user66742: I know there are a lot of services to look up if I have the wallet address or transaction ID. But, let's say I have no idea who the sender or receiver were nor a transaction ID but I know approximately or exactly the amount of bitcoin which were sent, and I know the approximate time period where the transaction was sent.
Is there a web-based service which would allow me to find matching transactions easily?
Similar to this question,
Can you search a transaction by quantity?
But the transaction wasn't limited to the last few hours, the goochain site recommended there appears to no longer be a blockchain search tool, and I really would prefer an online interface.
I am amazed I can't find a service that does this online. All the main block explorers I checked don't seem to have this as an option.

user5406: Yes, you can use blockchair.com. One of their searchable data types is transaction outputs and they allow filtering both by time and amount (either BTC or USD): https://blockchair.com/bitcoin/outputs#

66742: <p>I know there are a lot of services to look up if I have the wallet address or transaction ID. But, let's say I have no idea who the sender or receiver were nor a transaction ID but I know approximately or exactly the amount of bitcoin which were sent, and I know the approximate time period where the transaction was sent.</p>
<p>Is there a web-based service which would allow me to find matching transactions easily?</p>
<p>Similar to this question,
<a href="https://bitcoin.stackexchange.com/questions/44254/can-you-search-a-transaction-by-quantity">Can you search a transaction by quantity?</a>
But the transaction wasn't limited to the last few hours, the goochain site recommended there appears to no longer be a blockchain search tool, and I really would prefer an online interface.</p>
<p>I am amazed I can't find a service that does this online. All the main block explorers I checked don't seem to have this as an option.</p>
 5406: <p>Yes, you can use blockchair.com. One of their searchable data types is transaction outputs and they allow filtering both by time and amount (either BTC or USD): <a href="https://blockchair.com/bitcoin/outputs#" rel="nofollow noreferrer">https://blockchair.com/bitcoin/outputs#</a></p>
