Onlyfire Grill Top Pizza Oven Kit for Gas Grill, Charcoal Grill and Propane, Portable Stainless Steel Pizza Maker with Pizza Stone and Pizza Peel Kit Review (2026)
Updated September 21, 2026 · Research-based review
Our verdict
A stainless steel pizza oven box that sits on top of an existing gas, charcoal or propane grill instead of requiring a dedicated pizza oven purchase. It ships with a cordierite stone, a peel and a thermometer, and works across multiple fuel types. Reaching consistent high heat depends on the grill underneath, so results vary by setup.
Onlyfire's portable stainless steel grill top pizza oven kit for gas, charcoal and propane grills, with stone and peel.
Price range: See on Amazon
What we liked
- + Works on gas, charcoal and propane grills, so it fits most setups
- + Stainless steel body resists rust when left outdoors near the grill
- + Stone and peel included for a ready-to-bake grill pizza kit
Trade-offs
- - Grill heat varies, so reaching high stone temperature takes patience
- - Box needs enough grill width and lid clearance to sit properly
What it is
This is a grill-top pizza oven attachment rather than a standalone oven, meaning it sits directly on the grates of an existing gas, charcoal or propane grill and uses the grill's own heat to bake pizza inside an enclosed stainless steel chamber. Onlyfire markets this style of kit, sold under model numbers for different grill types, as a way to convert a grill someone already owns into a high-heat baking station rather than buying a separate wood-fired or gas pizza oven. The kit includes a round cordierite pizza stone, a pizza peel for sliding pizzas in and out, and a thermometer to monitor the temperature inside the chamber during cooking.
Design and construction
The chamber is built from stainless steel, which resists rust better than painted steel when the kit is stored outdoors near a grill or exposed to weather between uses. According to the manufacturer, the enclosed design is meant to trap and circulate heat so the inside of the chamber can approach the high temperatures associated with dedicated pizza ovens, rather than relying only on direct grill heat hitting the bottom of the stone. A flip-open lid on top lets you check on the pizza or rotate it partway through cooking without lifting the entire box off the grill, which helps avoid losing heat compared to designs that require full removal to check progress.
Fit and compatibility
Because this kit sits on top of grill grates rather than being a self-contained unit, the manufacturer specifically advises measuring the cook box of your grill before ordering, since the base needs to sit securely and the grill's lid, where applicable, needs enough clearance to close or vent properly around the box. It is designed to work across gas grills, charcoal grills and propane setups, which is a genuine advantage for anyone who already owns a grill and does not want a second dedicated appliance taking up patio space. The trade-off of that flexibility is that fit and performance depend on the specific grill it is paired with.
Baking performance
The stone and enclosed chamber are designed to produce a crisp crust similar to a dedicated pizza oven, but because the heat source is a home grill rather than a purpose-built oven, reaching and holding the high, even temperatures needed for a fast bake takes more patience and attention than with a gas or wood pizza oven built for that single job. Grill heat output varies by fuel type, grill size and how well the lid seals around the kit, so two different grills paired with the same kit can produce different results. Preheating the stone thoroughly before adding the pizza, and monitoring the included thermometer, helps get more consistent bakes.
Who should buy it
This kit suits grill owners who want to try pizza oven style baking without buying a separate dedicated oven, especially anyone who already grills regularly on gas, charcoal or propane and has enough clearance on their grill's cook box for the unit to sit properly. It is a lower-cost entry point into grill pizza compared to a standalone wood-fired oven, and the stainless build and included accessories make it a reasonably complete starter kit. Anyone who wants fast, consistently high heat without fiddling with grill temperature should budget more for a dedicated pizza oven instead.
Frequently asked questions
Does this work on a charcoal grill or only gas?
It is designed to work across gas grills, charcoal grills and propane setups, though the manufacturer recommends measuring your grill's cook box before ordering to confirm it fits.
What is included in the kit?
It comes with a cordierite pizza stone, a pizza peel and a thermometer to monitor chamber temperature, along with the stainless steel oven box itself.
How hot does it get inside the chamber?
The enclosed stainless steel design is meant to trap and circulate grill heat toward pizza-oven-like temperatures, but actual heat depends on the grill underneath, so results vary by setup.
Can you check the pizza without removing the whole unit?
Yes, a flip-open lid lets you check progress or rotate the pizza without lifting the box off the grill, which helps avoid losing built-up heat.
Prices change often, so check the current price and availability on Amazon.
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