Neroidea

Free browser tools and games — HEIC converter, seller fee ca

FreeProductivityListed Oct 16, 2026

About Neroidea

Neroidea is a free browser toolkit that runs entirely client-side — no account, nothing uploaded. Batch HEIC conversion (JPG/PNG/WebP/PDF) with EXIF preserved, decoded in-tab via a WASM build of libheif. Seller fee calculators for six marketplaces (Amazon FBA, Etsy, eBay, Depop, Poshmark, Mercari) kept in sync with 2026 official rates. Daily games (Promptle, Math Party, Magic Cube) and a curated gallery of 1,100+ AI artworks published with the exact prompts behind them.