json

JSON Formatter / Validator — Format, minify, or validate any JSON in your browser. Choose indent style and see error details for invalid input.

JWT Decoder — Paste a JWT and see the header, payload, expiry, and signature parts decoded. Everything happens in your browser.

CSV ↔ JSON — Convert tabular data between CSV and JSON. Header row detection, custom delimiter, quoted-field-with-comma support.

JSON Diff — Compare two JSON values structurally — see exactly what was added, removed, or changed, with full key paths.

YAML Formatter — Paste any YAML and format it cleanly — pick indent width and line wrap, optionally sort keys. Also validates YAML syntax and converts b...

JSON to TypeScript — Paste a JSON payload and instantly get TypeScript interfaces (or type aliases) describing its shape. Optionally mark all properties...

JSON to Go Struct — Paste a JSON sample and get matching Go struct definitions — with optional json:"..." tags, omitempty, and...

JSON to JSON Schema — Paste any JSON sample and get a JSON Schema describing its shape — useful for API documentation, request/response validation, and ...

JSON to Zod Schema — Paste JSON and get a ready-to-use z.object({...}) Zod schema plus the inferred TypeScript type.

Data Format Converter — Convert between structured data formats instantly. Parse and serialize JSON, YAML, TOML, and XML with configurable indentation a...

JSON Schema Builder — Build JSON validation models visually. Configure properties, toggle required attributes, and instantly copy JSON Schema, Zod code,...

Inspect a PDF's internal structure as formatted JSON. See objects, streams, cross-reference tables, and page trees. Developer tool, in-browser.

Free online json toolkit. No signup required.

XLSX to JSON — Convert any Excel sheet to JSON — array of objects keyed by header row, or array of arrays with no header.

JSON to CSV — Convert any JSON array (of objects or arrays) — or even a single object — into clean CSV. Tick the Flatten option to expand nested objects...

Convert TSV (tab-separated values) to JSON online. Use the first row as keys, auto-parse numbers and booleans, and copy the formatted output instantly.