many cross-platform tools cannot open it — unpacking to ZIP or TAR makes the payload portable.
+Strengths
- ✓Highest common ratio
- ✓Standard for Linux packages
- ✓Integrity checks built in
!Limitations
- −Memory-hungry at high settings
- −Sparse support outside Linux
Why convert ICS to XZ?
Converting makes sense where the strengths of XZ meet what ICS cannot give you. Highest common ratio Meanwhile Recurring events expand only on export One pass through the converter above puts your file on the right side of that trade-off.
Frequently asked questions
Is this ICS to XZ converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Is there a file size limit for ICS to XZ?
The only limit is your device's memory, since nothing is uploaded. Files up to a few hundred megabytes work fine on a modern desktop browser; very large files simply take a little longer.
What about folders and directory structure?
The full directory tree is preserved: folders stay folders, and deep paths arrive exactly as they were packed in the ICS file.
Are the files inside my ICS archive modified?
No. Contents are unpacked in memory and repacked into XZ byte-for-byte — the conversion changes the container, never the files inside it.