How to use D4 Filter Forge

Diablo 4 generates a constant stream of loot — hundreds of items per hour at endgame. A loot filter is a set of rules that tells the game what to do with each item as it drops:

• ◆Show the item normally (default)
• ◆Highlight it with a coloured beam of light so it stands out on the ground
• ◆Hide it entirely so it never clutters your screen

Since patch 2.1, loot filters are a native game feature — no mods, no overlays, no third-party launchers. Blizzard stores the filter as a Base64-encoded string that you can copy and paste between the game and external tools like D4 Filter Forge.

D4 Filter Forge is a visual editor for that format. You build your rules in the browser, click Copy import code, and paste the result into the game. Nothing is installed on your PC; there is no background process.

Click Open editor on the homepage or in the navigation above. The editor opens with an empty filter ready for your first rule.

If you already have a filter in Diablo 4, you can load it into the editor:

1. 1.In Diablo 4, open Settings → Gameplay → Item Filter.
2. 2.Click the "Export" button next to your active filter. The game copies a Base64 string to your clipboard.
3. 3.Back in D4 Filter Forge, paste that string into the import field at the top of the editor and press Enter.
4. 4.All your existing rules load immediately — you can continue editing from where the game left off.

Each entry in your filter is a rule. A rule consists of two parts:

• ◆Conditions — what the item must match (rarity, slot, item power range, specific affixes, etc.)
• ◆Action — what happens to items that match (show, highlight with a specific colour, or hide)

To add a rule, click the + Add rule button in the editor. A new rule appears at the bottom of the list. Click it to expand the condition and action editors.

You can add as many conditions as you like to a single rule. An item must satisfy all conditions in a rule for the action to apply (logical AND). If you want OR logic — for example, "Rare OR Legendary" — create two separate rules with the same action.

The following condition types are available. You can combine any number of them in a single rule:

Leave a condition empty (no selection) to match all items of that type. For example, a rule with only a Rarity condition set to "Unique" will match every Unique regardless of slot or item power.

Each rule ends in one of three actions:

Rules are evaluated top to bottom. The first rule whose conditions all match wins, and its action is applied. Rules below it are skipped for that item.

This means order matters. Put your most specific rules first and your broad catch-all rules last. A classic pattern:

1. 1.Rule 1 — Mythic Unique → Highlight (gold beam). Catches every Mythic before anything else.
2. 2.Rule 2 — Unique → Highlight (orange beam). Catches every other Unique.
3. 3.Rule 3 — Legendary, item power ≥ 800 → Show. Keep high-power Legendaries visible.
4. 4.Rule 4 — Legendary → Hide. Hides low-power Legendaries that made it past rule 3.
5. 5.Rule 5 — Rare, item power ≥ 750 → Show. Keep upgrade candidates.
6. 6.Rule 6 — (catch-all, no conditions) → Hide. Hides everything not matched above.

Drag the handle on the left of each rule card to reorder rules. The live preview (see next section) immediately shows you which rule wins for your test item as you drag.

The right-hand panel in the editor is the live preview. Configure a hypothetical item by selecting its slot, rarity, item power, and any affixes. The editor evaluates every rule against that item in real time and highlights the first matching rule in the list on the left.

Use this to sanity-check your filter before pasting it into the game:

• ◆Set the test item to a Legendary with item power 780 — does the right rule fire?
• ◆Set it to a Common — does it get hidden by your catch-all rule?
• ◆Set it to a Unique — does it get highlighted immediately?

If no rule matches the test item, the game defaults to showing the item normally. The preview panel will indicate "no rule matched" in that case.

When your filter is ready, click Copy import code in the editor. This encodes your entire rule set as a Base64 string and copies it to your clipboard.

To import it into Diablo 4:

1. 1.Launch Diablo 4 and log in to any character.
2. 2.Open the main menu → Settings → Gameplay.
3. 3.Scroll down to the Item Filter section.
4. 4.Click "Import". A text input appears.
5. 5.Paste the Base64 string and confirm. Your filter is active immediately.

The import screen also has an Export button. Use this to copy your current in-game filter back into D4 Filter Forge for further editing at any time.

There are two ways to share a filter:

These patterns work well for most endgame builds in Diablo 4. Adjust item power thresholds to match your current gear level.