For illustration, use Procreate (iPad, $13 one-time) or Photoshop ($23/mo). For pixel art, use Aseprite ($20 one-time) — it's the industry standard. For generative/abstract art, try Processing or p5.js (both free). Your style matters more than your tool — pixel art, hand-drawn, 3D renders, and abstract all work for NFTs.

For a PFP collection, start with one base character. Then design traits as separate layers: backgrounds, headwear, eyes, clothing, accessories. Each trait needs to be on its own layer with consistent canvas size (typically 3000x3000px). Plan 8-12 trait categories with 5-15 variations each — this creates enough unique combinations for a 5K-10K collection.

HashLips Art Engine is a free, open-source tool that takes your layered trait files and generates thousands of unique combinations with proper rarity weighting. Set rarity percentages for each trait, run the script, and it outputs numbered PNGs + JSON metadata files ready for minting. It's what most successful collections use.

NFT metadata (name, description, traits, image URL) needs to be stored permanently. Upload your images and JSON metadata to IPFS using Pinata (free tier: 500MB) or NFT.Storage (free, backed by Filecoin). Your metadata follows the OpenSea metadata standard so marketplaces display traits correctly.

For simple drops, OpenSea's lazy minting is free — you list NFTs and buyers pay the gas on purchase. For a proper collection launch, use Thirdweb or Manifold to deploy a smart contract without writing code. Thirdweb has a free tier and handles the contract deployment, minting page, and allowlists.