Looking for on-chain wallets that work with Testnet4

I'm aware that Sparrow 2.0 supports it. Are there any other on-chain wallets compatible with Testnet4? I'm working on an educational project for newbies, and it would be great to create a key on one machine and then be able to restore it on another.

Electrum is what you're looking for.

Yeah electrum supports it’s so as wizz wallet (although not too familiar with it), here is a link to get some few testnet4 resources. https://t4-wallet.anyone.eu.org/. You can simply generate the keys on the sparrow wallet and import it into any of them. There is also this UniSat wallet that I think would support it

Unless you have specific requirement, Electrum (version 4.5.6 or newer) is decent choice. It's very light application with wide OS support. But regarding generate/restore, take note Electrum doesn't support generate BIP 39 words or individual private key when creating a wallet. There are other options such as Bitcoin Core and UniSat, but i doubt it's suitable for educational project.

OP can use any tool like Iancoleman or BitAddress for generating the keys or the BIP39 phrases. It's not that difficult at all, and for an educational project it's not worth the hassle involved in using other, potentially heavier wallet software. But here is a list of other software that does support testnet4: https://testnet4.com/

Thanks for this. Actually in my mind the whole feature of being able to import the same seed phrase in the other app (like Electrum) is pretty critical, to me that's the magic, is that it doesn't need to be associated with the original software. So Electrum, because it doesn't use BIP39, doesn't work.

That's what I use Ian Coleman for (on a system that will never be online again). For my own peace of mind, I sometimes try if I can reproduce the addresses and their private keys from a seed phrase. Until now, that always worked

Ahh! That looks really interesting, thanks for mentioning it! So it looks like https://iancoleman.io/bip39/ supports Testnet bitcoin, but not Testnet4. Do you think there might there be a way for me to save this off, and (without needing a ton of skill) adding a Testnet4 option to it, so I can match what Sparrow 2.0 does, in terms of showing the public key, the addresses, etc?

I don't think the address format changed, so it should just work.

Just to be clear, Electtrum actually let you import BIP 39 words. It just doesn't offer option to generate BIP 39 words when you create new wallet.

FYI - it looks like Nunchuck (https://nunchuk.io/) works well, and supports Testnet4 though they just call it Testnet.

Good find. Although it's weird i verified this information from one of GitHub issue[1], rather than their website or note on release/download page. [1] https://github.com/nunchuk-io/nunchuk-android/issues/72

I guess they just need to update their website with the info and we're good.