Electrical outlets in Paris

It depends what devices you're talking about, and what chargers you have. If you're talking phones and laptops the chargers you have should be dual voltage, in which case you just need a plug adaptor - which you can buy cheaply online at home before you leave.

If you're in the US it's not worth bringing anything that doesn't cope with 230/240 volts. The transformer will be too heavy.

Any big supermarket/hypermarket and most small supermarkets will have cheap phone chargers

Yes mainly our phones/laptops. I see that you need an adaptor but there are so many.....

You don't need to spend a lot of money on universal converters etc. Small appliances, such as the ones you described are all manufactured as dual voltage these days. I use these with phone chargers and a white noise machine.

https://www.amazon.com/Unidapt-European-Adapter-Converter-adaptor/dp/B077WJYNQ5?source=ps-sl-shoppingads-lpcontext&ref_=fplfs&psc=1&smid=A1WXU4RN50KIL9

I have a bunch of simple c-type plug adapters (ie two US flat prongs go in and come out as two round Euro style). Since ALL of the electronics I bring use the now common 100V to 240V range, so good for the US and Europe. That covers cell phones, laptops, iPads, Kindles, Garmins, GoPros, etc.. MANY - but not ALL - laptops are now using the two prong plugs (not the three prong), so confirm that's the same for you (if bringing a laptop).

And an adapter is a BAD idea with things like HAIR DRYERS or curling irons or similar without verifying that those devices are not meant only for the US market. BAD things happen when a US-only hair dryer is used in Europe. Most hotels (and hopefully an airbnb) will have hair dryers available to avoid the what happens when a guest brings their own.

I also have a multi-adapter travel cube that basically has a bunch of input and output options and a few USB options. It is pretty simple, but bulky vs the little c-types.

You can go two routes, or both.

The cheap adapters like what HappyToBeHere linked are all you need for phones, tablets, computers, and other electronics.

Sometimes with multiple people and multiple devices, and the limited number of outlets in some hotel rooms, you might go with a multi-port USB charger, something like this: https://www.amazon.com/dp/B0BDLLJBDQ?tag=track-ect-usa-1683799-20&linkCode=osi&th=1

I travel enough, that I have a USB charger with the European Type C plug, like this: https://www.amazon.com/European-Travel-Adapter-Charger-Android/dp/B0D5MMF5J2/ref=asc_df_B0D5MMF5J2?mcid=08bf25e02e843b318b7e9329d80a97ad&hvocijid=4630898283815029444-B0D5MMF5J2-&hvexpln=73&tag=hyprod-20&linkCode=df0&hvadid=721245378154&hvpos=&hvnetw=g&hvrand=4630898283815029444&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9018570&hvtargid=pla-2281435180698&th=1

As others said, leave anything that does not accept 240V at home (Hair dryers, curling irons, etc.)

I have scattered the things all over europe so always take a handfull.
You just need a plug adapter; you should not take electornics th tneed a transformer; they are a ifre hazard. Most hotels and apartments have hair dryers. If you need a curling iron, get one there.

This is what you need: https://www.amazon.com/dp/B097GCZWMM?ref=ppx_pop_dt_b_asin_title&th=1

I always carried the simple two-prong adapters like previously posted. But on a very recent trip to Vienna, their outlets wouldn't allow these (I know, not France, but supposedly these countries have the same technical requirements). There was some sort of cam that required that the ground contact be depressed using a full-size adapter before you could plug your adapter in fully. IDK if I am explaining that correctly, but basically you needed a full, grounded adapter to plug in (think of those foolish "child-proof" outlets they now sell in the States). First time I had seen this and fortunately the front desk had an adapter that worked. It is a little silly because none of my chargers have or require a ground terminal, but I am wondering if these will become more widespread in Europe to keep people from plugging in grounded appliances without the ground connected..

I've always just traveled with the 2-prong adapter others have linked to BUT last Fall on my trip to France I had this one that has USB ports and plugs. I travel solo but I have an iPhone, Apple Watch, iPad mini and AirPods.

https://tinyurl.com/4wpbn33j

Mardee recently traveled with this one with an extension cord and was pleased with it so I may get this for my next trip. It always seems like plugs are under beds or behind desks, or something!

https://tinyurl.com/4src2w3d

We always come to Europe with a converter from 220 to 110 volts. We got it on Amazon and it is neither expensive nor heavy (probably less than 2 pounds). It has worked well with devices that need 110 volts. Peter

@Peter...just curious....what kind of devices do you have that you need a converter for? None of the electronic devices would need a converter as the new ones are all dual.

I once took out the power in an entire wing of an Italian hotel with my converter; that was embarrassing. Our appliances are all dual voltage and we haven't rented an apartment or been in a hotel in years that doesn't provide hair dryers and irons if needed.

My wife has a special pump for her arm as she suffers from lymphedema. We have not wanted to risk ruining it (it is expensive) by subjecting it to 220 current. Also I put my hearing aid charger on 110 so as not to risk ruining it. Peter

@adodd, I'm sorry for your wife's condition. Many medical devices are dual voltage but it should say on the plug or your user information if this is the case. I can understand not wanting to risk an expensive piece of equipment as well.