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.

Free online JSON to TOML converter with bidirectional support. Convert JSON to TOML and TOML back to JSON. Pretty-print output. No upload — runs in your browser.

Free online JSON to XML converter with bidirectional support. Convert JSON to XML and XML back to JSON. Configurable root element and pretty-print. No upload needed.

Free online data converter hub supporting JSON, YAML, TOML, XML, CSV, and INI. Bidirectional conversion with format auto-detection, swap, and syntax validation.

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.

Free online API response formatter. Beautify and format JSON, XML, and HTML API responses with syntax highlighting. Copy formatted output instantly.

Free online API mock generator. Generate realistic mock API responses from JSON Schema or sample data. Perfect for frontend development and testing.

Free online table-to-text converter. Paste AI-generated tables with Unicode box-drawing characters and convert to Markdown, CSV, JSON, bullet lists, numbered lists, or plain text. No upload — runs in your browser.