TOON is a compact, human-readable alternative to JSON designed for LLM and AI workloads.
It keeps the same data structures as JSON but removes most quotes, commas and braces,
which can reduce token usage in prompts and responses.
Why use this TOON parser?
Convert JSON → TOON and TOON → JSON instantly in your browser.
Great for LLM prompts, agent tools, analytics data and logs.
No signup, no server-side storage – everything runs locally in your browser.
How to use the converter
Paste or upload your JSON on the left panel.
Click JSON → TOON to generate TOON output.
Compare the size difference using the “Size” indicators above each panel.
Optionally paste TOON on the right and click TOON → JSON to convert back.