Roblox recently changed the criteria for publish items to Roblox. The
Creator Store, the place creators can upload ‘source’ content for use, derivation or remixing by third-party creators or publishers, is not the same as
Roblox Marketplace, where items are sold direct to users. The former is ‘free’ but subject to identity verification. The latter requires at least a
Roblox Plus paid monthly subscription and similar identity verification. For more information on the former,
Creator Store, see “
New Requirements to Publish to the Creator Store“.
Accessory Fitting Tool
To upload stand-alone accessory items to Roblox they must be assembled using the Accessory Fitting Tool, else they will be flagged as ‘invalid’ and rejected.

The Accessory Fitting Tool needs to be used to assemble valid accessory items or they will fail the upload process.
Development Item vs. Avatar Item
Content uploaded to the Roblox through Studio can be used in three contexts;
• Personal: use by author/publisher only.
• Creator Store: use by third-parties (derivations/sub-licensing etc.).
• Marketplace: available for direct sale to userbase.
Important: publishing criteria… [more]
There are different submission criteria and fee structures when publishing content for other creators/parties to use via the Creator Store (Development item), vs. content made available to general users via Marketplace (Avatar item).
Roblox Studio only provides options to upload Development item‘s or Avatar item‘s, Personal item use is inherent to being the author of any published content, it’s available as inventory regardless – subject to approval, personal items do not need to be pushed through the full Creator Store or Marketplace publishing pathway to be available to the user or visible in-game.

Accessory items can be uploaded as a Development or Avatar item, each sends the accessory through a slightly different process.
Validation & Errors
After selecting or setting the Asset Category, e.g. Hat, Roblox Studio will validate the item to make sure it’s been assembled properly. If not, or any other issues are found, a warning notice is displayed. Clicking this display explanatory notes and possible actions needed to correct and fix.

If the item being submitted isn’t properly formatted, or others issues are found, validation will fail. Clicking the notification icon displays messages and potential remedial actions.
Timestamps
Times are approximate;
– n/a