Every JSONForge Tool, Explained
JSONForge ships a focused set of JSON tools that run entirely in your browser. This guide walks through each one so you know exactly which tool to grab for a given job — and why nothing you paste ever leaves your device.
Format & validate
JSON Formatter pretty-prints, minifies, and validates JSON in one place — the first stop for any messy blob. JSON Minifier compresses to the smallest valid output and shows the byte savings. JSON Validator checks data against a JSON Schema (Draft 7) and pinpoints every violation, or generates a schema from your data as a starting point. JSON Repair fixes broken JSON — missing quotes, trailing commas — using a fast local pass first, with an AI fallback for mangled input.
View & explore
JSON Preview renders formatted JSON with collapsible regions. JSON Tree Viewer turns a document into an explorable, searchable tree. JSON Inspector reports structure stats — size, depth, type counts. JSON Flatten and Unflatten convert between nested objects and single-level dot-notation keys, handy for tabular exports or simple key lookups.
JSON Relationship Viewer goes further: it detects entities (arrays of records with ids) and the foreign-key fields between them, then draws a draggable graph of how they reference each other.
Convert
Bidirectional converters: JSON ⇄ YAML, JSON ⇄ CSV, JSON ⇄ XML. JSON to Table turns an array of records into a sortable, filterable table. JSON to Code generates Go, Python, Java, Rust, C#, PHP, and more from your data. JSON to TypeScript produces typed interfaces with optional readonly and JSDoc.
Generate & test
JSON Placeholder API is a full mock REST API (users, posts, comments) you can fetch against for prototyping and learning. JSON Escape/Unescape handles JSON-in-string encoding. JSON Editor is a full Monaco-powered editor for hands-on editing.
Why everything runs client-side
Every tool executes in your browser — no backend stores or forwards your data. That makes them safe for configs, credentials, and production payloads, and instant (no upload round-trip). The only server-side pieces are the optional AI repair endpoint (which sees only the snippet you send) and the placeholder API for mocking.
FAQ
- Are all the tools free?
- Yes — every tool is free with no sign-up. The AI JSON repair has a per-IP rate limit to keep costs sane, but the rest are unlimited.
- Which tool should I use to fix broken JSON?
- Start with JSON Formatter (it reports parse errors), or JSON Repair if the input is badly malformed. For API payloads with a known shape, JSON Validator against a schema gives the clearest error messages.
- Can I use these offline?
- Most tools run fully client-side once the page loads, so they work without a network. The AI repair and placeholder API require connectivity.
Related articles
What is JSON? A Complete Beginner's Guide →
JSON (JavaScript Object Notation) is a lightweight data-interchange format that's easy for humans to read and for machines to parse. Learn the syntax, data types, and structure that power modern APIs.
The History of JSON: From 2000 to Industry Standard →
Trace JSON from Douglas Crockford's idea in 2001, through Yahoo's adoption, to becoming the ECMA-404 standard that powers 90% of modern APIs.
The Complete JSON Schema Guide (Draft 7) →
JSON Schema is the standard for describing and validating JSON structure. Learn the core keywords, build a real API schema, and apply best practices.