Which developer workflows are covered?
The collection includes JSON and text processing, code formatting, API contracts, WebSocket sessions, regex, IDs, mock data, and browser-based SQL environments.
Developer Tools
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15 categoriesDeveloper Tools
16 tools available
Showing 16/72 tools · Developer Tools
JSON Formatter
Turn minified, messy, or hard-to-read JSON into a scannable hierarchy with error hints and field statistics.
Developer Tools
Code Formatter & Minifier
Format or minify JSON, SQL, HTML, CSS, JavaScript, TypeScript, and XML with language-aware parsing, syntax highlighting, auto-detection, dialect options, and local drafts.
Developer Tools
JSON Diff
Compare large JSON locally in the background with keyed object-array matching, three-way merging, JSON Schema validation, and a complete Patch workflow.
Developer Tools
JSONPath Query
Query large JSON locally with JSONPath, source location, table views, query history, and result exports.
Developer Tools
JSON Schema Validator
Validate JSON Schema locally with multiple drafts, multi-file references, issue location, sample generation, and bundle exports.
Developer Tools
JSON to Data Model
Generate TypeScript, Go, Java, and Python data models from JSON samples, JSON Schema, OpenAPI 3.x, or Swagger 2.0 while preserving required, nullable, enum, format, and nested structure semantics.
Developer Tools
OpenAPI / Swagger Inspector
Parse OpenAPI 3.0, 3.1, and Swagger 2.0 locally, explore endpoints, inspect conventions, resolve multi-file references, and generate examples and curl commands.
Developer Tools
WebSocket Inspector
Connect to ws/wss services in the browser, exchange text, JSON, and binary messages, and manage heartbeats, reconnects, filters, and session history.
Developer Tools
SQLite Playground
Create, open, query, and export SQLite databases locally with SQLite WebAssembly. Your data never leaves the browser.
Developer Tools
PostgreSQL Playground
Create, query, learn, and back up a local PostgreSQL database with PGlite WebAssembly, including schemas, JSONB, arrays, CTEs, and window functions.
Developer Tools
DuckDB Analytics Playground
Analyze CSV, TSV, JSON, NDJSON, and Parquet locally with DuckDB-Wasm, run analytical SQL, manage .duckdb databases, and learn DuckDB through interactive lessons.
Developer Tools
Text Diff
Compare text or code locally with line, word, and character highlighting, split and unified views, change merging, and Patch export.
Developer Tools
ID Generator & Parser
Generate UUID v4/v7, ULID, NanoID, and Snowflake IDs in one place, with batch export, time ordering, custom Snowflake layouts, and field-level parsing.
Developer Tools
Faker Identity Generator
Use faker-js/faker locally in your browser to generate names, identity documents, contacts, addresses, jobs, online profiles, and financial test data, including U.S. states with no statewide sales tax.
Developer Tools
Structured Mock Data Generator
Design a single table or a relational dataset locally in your browser and generate localized data with faker-js/faker. Supports foreign keys, dependency ordering, nested fields, uniqueness, null probability, ranges, enums, templates, and sequences, plus relational SQL DDL, multi-sheet Excel, JSON, CSV, TSV, YAML, and XML exports.
Developer Tools
Regex Tester
Debug regular expressions locally in the browser with flags, match highlighting, capture groups, named groups, and replacement preview.
Developer Tools
Developer tools for data, APIs, code, and database experiments
Move from an API payload to a schema, generated model, mock dataset, or SQL prototype without installing a separate utility. ToolRen combines focused inspectors with browser-based database workbenches for quick debugging and learning.
Frequently asked questions
Can I run a database without installing one?
Yes. Dedicated SQLite, PostgreSQL, and DuckDB playgrounds run compatible engines in the browser for queries, schema experiments, and learning.