user31663: Can i access the testnet without downloading the blockchain? im developing a software to do a testnet (later it will be in mainnet) transaction with a custom message embedded into OP_RETURN. if the users have to download the whole blockchain, the users im targeting for this software, will not be interested of using this. 

user34941: If you are developing in java using the bitcoinj library, they have a mechanism in place to do it without downloading the full block chain. They just download the header lightweight simplified payment verification (SPV) mode. Maybe you can try that.This is the link

31663: <p>Can i access the testnet without downloading the blockchain? im developing a software to do a testnet (later it will be in mainnet) transaction with a custom message embedded into OP_RETURN. if the users have to download the whole blockchain, the users im targeting for this software, will not be interested of using this. </p>
 34941: <p>If you are developing in java using the <code>bitcoinj</code> library, they have a mechanism in place to do it without downloading the full block chain. They just download the header <code>lightweight simplified payment verification (SPV) mode</code>. Maybe you can try that.This is the <a href="https://bitcoinj.github.io/" rel="nofollow">link</a></p>
