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Merge ICS files

Combine several calendar files into one, keeping every event.

10 / 10 free files today

Related tools

All Calendar tools →
Merge Excel filesCombine several workbooks into one, keeping every sheet and renaming on collision.Merge VCF filesCombine several vCard files into a single address book you can import once.CSV to ICSTurn a spreadsheet of dates into a calendar file any app can subscribe to.ICS to CSVTurn a calendar file into a spreadsheet of events, with real dates instead of ICS stamps.ICS to JSONExport calendar events as JSON, with each ICS timestamp converted to ISO-8601.ICS viewerOpen a calendar invitation or export and read its events before importing anything.Merge AudioJoin several MP3, WAV, M4A, FLAC or OGG files end to end, and download the result as MP3, WAV, M4A, OGG or FLAC.Merge PDFCombine several PDF files into one.

Merge ICS files is free to use as often as you like, directly from this page. You will find it under Calendar, with Merge Excel files and Merge VCF files for the neighbouring cases.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What is Merge ICS files?

Combine several calendar files into one, keeping every event.

When would I actually use this?

Getting events out of a calendar and into a spreadsheet you can count and filter, building an .ics from a list of dates, merging several calendars into one file, and reading an invitation without adding it to anything.

What is the most common mistake?

Treating a zoned time as if it were universal. A start written with a named zone carries a wall-clock time, and re-emitting it as UTC moves the meeting by whatever offset the converting machine happened to have. An all-day date suffers worse: turned into an instant it becomes midnight UTC, which is the day before anywhere west of Greenwich.

How is Merge ICS files different from Merge Excel files?

They sit next to each other but answer different questions: Merge Excel files is the one to open when you need it to combine several workbooks into one, keeping every sheet and renaming on collision. Pick whichever matches what you're starting from — both are free.

Is there a tool for the next step?

Merge VCF files is the closest one after this: Combine several vCard files into a single address book you can import once.

What else is worth having open alongside it?

CSV to ICS and ICS to CSV — they come up in the same task often enough to be worth a second tab.

Where do the figures come from?

Calendars are read against the published iCalendar specification, in the browser. The three things a conversion most often drops are carried through untouched rather than interpreted: the named zone, the all-day flag, and the recurrence rule that makes one entry stand for a whole series.

Further reading

All guides →
ExplainerThe Number 1 and the Text "1" Are Not DuplicatesDeduplication compares whole rows exactly, cell type included. Five identical-looking rows came out as three, because one held a number, one a string and one a string with a leading space.How-toAdding Page Numbers to a PDF When the Pages Are Rotated or Mixed SizesNumbering a tidy document is trivial. The cases that bite are a page turned sideways, a Letter sheet among A4 ones, a print file with bleed, and a document that already prints its own number. All four were tested: on the first three the number lands exactly where you asked, and the fourth is not detected at all.GuideWhat a PDF Says About You: Reading and Clearing Its MetadataA PDF carries its metadata twice, in two stores that can tell different stories, and neither of them is the whole story. Here is what is actually in the file, what clearing it removes, and the two things that survive every wipe.How-toTurning Notes into a PDF Worth ArchivingPlain text has no layout, so any converter has to invent one for you. Here is exactly which decisions this one makes — page, margins, font, line breaks — what it does with a tab and a long line, and what you have to add yourself before a note is worth keeping.GuideCutting and Joining Audio Without a Click at the JoinThat tick at the edit point is not a flaw in the software. It is a step in the waveform, and a step is broadband energy — which is the definition of a click. Here is the arithmetic, measured, and the two places you can put a cut so it never happens.ExplainerMP3, WAV, FLAC: What Each Conversion Actually DestroysOne of these formats stores the samples, one stores the same samples packed smaller, and one stores a guess about what you would have heard. Which conversions between them are free, which are merely expensive, and which are one-way doors — with the arithmetic for each.