Cuphead

Studio MDHR Entertainment Inc.·Studio MDHR Entertainment Inc.·2017

Partial

21:9

Fix Required

32:9

Fix Required

Gameplay Scaling

Fixed FOV crop

HUD

Centered

Centered HUD

Unavailable

Cutscenes

16:9 pillarboxed

Menus

16:9

FOV

Narrow

Black Bars

Full-time

Flawless Widescreen

Not Supported

Community Fix

Available

Online Safety

Safe

Overview

Cuphead does not support ultrawide on its own. A hex edit of Assembly-CSharp.dll (replacing the 16:9 constant with a 21:9 or 32:9 value) fills an ultrawide screen, but artwork still renders at 16:9, so black bars remain on boss stages and the tutorial. HUD, cutscene and menu behavior with the edit could not be confirmed, and the edit must be reapplied after game updates.

Compatibility details

21:9 SupportFix Required

32:9 SupportFix Required

Gameplay ScalingFixed FOV crop

HUD BehaviorCentered

Centered HUDUnavailable

Cutscene Support16:9 pillarboxed

Menu Support16:9

FOVNarrow

Black BarsFull-time

StretchingNone observed

Fixes

Recommended fix

Assembly-CSharp.dll hex edit (aspect ratio constant)

Config Edit

Version n/a (manual hex edit)Compatible with Reported for Steam and GOG builds; not re-tested on latest buildSource: PCGamingWiki / WSGF forum

View Fix Installation Instructions

UltraWideCheck links to third-party mods and tools but does not host or distribute mod files.

Patch history & verification

CurrentSep 20, 2026

Read PCGamingWiki Video section and WSGF thread: hex edit confirmed for 21:9 and 32:9, black bars on boss stages/tutorial noted. Could not confirm cutscene/HUD behavior or that the edit works on the newest build; no Flawless Widescreen module exists.