Why does Roblox cap DataStore values at 4 MB?

Roblox enforces a 4,000,000-byte UTF-8 limit per value to keep replication and storage predictable. Exceeding it triggers Error 105.

How do I measure DataStore size in Luau?

Use `string.len(HttpService:JSONEncode(data))` after serializing your value. This calculator does the same in your browser.

What's the maximum DataStore key length?

Roblox documents 50 characters but DevForum 176772 confirmed 49 is the safe effective limit.

Validateur de taille et clé DataStore Roblox

Roblox plafonne les valeurs DataStore à 4 Mo UTF-8. Évite Error 105 avant déploiement.

71 octets UTF-80.00% de la limite 4 Mo

Sûr. En dessous de 60% de la limite.

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Utilise-le dans ton jeu (roblox-ts) :

// Safe-save: refuse payloads above 4 MB (generated by roship.ai)
import { DataStoreService, HttpService } from "@rbxts/services";

const store = DataStoreService.GetDataStore("PlayerData");
const measure = (data: unknown): number =>
  HttpService.JSONEncode(data).size();

function safeSave(key: string, data: unknown): void {
  const bytes = measure(data);
  if (bytes > 4_000_000) {
    warn(`Payload ${bytes}B exceeds 4MB cap`);
    return;
  }
  store.SetAsync(key, data);
}

Crée un jeu Roblox sans coder

roship écrit le Luau, tu gardes 70% de chaque vente.

Essayer roship gratuit

Utilise-le dans ton jeu (roblox-ts) :

// Safe-save: refuse payloads above 4 MB (generated by roship.ai)
import { DataStoreService, HttpService } from "@rbxts/services";

const store = DataStoreService.GetDataStore("PlayerData");
const measure = (data: unknown): number =>
  HttpService.JSONEncode(data).size();

function safeSave(key: string, data: unknown): void {
  const bytes = measure(data);
  if (bytes > 4_000_000) {
    warn(`Payload ${bytes}B exceeds 4MB cap`);
    return;
  }
  store.SetAsync(key, data);
}