Free JSON to Database Tables
& SQL Converter Online

Easily Convert JSON Files to Database Tables and SQL Online - Fast, Secure & Free!
100% Automation. 0% Coding

Upload fileJSON to Database Tables and SQL
Upload fileAI Optimised Output
Upload fileFast Processing

Convert JSON data into a Snowflake database (and many others with our Enterprise version). Obtain login credentials and access the database. Execute SQL queries on the converted tables.
Receive a detailed ER Data Model of the Database table structure and a source-to-target mapping file to ensure accurate data lineage

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Upload your JSON

We protect your data using SSL encryption

Step 1/3

*Maximum file size 1 MB (compressed as ZIP). Limit applies to free Flexter trial only.

How it works:

Step 1
Upload JSON
Drag and drop your JSON file(s) or upload a compressed ZIP file directly.
Step 2
Enter Your Email
We'll send you a secure link to download your converted data.
Step 3
Download Database Output
Access your converted data in a Snowflake database with SQL queries.

What Will You Receive?

Once the conversion is complete, you'll receive an email with:

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Login details to a Snowflake database: Query your converted data with SQL.

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Data Structure Documentation: ER Data Model in PDF and SVG formats.

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Source-to-Target Mapping: Comprehensive Excel file outlining data lineage and source to target maps for tables and columns in Snowflake Database.

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ReadMe File: Step-by-step guide to handle your converted data.

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Why Use Flexter's JSON to Database and SQL Converter?

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100% Automation: Save time with fully automated JSON to Database and SQL conversion.

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Zero Coding Required: No technical skills needed - just upload your file and receive your data.

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Parent-Child Relationship Handling: Retain hierarchical JSON structures in CSV and TSV for accurate representation.

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Fast processing: Get your converted data as tables in a Snowflake database in minutes.

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Secure Processing: Data is encrypted with SSL for complete safety and reliability.

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Scalability: Handle large, complex JSON files easily (Flexter Enterprise version available ).

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Free Tool: Unlimited use with no hidden fees.

Why Convert JSON to a Database and SQL?

Databases provide a structured and scalable way to store and query JSON data efficiently. By converting JSON into relational tables, you can leverage SQL to perform complex queries, aggregations, and data transformations with ease. This process simplifies handling hierarchical JSON structures by mapping them into a relational format, ensuring better accessibility and performance.

With a database-driven approach, you benefit from optimised indexing, data integrity, and seamless integration with analytics and reporting tools. Using SQL, you can efficiently retrieve, manipulate, and analyze data without the limitations of flat files, making it ideal for enterprise-scale applications and data-driven decision-making.

Customer reviews

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"Extracting useful data and importing it into our RDMS very quickly and safely has been a very important benefit for our work"

menBruno AElectrical engineer
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"Significantly the best benefit is the time savings of having this software implement the conversion because manually it would take too many hours and not achieve the perfect success as flexter does"

menAndrew RSystems Engineer
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"A considerable saving of time where it helped me to eliminate workload and be able to make better decisions designed with the data obtained"

menJames FCommercial engineering

Advanced JSON to SQL/Database with Flexter Enterprise

For large-scale or complex JSON to SQL/Database requirements, Flexter Enterprise offers:

Unlimited Data Volume

Unlimited Data Volume

Process JSON files of any size and volume effortlessly.

Custom Schema Automation

Custom Schema Automation

Generate and map target schemas automatically.

API Integration

API Integration

Seamlessly embed conversion into existing workflows.

Direct Database Output

Direct Database Output

Convert JSON to databases like Snowflake, Oracle, or MySQL—or export files in formats like CSV, TSV, Parquet, and Delta Tables.

Metadata Management

Metadata Management

Advanced capabilities for schema evolution, data lineage, and compatibility with both cloud and on-premise systems.

Whether you're managing enterprise-level data or seeking efficient automation, Flexter Enterprise is designed to tackle even the most demanding JSON conversion projects.

Start converting JSON with Flexter Enterprise

Want to learn more about JSON to Database & SQL conversion?

How to Insert JSON Data into SQL Table?

How to Insert JSON Data into SQL Table?

"Learn about schema on read, on write, and automated JSON conversion techniques. Discover efficient methods with our comprehensive guide now.

Read More
Understand the differences and use cases.

Understand the differences and use cases.

Explore the key differences between CSV, JSON, & XML. Find out which data format is best for your project with clear examples for 2024.

Read More
How to Parse JSON Data in SQL Server (2025 Guide)

How to Parse JSON Data in SQL Server (2025 Guide)

Learn how to parse JSON in SQL Server using SQLJSON, XQuery, OPENROWSET, BULK INSERT & more. Explore tools, examples, and automation tips.

Read More
How to Parse & Flatten JSON in Snowflake with Examples

How to Parse & Flatten JSON in Snowflake with Examples

Learn How to Parse, Flatten, and Query JSON in Snowflake with Examples. Explore manual and automated JSON conversion techniques.

Read More

Full tool capability data sheet

Explore the technical capabilities of our free JSON conversion tool and Flexter to understand
your options for converting JSON data, including database and ETL integrations.

DataFree FlexterEnterprise Flexter
Data volumeUpto 1MBAny
Overwritetick
Appendtick
AccessFree FlexterEnterprise Flexter
APItick
Command Linetick
WebUItick
Formats (input)Free FlexterEnterprise Flexter
XMLticktick
JSONtick
TSV, CSV, PSV etc.tick
RDBMStick
Databases (output) Free FlexterEnterprise Flexter
Snowflaketicktick
Oracletick
MySQLtick
PostgreSQLtick
Teradatatick
Redshifttick
MS SQL Servertick
Azure SQL Data Warehousetick
Yellowbricktick
BigQuerytick
Databrickstick
AWS Athenatick
Query engines (output) Free FlexterEnterprise Flexter
Hivetick
Impalatick
File formats (output) Free FlexterEnterprise Flexter
CSVticktick
TSVticktick
Excelticktick
ORCtick
Delta Tabletick
Parquettick
Avrotick
Automation Free FlexterEnterprise Flexter
Target schematicktick
Mappingsticktick
Parent - child relationshipsticktick
Conversionticktick
Documentationticktick
Optimisation algorithms Free FlexterEnterprise Flexter
Elevateticktick
Reuse (XSD only)ticktick
Namingticktick
Schema generation Free FlexterEnterprise Flexter
JSON sampletick
XML sampleticktick
XSDtick
XSD + XML sampleticktick
Databasetick
Texttick
Sources Free FlexterEnterprise Flexter
FTP, SFTPtick
Object storage(S3, ADLS, Azure Blob etc.)tick
HTTP(S)tick
HDFStick
Network drivetick
Local file systemtick
Uploadtick
Change intelligence and management Free FlexterEnterprise Flexter
Metadata Catalogtick
Schema version difftick
Schema evolutiontick
Data lineagetick
ER diagramtick
Platforms Free FlexterEnterprise Flexter
Virtual Machine / Servertick
Kubernetestick
Databrickstick
Sparktick
LocationFree FlexterEnterprise Flexter
Google Cloud (GCP)Google Cloud (GCP)tick
AWStick
Azuretick
On-premisetick
SupportFree FlexterEnterprise Flexter
E-mailticktick
Phonetick

Book a demo of Flexter

And automate your most complex JSON conversion requirements

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FAQs

What is Flexter and what does it do?

Flexter is an enterprise data integration tool that specializes in automating the conversion of large and complex XML and JSON files into tabular or relational formats. This allows the data to be easily loaded into SQL databases, data lakes, and big data platforms for analysis. Flexter is designed to handle the complexities of hierarchical data, freeing up data engineers to focus on generating insights rather than data wrangling.

How does the XML & JSON to SQL conversion process work?

The conversion process with Flexter involves two main steps:

  1. Data Flow Creation: Flexter analyzes a sample of the JSON to create a data flow. This data flow defines the logical target schema and the mappings from the source JSON to the target tables.
  2. Data Conversion: Flexter then uses this data flow to process the JSON data and load it into the specified target format, e.g. a SQL database.

What are the key benefits of using Flexter for XML & JSON conversion?

Flexter offers several key advantages, including:

  • Automation: It automates the entire conversion process, from schema generation to data loading
  • Cost and Time Savings: By eliminating manual coding, Flexter significantly reduces development time and costs.
  • Increased Productivity: It frees up data engineers from repetitive data conversion tasks, allowing them to focus on higher-value activities.
  • Scalability: Built on Apache Spark, Flexter can handle large volumes of data and scales linearly to meet demand.
  • Accuracy: Automation reduces the risk of human error in the data preparation process.

Flexter Delivers Normalised Data from Complex XML & JSON Files?

Yes, Flexter is designed to automatically generate a normalised version of XML & JSON documents. The tool specializes in converting complex, semi-structured XML & JSON documents into a structured, relational format suitable for databases and analytics platforms.
Flexter's process involves intelligently transforming the hierarchical nature of XML & JSON data into a set of normalised and interconnected tables This is a key differentiator from basic flattening tools that might produce a single, denormalised table.

Have questions about JSON or XML conversion? Find the answers in our comprehensive FAQ.
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