Slay the Spire Custom Card Maker

Online tool to make custom Slay the Spire cards with real-time preview. Customize frame, type, artwork, and export as PNG.

This is an unofficial fan-made tool and is not affiliated with or endorsed by Mega Crit. Slay the Spire and all related assets are trademarks and copyrights of Mega Crit, LLC.

Upload a card image (PNG/JPG/WebP).

Preview

Built for Creators

A professional card design pipeline right in your browser.

Real-time Composition

Every edit updates instantly on canvas — typography, orb value, and layered frame styling.

Authentic STS Visuals

Extracted card UI assets and matching font treatments stay close to in-game aesthetics.

Creator Workflow

Upload art, tune card text, and export quickly for mod prototypes and social posts.

How to make a custom card

  1. 1Select card type, color, and frame rarity.
  2. 2Set card name, description, and orb cost value.
  3. 3Upload artwork and adjust text until the preview looks correct.
  4. 4Sign in with Google, then download the final PNG.

Use cases

  • Create custom card concepts before implementing mods.
  • Share balance ideas with your team or Discord community.
  • Produce quick visual mockups for guide articles.

Related resources

Cards Database →·News & Updates →

FAQ

Common questions about the DIY Card Builder.