Convert JSON to SQL Online - Free, Local & Instant
Instant JSON (.json) to SQL (.sql) converter. 100% client-side processing in your browser RAM — zero file uploads, full privacy, drag & drop or paste raw text.
Technical Comparison: JSON vs SQL
Data & Dev Config| Specification | JSON (Source) | SQL (Target) |
|---|---|---|
| Full Specification | JavaScript Object Notation | Structured Query Language (CREATE + INSERT statements) |
| File Extension & MIME | .json (application/json) | .sql (application/sql) |
| Data Typing Model | Strict (strings, numbers, booleans, arrays, objects, null) | Typed relational columns (INTEGER, REAL, BOOLEAN, VARCHAR, TEXT) |
| Structure & Hierarchy | Deeply nested trees & arrays | Relational table schema with batch INSERT tuples |
| Comments Support | Not supported in RFC 8259 (supported via relaxed parser) | Supported (-- single line and /* block */) |
| Primary Ecosystem | REST APIs, web apps, NoSQL document stores, modern configs | PostgreSQL, MySQL, SQLite, MariaDB, Supabase database seeding |
JSON to SQL — Before & After Example
[
{
"id": 1,
"name": "Alice Johnson",
"email": "alice@example.com",
"role": "admin",
"active": true,
"score": 98.5,
"address": {
"city": "Berlin",
"country": "DE"
}
},
{
"id": 2,
"name": "Bob Smith",
"email": "bob@example.com",
"role": "editor",
"active": false,
"score": 87,
"address": {
"city": "Austin",
"country": "US"
}
},
{
"id": 3,
"name": "Chiara Rossi",
"email": "chiara@example.com",
"role": "viewer",
"active": true,
"score": 91.25,
"address": {
"city": "Milan",
"country": "IT"
}
}
]
CREATE TABLE my_table ( id INTEGER, name VARCHAR(255), email VARCHAR(255), role VARCHAR(255), active BOOLEAN, score REAL, "address.city" VARCHAR(255), "address.country" VARCHAR(255) ); INSERT INTO my_table (id, name, email, role, active, score, "address.city", "address.country") VALUES (1, 'Alice Johnson', 'alice@example.com', 'admin', TRUE, 98.5, 'Berlin', 'DE'); INSERT INTO my_table (id, name, email, role, active, score, "address.city", "address.country") VALUES (2, 'Bob Smith', 'bob@example.com', 'editor', FALSE, 87, 'Austin', 'US'); INSERT INTO my_table (id, name, email, role, active, score, "address.city", "address.country") VALUES (3, 'Chiara Rossi', 'chiara@example.com', 'viewer', TRUE, 91.25, 'Milan', 'IT');
Frequently Asked Questions: JSON to SQL
How do I convert JSON to SQL online without uploading sensitive files? ▾
Paste your JSON data or drag and drop a .json file into the converter above. ZeroUpload parses JSON and serializes SQL 100% inside your browser RAM using local JavaScript—no bytes are ever sent to an external server.
How are nested objects or tabular columns mapped between JSON and SQL? ▾
When converting hierarchical structures (Deeply nested trees & arrays) and tabular or config formats (Relational table schema with batch INSERT tuples), our engine automatically flattens or unflattens dot-separated keys (such as address.city) and preserves numbers, booleans, arrays, and null values.
Is this JSON to SQL converter free for commercial and production config files? ▾
Yes. The tool is completely free, requires no account or API key, and works offline once loaded. Because execution happens in local memory, it is safe for proprietary JSON, database exports, and production secrets.
Can I convert SQL back to JSON? ▾
Yes! Click the "Swap (SQL → JSON)" button at the top of the workspace or use the reverse converter link at the bottom of this page for bidirectional conversion.