TL-B playground

Paste a TL-B schema (or pick TEP-74, TEP-62, TEP-64, W5 or the full block.tlb) and a BOC to see it decoded as JSON, then edit the JSON and serialize it back to a cell. Runs entirely in your browser.

Runs locally in your browserFor developers

Nothing you type here is sent anywhere. You can disconnect from the internet and it still works.

Related tools

TL-B to TypeScript generatorTurn a TL-B schema into typed TypeScript load/store functions for @ton/core. Local only TL-B opcode (crc32) calculatorCompute the crc32 op code of a TL-B constructor and check explicit #tags. Local only BOC converterConvert a bag of cells between base64, base64url, hex and .boc files, and inspect its header. Local only Cell tree viewerExplore a BOC as a tree: every cell's bits, refs, type, level, depth and hashes. Local only Cell layout calculatorCount the bits and refs of a cell layout, check the 1023-bit / 4-ref limits and estimate fees. Local only Dictionary (HashmapE) encoder and decoderDecode a TON dictionary cell to JSON, or build one from JSON. Jetton metadata, airdrops, configs. Local only Merkle proof builder and verifierVerify a TON Merkle proof against a root hash, see what it proves, or build proofs for dict keys. Local only Message hash toolMessage hash, normalized external hash (TEP-467) and body hash of a BOC, then find its transaction