Free online nested JSON parser, formatter and JSON toolbox
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Overview
What is NextJSON?
Decode nested JSON, format, diff and convert in your browser.
NextJSON is a free, browser-based toolbox for working with JSON. Its nested JSON parser recursively decodes multi-level, stringified and escaped JSON (for example JSON inside log lines or API payloads) and shows it as a readable, collapsible tree. You can open JSON files directly or drag and drop them in.
Other tools cover everyday JSON work: format and beautify or minify JSON, compare and diff two JSON documents, generate a JSON Schema from sample data or sample JSON from a schema, and convert JSON to TOON and back with a token-count comparison for LLM prompts. Everything runs in your browser and no sign-up is needed.
Platforms and languages
NextJSON Availability
Platforms
Languages
Capabilities
NextJSON Key Features
Nested JSON parser
Recursively decode multi-level, stringified and escaped JSON (e.g. JSON inside log lines or API payloads) into a readable, collapsible tree.
Plans and access
NextJSON Pricing
Free
NextJSON Alternatives
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