About JSON to SQL Converter
The JSON to SQL Converter is an online tool that allows you to convert JSON data into properly formatted SQL statements. Whether you want to generate INSERT, UPDATE, CREATE TABLE, or both CREATE and INSERT statements, this tool helps you transform structured JSON into ready-to-use SQL code instantly.
You can either paste JSON data directly or upload JSON/TXT files, configure conversion settings, preview the generated SQL with syntax highlighting, and download the final SQL file.
This tool is ideal for developers, database administrators, backend engineers, and anyone working with structured data and relational databases.
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data format used to store and exchange structured information. It is commonly used in:
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APIs
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Web applications
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Configuration files
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Data exports
Example JSON:
[
{"id": 1, "name": "John", "email": "john@example.com", "active": true},
{"id": 2, "name": "Jane", "email": "jane@example.com", "active": false}
]
Your JSON to SQL tool reads this structured data and converts it into valid SQL statements.
What is SQL?
SQL (Structured Query Language) is used to manage and manipulate relational databases.
This tool generates:
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CREATE TABLE statements
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INSERT INTO statements
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UPDATE statements
All SQL output is automatically formatted and ready to execute in your database.
How to Use the JSON to SQL Converter
Below is a complete explanation of every UI component and what it does.
Step 1: Choose Input Method
Paste JSON Data (Default Tab)
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Click “Paste JSON Data” tab.
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Paste your JSON into the large textarea.
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The tool automatically focuses on the input area.
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A preview item appears showing the character count.
Use this option when you want quick conversion without uploading a file.
Upload File
Supported formats:
You can upload multiple files at once.
Each uploaded file appears in a file list with:
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File name
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File size
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Remove (X) button
Click the remove icon to delete a file before conversion.
Step 2: Configure SQL Options
Below the input area, you will find conversion settings.
Table Name Field
Input: “Table Name”
SQL Output Dropdown
Select the type of SQL you want to generate:
INSERT Statements
Generates:
INSERT INTO table_name (...) VALUES (...), (...);
All JSON objects are converted into a single multi-row INSERT statement.
UPDATE Statements
Generates:
UPDATE table_name
SET column = value
WHERE primary_key = value;
One UPDATE statement is created per JSON object.
When you select UPDATE:
CREATE TABLE
Generates:
CREATE TABLE table_name (...);
Column types are automatically inferred based on JSON values:
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BOOLEAN
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INTEGER
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REAL
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VARCHAR(255)
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TEXT
Both CREATE and INSERT (Default)
Generates:
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CREATE TABLE statement
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INSERT statement
Primary Key Field (Only for UPDATE Mode)
Appears only when SQL Output is set to UPDATE.
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Default value: id
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Must match a field in your JSON objects.
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The tool validates this in paste mode.
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Primary key comparison is case-insensitive.
The primary key is:
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Used in WHERE clause
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Excluded from SET clause
Step 3: Click “Convert to SQL”
The Convert to SQL button:
If conversion succeeds:
If there is an error:
How SQL Is Generated
CREATE TABLE Logic
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Uses first JSON object as schema sample.
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Infers SQL column types.
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Sanitizes column names (removes spaces/special characters).
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Converts everything to lowercase.
INSERT Statement Logic
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Uses keys from first JSON object as columns.
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Generates a single optimized multi-row INSERT statement.
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Escapes single quotes properly.
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Converts:
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null → NULL
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true/false → TRUE/FALSE
UPDATE Statement Logic
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Requires primary key.
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Generates one UPDATE per object.
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Matches primary key case-insensitively.
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Excludes primary key from SET clause.
SQL Preview Viewer
After conversion, each file displays a SQL preview card.
Each result card contains:
Copy Button
If clipboard fails, fallback method is used.
Fullscreen Button
Opens SQL in fullscreen viewer.
Fullscreen includes:
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Search field
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Fold/Unfold button
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Copy button
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Download dropdown
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Close button
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ESC key support
Search in SQL
Search is disabled for large SQL files.
Large File Handling
If generated SQL exceeds 50,000 characters:
A warning banner appears to inform the user.
Download Options
Each result file includes:
Download as SQL
Download as TXT
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Saves .txt file
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Content-Type: text/plain
Download All
Click Download All button to:
Data Validation & Error Handling
The tool checks:
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JSON must not be empty
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UPDATE mode requires array of objects (paste mode)
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Primary key must exist in JSON
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File must exist before processing
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JSON parsing errors are caught
If conversion fails:
Clear All Button
The Clear All button resets:
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Uploaded files
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Pasted JSON
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Table name
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SQL output type
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Primary key
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Results section
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SQL viewers
Why Use This JSON to SQL Tool?
Convert JSON to SQL online
Generate CREATE TABLE automatically
Generate optimized multi-row INSERT statements
Generate UPDATE statements with primary key
Upload or paste JSON data
Preview SQL with syntax highlighting
Search within SQL results
Copy full SQL instantly
Download SQL or TXT files
Download multiple files as ZIP
Who Can Use This Tool?
The JSON to SQL Converter provides a structured, reliable way to transform JSON data into properly formatted SQL statements. With flexible input methods, multiple output formats, interactive SQL preview, and full download support, it simplifies the process of converting structured data into database-ready queries.
