Free Online Code Generators & Database Tools

Convert Linux file permissions between symbolic rwx bits and octal notation.

Convert a CSS declaration list into a JavaScript style object with camelCase names and preserved custom properties.

Infer a JSON Schema from CSV column names and sample values for API validation and data imports.

Turn CSV rows into safely quoted SQL INSERT statements for PostgreSQL, SQLite or MySQL, preserving cells as text.

Parse and structurally check a Docker Compose YAML document with actionable syntax feedback.

Compare single-line .env assignments locally, report missing or changed keys and hide values by default.

Generate a .gitignore starter from selected languages, tools and operating systems.

Convert JSON to Go struct definitions with type inference, json tags, and nested structs.

Generate batch INSERT statements from JSON and parse INSERT SQL back to JSON.

Test JSONPath expressions against JSON data and inspect matched values.

Infer a Draft 2020-12 JSON Schema from any sample JSON. Great for OpenAPI and Ajv/zod.

Generate Python Pydantic models from JSON Schema for validating API request and response data.

Convert a JSON Schema object definition into a SQL CREATE TABLE statement for relational database setup.

Generate TypeScript interfaces and type aliases from JSON Schema, including nested objects, arrays and local references.

Infer a BigQuery table schema from JSON records to prepare newline-delimited JSON loads.

Generate C# 11 model classes for System.Text.Json with nested types, JsonPropertyName attributes, required properties and nullable fields.

Generate a Dart model class with fromJson and toJson methods from a sample JSON object.

Create DynamoDB BatchWriteItem request JSON from a list of records for AWS data imports.

Format JSON documents as Elasticsearch Bulk API NDJSON actions for quick indexing and reindexing.

Generate GraphQL object types from representative JSON records for API schema design.

Generate a Java POJO from a JSON object with safe Java field names and original key comments.

Generate Kotlin models for kotlinx.serialization with nested classes, SerialName mappings, nullable types and defaults for missing fields.

Generate a MongoDB mongosh insertMany command from JSON records, with safe JSON serialization.

Convert JSON objects and arrays into ready-to-paste PHP array syntax while preserving nested values and Unicode text.

Generate a full Prisma schema file from a JSON object with inferred field types and models.

Turn JSON records into a Prisma Client createMany seed snippet for database development.

Generate Python 3.10+ dataclasses from JSON samples with nested classes, list types, nullable fields and merged record shapes.

Convert JSON values into Ruby hash and array syntax for scripts, fixtures and configuration.

Generate Rust structs with Serde derives, renamed fields, nested models and Option types from JSON sample records.

Generate SQL Server INSERT statements from a JSON object or array of records, with safely quoted identifiers and Unicode values.

Generate a Swift Codable model from a JSON object, including CodingKeys for property names that need conversion.

Instantly generate TypeScript interfaces from any JSON payload with nested type support.

Infer a Zod validation schema from JSON, including nested objects, arrays, unions, nullable values and fields missing in sample records.

Turn a JSON array of strings into safely single-quoted POSIX shell arguments without executing a command.

Escape literal text into a JavaScript regular-expression pattern, including punctuation, whitespace and Unicode edge cases.

Compare two strict SemVer 2.0.0 versions with correct prerelease ordering and build metadata handling.

Pretty-print SQL queries with configurable indentation and uppercase keywords for Postgres, MySQL, SQLite, MSSQL.

Convert a line-separated list into a quoted SQL IN predicate or numbered PostgreSQL parameters, preserving identifiers and handling empty lists.

Convert question-mark SQL bind placeholders to PostgreSQL $1 parameters, or back to ? with a parameter-order report.