This step is where you upload the actual files for your NFT collection — both the images (artworks) and the metadata (info that tells wallets and marketplaces what each NFT is).
Choose where your files will be stored:
IPFS (cheaper, decentralized):
Files are stored off-chain, but you or the platform must keep them pinned (online).
Irys (permanent, more expensive):
Files are stored directly on the blockchain and don’t require ongoing hosting.
Pick based on your budget and whether permanent on-chain storage matters for your project.
Drag & drop or click to upload your artwork and metadata files.
Max file size: 100MB per file
Filenames must be numbers only — no extra characters.
👉 Example: 1.png, 2.png, 3.png
Metadata files must match artwork numbers exactly.
👉 Example: 1.json for 1.png, 2.json for 2.png, etc.
This is critical — mismatched filenames will break your collection.
Here you'll see a list of uploaded image files (once added).