On 9 August, the European Broadcasting Union (EBU) announced that Portugal would participate in the Junior Eurovision Song Contest 2017 in Tbilisi, Georgia.

The competing song, titled "Youtuber", written by João Cabrita and Mariana Andrade, was revealed on 29 September 2017.

[3] The jury members of Júniores de Portugal were:[4] The final, hosted by Jorge Gabriel and Sónia Araújo, took place on 5 October 2017 in RTP Studios in Porto.

After this, voters also had the option to watch longer one-minute clips from each participant's rehearsal.

The second phase of the online voting took place during the live show and began right after the last performance and was open for 15 minutes.