Explorers are web tools for reading blockchain data. They let you look up accounts, transactions, blocks, and smart contracts, making it easy to verify activity and debug issues.
A blockchain explorer is a website that indexes on‑chain data and presents it in a searchable user interface (UI). In TON, explorers commonly show account balances, recent transactions, jettons and non‑fungible tokens (NFTs), contract code and state, and links to related blocks and messages.
Indexers continuously read blocks from nodes, parse messages and transactions, and store them in a database optimized for queries. Explorers rely on these indexers to provide fast search, traces, higher‑level events, and historical views beyond what a single node exposes by default.