Bencode API

Encode and decode Bencode (BEP 3) — the serialization format BitTorrent uses for .torrent metainfo files and tracker responses. The encode endpoint turns a JSON value into Bencode: objects become dictionaries with their keys sorted in raw byte order exactly as the spec demands, arrays become lists, whole numbers become integers, and strings become length-prefixed byte strings. The decode endpoint parses Bencode back into a JSON value and enforces the spec strictly — no leading zeros in integers, no negative zero, dictionary keys must be sorted and unique, and no trailing data is tolerated — so malformed input is rejected rather than silently mangled. Binary byte strings that are not valid UTF-8 are represented losslessly as a {"_bytes_hex":"…"} object, so encode and decode round-trip exactly even for the binary "pieces" field of a real torrent. Decode accepts the data either as text or, for genuinely binary payloads, as hex; encode returns both the Bencode text (when printable) and its hex bytes. Everything is computed locally and deterministically, so it is instant and private. Ideal for building and parsing .torrent files, tracker tooling, BitTorrent clients and DHT messages, and teaching how the format works. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is BitTorrent's Bencode specifically; for base64, hex, URL or HTML encoding use a general encoding API, and for JSON, YAML, TOML or XML use those format APIs.