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Developer Tools That Just Work

Format JSON, run SQL queries, write Java, format Python — all free, all instant, all in your browser.

All 📋 JSON 1 💻 Code 21 📝 Text 5 🗄️ Data 16 ⚡ Generator 5 📄 Diff Checker 2 📄 Devops 2 🍃 Spring Boot 11 🐍 Python 4
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Schema Studio Hub

Browse all Schema Studio tools — test data, migrations, API collections, converters, and JSON codegen.

Data 102 uses
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Test Data Generator

Generate SQL INSERTs, JSON fixtures, and CSV from CREATE TABLE statements.

Data 70 uses
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Load Test Data Pack

Generate 100, 1k, or 10k row seed packs for performance demos.

Data 54 uses
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CSV → SQL INSERT

Upload CSV and generate bulk INSERT statements.

Data 46 uses
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Anonymization Script Generator

Generate staging-safe UPDATE scripts to redact PII columns.

Data 56 uses
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Flyway / Liquibase Generator

Convert CREATE TABLE SQL into Flyway or Liquibase migration files.

Data 56 uses
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Postman / Bruno Collection Generator

Generate Postman v2.1 or Bruno collections with CRUD and auth headers.

Data 60 uses
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cURL Script Pack Generator

Download a bash script with CRUD cURL commands.

Data 60 uses
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API Contract Test Generator

REST Assured, Pest, or pytest contract test stubs.

Data 58 uses
DAT
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CSV ↔ JSON ↔ XML ↔ YAML

Convert tabular and structured data between CSV, JSON, XML and YAML in one click — all client-side.

Data 42 uses
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Mock Server Config Generator

WireMock mappings or OpenAPI spec for Prism mock server.

Data 52 uses
JWT
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JWT Decoder / Encoder

Decode JWT header and payload, verify HMAC signatures, or build and sign a new token with HS256/384/512 — all client-side.

Data 44 uses
New

Spring @Sql Fixture Generator

Generate test SQL fixtures and @DataJpaTest snippets.

Data 46 uses
HTTP
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HTTP Status Reference

Every standard HTTP status code with descriptions, developer tips and searchable/filterable interface.

Data 40 uses
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Laravel Factory & Seeder Generator

Generate Laravel Factory and Seeder classes from CREATE TABLE SQL.

Data 56 uses
OAS
New

OpenAPI / Swagger Viewer

Paste an OpenAPI 3.0 or Swagger 2.0 spec (JSON/YAML) to browse endpoints, parameters and responses in a clean interface.

Data 42 uses