Runs 100% in your browser
Your data never leaves your device. zero uploads.
Decode TOON into JSON and review the reconstructed data in your browser.
Convert a TOON sample back into a familiar JSON structure before inspecting or passing it to another application. Resolve syntax feedback in the source first, then review arrays and nested values in the output. This page starts in the decoding direction.
Decode a small TOON record with name and role fields, then check those properties in the generated JSON object.
Decoding follows the installed TOON library's supported syntax. A successful conversion does not validate the data against your application's schema.
Choose the conversion direction and enter the source data. Review validation feedback and the converted output. Copy the result and verify it with the system that will consume it.
Decoding follows the installed TOON library's supported syntax. A successful conversion does not validate the data against your application's schema.
No registration, no tracking of your content, no server uploads. Don't just take our word for it:
Your files and text are processed entirely on your device. Nothing is ever sent to us.
Once loaded, this tool keeps working with your Wi-Fi turned off. Try it.
Open your browser's DevTools → Network tab. You'll see zero requests carrying your data.
More utilities for your next task.
Convert JSON into TOON (Token-Oriented Object Notation) with a live preview and configurable output to cut LLM prompt tokens. Free and runs in your browser.
Find added, removed, and changed values between two JSON inputs in a side-by-side diff. Free online JSON diff tool with private, browser-local processing.
Compare two JSON documents and see differences in their values and structure, with key order ignored. Free online JSON compare tool that runs in your browser.