ToolsPlanet

JSON Tools

A complete browser-based toolkit for working with JSON — format, validate, convert, and compare.

Whether you're debugging a malformed API response, exporting a config file to CSV for a stakeholder, or generating TypeScript interfaces from a sample payload, the right JSON utility saves minutes per task and hours per week. Every tool below runs entirely in your browser — no uploads, no account, no quota.

Start with the JSON Formatter & Validator to spot syntax errors and pretty-print minified blobs. Use the JSON to CSV converter for spreadsheet-friendly exports, the JSON Diff tool to compare two payloads (with optional key-order ignoring), and the JSON to TypeScript generator to scaffold types from a real response. Built for engineers, analysts, and anyone who routinely works with structured data.

JSON Formatter & Validator

Beautify, minify, and validate JSON with instant error reporting and custom indentation.

JSON to CSV Converter

Convert nested JSON to a flat CSV with header preservation and dot-notation paths.

JSON Diff & Compare

Compare two JSON files side-by-side with optional key-order ignoring and structural diff.

JSON to YAML

Convert JSON to clean, quote-free YAML — and back to JSON — for configs and CI files.

JSON to TypeScript

Generate accurate TypeScript interfaces directly from a sample JSON payload.

Validate & Format Faster

Paste any JSON — pretty or minified — and our JSON Formatter reports line and column for every syntax error. Common offenders like trailing commas, unquoted keys, and stray BOM characters get caught instantly so you stop scanning files by eye.

Convert Without Uploads

Move data between formats in one click — JSON ↔ CSV, JSON ↔ YAML, and JSON → TypeScript. Every conversion runs locally, so even payloads with personal data or secrets stay on your device.

Why These JSON Tools

Browser-Only Processing Your JSON never leaves the tab. No upload, no logging, no quota — even for 10 MB payloads.
Spec-Compliant Built on the native JSON.parse engine — 100% RFC 8259 compatible, identical to your runtime parser.
Handles Nested Structures Deep objects, arrays of arrays, mixed types — converters use dot-notation flattening so nothing gets lost.
One-Click Copy & Download Every tool exports the result to clipboard or as a file — ready for your editor, spreadsheet, or repo.

Working with sensitive payloads?

API responses often contain user IDs, emails, or session tokens. These tools never transmit your data — close the tab and it's gone. Read our guide on common JSON syntax errors for fast debugging tips.