Javascript library to create or read tar files in the browser
Switch branches/tags
Nothing to show
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.


Javascript library to create or read tar files in the browser


It is often necessary to pack data into single files in the browser (e.g. creating a "project" file consisting of images+data in WebPlotDigitizer). One way is to create simple tarballs with all the data. There are a few existing libraries that do this, but this seems easy enough to do so I decided to do make my own library for learning purposes.


There are a few known limitations with this library:

  • Browser only, no support for NodeJS.
  • File name (including path) has to be less than 100 characters.
  • Maximum total file size seems to be limited to somewhere between 500MB to 1GB (exact limit is unknown).

Some benefits of using this library:

  • Code is a lot cleaner than most other implementations that I can find.
  • Unit tests for read and write.

Browser Support

This works fine on any recent version of Chrome, Firefox or Safari. To test your browser, run the unit tests here:

Running Unit Tests

For Chrome, the test page has to be hosted on a HTTP server. An easy way is to use Python:

In the root directory of this project, do:

python -m SimpleHTTPServer 8000

Then browse to http://localhost:8000/tests/

For a quick test, you can visit:

In Firefox, you can simply load tests/index.html without starting a web server.

Other Implementations

If you are aware of other implementations, then please let me know :)