A hydrocarbon conversion process, comprising: (a) providing a pyrolysis feedstock comprising ≥ 10.0 wt. % hydrocarbon based on the weight of the pyrolysis feedstock; (b) pyrolysing the pyrolysis feedstock to produce a pyrolysis effluent comprising tar and ≥ 1.0 wt. % of C 2 unsaturates, based on the weight of the pyrolysis effluent; (c) separating at least a portion of the tar from the pyrolysis effluent, wherein the separated tar contains ≥ 90 wt. % of the pyrolysis effluent's molecules having an atmospheric boiling point of ≥ 290°C; (d) providing a utility fluid, the utility fluid comprising 1-ring and/or 2-ring aromatics, in an amount ≥ 25.0 wt. % based on the weight of the utility fluid, the utility fluid having a final boiling point ≤ 430°C; (e) providing a treat gas comprising molecular hydrogen; (f) hydroprocessing at least a portion of the separated tar in the presence of (i) the treat gas and (ii) the utility fluid under catalytic hydroprocessing conditions at a utility fluid: tar weight ratio in the range of 0.05 to 4.0, to produce a hydroprocessed product; (g) separating a product overhead mixture and a product bottoms mixture from the hydroprocessed product, wherein (i) the product overhead mixture comprises at least a portion of any un-reacted treat gas and (ii) the product bottoms mixture comprising hydroprocessed tar; (h) separating from the product bottoms mixture (i) a product vapor stream, (ii) a product liquid stream, and (iii) a side stream, the side stream having a final boiling point ≤ 430°C and comprising 1-ring and/or 2-ring aromatics, in an amount ≥ 25.0 wt. % based on the weight of the side stream; (i) cooling the product overhead mixture; (j) separating a fluid from the cooled product overhead mixture, the fluid having a final atmospheric boiling point ≤ 350°C and comprising 1- ring and/or 2-ring aromatics in an amount ≥ 50.0 wt. %, based on the weight of the fluid; and (k) conducting a portion of the side stream and at least a portion of the separated fluid to step (d), wherein the utility fluid comprises ≥ 10.0 wt. % of the side stream and ≥ 20.0 wt. % of the separated fluid, based on the weight of the utility fluid. (a) providing a pyrolysis feedstock comprising ≥ 10.0 wt. % hydrocarbon based on the weight of the pyrolysis feedstock; (b) pyrolysing the pyrolysis feedstock to produce a pyrolysis effluent comprising tar and ≥ 1.0 wt. % of C 2 unsaturates, based on the weight of the pyrolysis effluent; (c) separating at least a portion of the tar from the pyrolysis effluent, wherein the separated tar contains ≥ 90 wt. % of the pyrolysis effluent's molecules having an atmospheric boiling point of ≥ 290°C; (d) providing a utility fluid, the utility fluid comprising 1-ring and/or 2-ring aromatics, in an amount ≥ 25.0 wt. % based on the weight of the utility fluid, the utility fluid having a final boiling point ≤ 430°C; (e) providing a treat gas comprising molecular hydrogen; (f) hydroprocessing at least a portion of the separated tar in the presence of (i) the treat gas and (ii) the utility fluid under catalytic hydroprocessing conditions at a utility fluid: tar weight ratio in the range of 0.05 to 4.0, to produce a hydroprocessed product; (g) separating a product overhead mixture and a product bottoms mixture from the hydroprocessed product, wherein (i) the product overhead mixture comprises at least a portion of any un-reacted treat gas and (ii) the product bottoms mixture comprising hydroprocessed tar; (h) separating from the product bottoms mixture (i) a product vapor stream, (ii) a product liquid stream, and (iii) a side stream, the side stream having a final boiling point ≤ 430°C and comprising 1-ring and/or 2-ring aromatics, in an amount ≥ 25.0 wt. % based on the weight of the side stream; (i) cooling the product overhead mixture; (j) separating a fluid from the cooled product overhead mixture, the fluid having a final atmospheric boiling point ≤ 350°C and comprising 1- ring and/or 2-ring aromatics in an amount ≥ 50.0 wt. %, based on the weight of the fluid; and (k) conducting a portion of the side stream and at least a portion of the separated fluid to step (d), wherein the utility fluid comprises ≥ 10.0 wt. % of the side stream and ≥ 20.0 wt. % of the separated fluid, based on the weight of the utility fluid.