
ZONFORMAT
Zero overhead notation Token Reducer
2 followers
Zero overhead notation Token Reducer
2 followers
ZON is a human-readable, token-efficient data format designed for LLMs. A superior alternative to JSON, YAML, and TOON that saves 30-40% on API costs.




hey PH! 👋
i’m roni, full-stack dev from india, ex-gsoc @ internet archive.
built ZON because i was tired of json eating 40-70% of my openai bills for no reason.
ZON = zero-overhead notation → same data, 35-70% fewer tokens, zero parse overhead.
works with langchain, llama.cpp, openai sdk, streaming, zod schemas… all in <2kb.
live demo in the first link → paste any json and watch the tokens melt.
would love your brutal feedback (and a star on github if it saves you $ 😂)
https://github.com/ZON-Format
let’s make llm prompts cheap again ⚡️