partial-json

Progressive UI from LLM

O(n) streaming JSON parser for LLM tool calls. Agents act sooner, abort bad outputs early. WASM SIMD, up to 2000× faster than stock AI SDK parsers.

Parse partial JSON as it streams in. Type-safe, tiny, built for LLM output.

A utility for efficient, schema-validated parsing of JSON streams in real-time.

Streaming JSON parser for LLM outputs. Zod-typed partials, zero runtime deps. Native adapters for OpenAI, Anthropic, Ollama, and raw fetch/SSE.

Streaming JSON for Web Streams: NDJSON, incremental array streaming, and partial JSON for LLM output. Zero dependencies, runs on every runtime.

A React library for building generative UIs from streaming LLM / backend responses.

Best-effort parsing of partial/streaming JSON from LLM tool-calls — zero dependencies

Best-effort parser for incomplete JSON. Render streaming LLM output before it finishes arriving. Zero dependencies, never throws.

Transparent local reverse proxy and Web Studio for inspecting LLM SSE token streams, measuring inter-token jitter, detecting proxy buffering, and reconstructing streaming tool calls.

Extract complete JSON objects from partial, streaming or malformed LLM output — string-literal-aware, LaTeX-safe, zero-dependency TypeScript.

Resilient streaming JSON completer repairing truncated in-flight JSON tokens into valid parse trees

Turn a language model's token stream into a stream of the structured object as it fills in.

Fix what your LLM returns: JSON extraction & repair, unified streaming parser, token-aware chunking. Zero dependencies.

Incrementally parse partial / streaming JSON (LLM token streams, SSE) — best-effort object from incomplete JSON, and emit array items / OpenAI deltas as they complete. Stdlib only.

Incremental, zero-dependency partial-JSON parser for LLM streams. Get the best valid value out of JSON that's still arriving.