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JSON Parser

Parse JSON and inspect keys, arrays, depth and node count

How to Use JSON Parser

  1. Open JSON Parser above — it loads instantly, no signup or download required.
  2. Provide your input (paste text, drop a file, or type directly into the tool).
  3. Get your result instantly — everything is processed locally in your browser and nothing is uploaded.
  4. Copy or download the output. Refresh the page to clear all data from memory.

About JSON Parser

What this page solves

Parsing JSON in a CLI means writing a `jq` command; in code means running a snippet. JSON Parser gives you the same parse-and-inspect loop in your browser, with structural stats (keys, arrays, depth, node count) and exact error-line pointing on malformed input.

JSON Parser runs the native `JSON.parse` engine in your browser and surfaces the result as both a clean indented document and a set of structural stats — total keys, array count, maximum nesting depth, and total node count — so you can spot whether an API response is unexpectedly deep, accidentally array-of-arrays, or missing a field at a glance. Paste JSON, upload a file up to 5 MB, or fetch a public URL, and the parser either validates and shows the stats, or pinpoints the exact line and column of the first parse error — the same information `node -e "JSON.parse(...)"` would give you, without leaving the browser. It is the right tool when you need to know whether a payload is valid before piping it into another system, when you want to compare the shape of two API responses (do both have 4 keys at depth 3?), or when a Webhook is failing in production and you need to triage the body without firing up an IDE. Combine it with the JSON Schema Validator to check structural conformance against a contract, the JSONPath Tester to pull specific values, or the JSON Diff tool to compare two parsed payloads side by side. Runs entirely in your browser — no upload, no signup, no logs.

Common Use Cases

  • Validate a JSON payload before sending it to a strict API endpoint
  • Count keys, arrays, and depth in an unfamiliar API response to gauge complexity
  • Pinpoint the exact line and column of a malformed JSON file without opening an editor
  • Compare structural stats of two API responses to detect a backend schema change
  • Quickly check whether a config file (`tsconfig`, `package.json`) parses before committing
  • Inspect a webhook body during incident triage without launching a terminal

Related tools in Developer Tools

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Frequently asked questions

How to use JSON Parser?

1) Open the tool. 2) Enter or upload your input. 3) Get your result instantly. Everything happens locally — nothing is uploaded.

When should I use JSON Parser?

Use it to quickly validate a JSON payload, count its keys and depth, or pinpoint exactly where a malformed file is breaking — without launching a terminal or Node.

Is JSON Parser safe?

Yes. JSON Parser runs 100% in your browser. Inputs are never uploaded, stored, or logged — safe for confidential content.

Will quality be affected by JSON Parser?

JSON Parser performs lossless operations — your content is not re-encoded or downgraded.

What formats does JSON Parser support?

JSON Parser supports JSON, YAML, XML, CSV, TOML and other developer-friendly text formats

Is JSON Parser free?

Yes — JSON Parser is completely free, with no registration, no watermarks, and no usage limits.

What does the "depth" stat actually measure?

The maximum nesting level from the root. `{"a": 1}` is depth 2 (object → value). `{"a": {"b": {"c": 1}}}` is depth 4. High depth often signals a payload that will be slow to render in a tree view or hard to query — flatten with `jq` or refactor the API.

How is this different from JSON Formatter?

Same parser engine. JSON Parser foregrounds the validation result and structural stats so you can answer "is this valid? how complex is it?" in one glance. JSON Formatter foregrounds the pretty-printed output for copying back into code or a ticket.

Why am I getting "Unexpected end of JSON input"?

The parser hit EOF mid-document — usually because a closing `}` or `]` is missing, or a streaming response was truncated mid-flight. Scroll to the bottom of the input, count opening vs closing brackets, and add the missing one.

Can it parse JSON with BigInt or non-standard numbers?

Standard `JSON.parse` returns all numbers as IEEE-754 doubles, so values above `Number.MAX_SAFE_INTEGER` (2^53 − 1) lose precision. The parser will accept them but the value shown may differ from the source by a few digits. For accurate handling of 64-bit IDs, treat them as strings in the source JSON.