mxstbr / convertr

Chrome extension which converts units on webpages to ones you actually understand.

Convertr

When you open a webpage, Convertr scans the page and converts all the units to your measuring system of choice automatically. For example, let's say you are from mainland Europe and used to the metric system.

You might come across a recipe that uses fluid ounces and pounds online, but instead of searching Google for the conversion of all these units, Convertr takes care of them for you. Without even noticing it, all the units on the page are in millilitres and grams.

It works the other way around as well; if you are from the US and used to the imperial system, it will convert all the metric units to imperial ones.

Development instructions

1. run npm install

2. run grunt --reload-extension

3. open chrome://extensions/ and load the build as unpacked extension

Installation instructions

These instructions assume you have Google Chrome installed and are using it right now. If not, please head to the Google Chrome page and follow the instructions there.

1. Go to the Releases of the GitHub repo (click here).

2. Download the Source.crx file of the latest release.

3. Open chrome://extensions. (Click here in Chrome to open it)

4. Drag and drop the Source.crx file onto the Extensions page you opened in the last step.

5. Click Add on the popup.

And that's it! You have successfully added the extension - try it out on the test page!

convertr's Issues

Visually indicate changed numbers

When mistakes happen, users recognise them.

False flags and some unexpected behaviour with "F"

The converter detects (number)F as degrees Fahrenheit, which is expected.
But somehow the string (some character)(number)F does something weird.

I came across this by looking up a special phone: "Galaxy S5 G900F" apparently becomes "Galaxy S 900.00 °F 900.00 °F ".

Test link to release

click here

RegExp problems

Regexes match "noch 6 Stück remaining" -> implement check that after number is white space char.

Regexes match "1st of April"

No small units with high numbers

Example: Instead of showing 36000 feet as 1097280 cm, show it as 11 km.

Currencies

Convert all unknown currencies to the know currency using some sort of API for the data.

Dates

"May 1st" as a date is converted to "May 6.3kg", which doesn't make much sense.