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
35 matching tools
Showing 35/173 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
Database ERD Visualizer
Inspect tables, columns, keys, indexes, and relationships from a local SQLite database or SQLite/PostgreSQL DDL, then export the diagram as SVG, PNG, Mermaid, or DBML.
Developer Tools
Database Schema Diff
Compare two PostgreSQL/SQLite DDL sources or SQLite files locally. Review table, column, index, and foreign-key changes and generate a non-executing migration draft.
Developer Tools
Web Font Inspector & Converter
Open TTF, OTF, WOFF, and WOFF2 files locally to inspect names, metrics, tables, glyph coverage, variable axes, embedding flags, and create real WOFF/WOFF2 conversions.
Developer Tools
PWA Manifest & App Icon Studio
Build manifest.webmanifest, PNG and ICO assets locally, preview maskable safe zones or inspect a public site through bounded SSRF-safe fetching.
Developer Tools
SQL Execution Plan Analyzer
Parse PostgreSQL, MySQL, SQLite, and DuckDB execution plans locally, normalize their operator trees, and review cardinality, loop, scan, filter, buffer, and spill clues.
Developer Tools
WCAG Web Accessibility Auditor
Audit sanitized HTML, a public page or Lighthouse JSON with WCAG 2.2 mappings, inspect affected elements and complete a manual keyboard, screen-reader, zoom and media checklist.
Developer Tools
JavaScript Bundle Analyzer
Analyze esbuild metafiles, webpack stats, source maps, Vite manifests or plain JavaScript assets locally, inspect module weight, compare baselines and enforce practical size budgets.
Developer Tools
Dependency License & NOTICE Auditor
Parse package manifests, lockfiles, CycloneDX and SPDX locally, normalize license expressions, apply allow, deny and review policies, and generate a third-party notice draft.
Developer Tools
Terraform Plan Risk Analyzer
Analyze terraform show -json output locally, summarize resource actions, apply delete and replacement budgets, flag conservative cloud risks and compare a baseline plan.
Developer Tools
YAML Configuration Workbench
Parse YAML 1.2 configuration, explore node paths, locate duplicate keys and alias issues, convert JSON, and compare against a baseline path by path.
Developer Tools
cURL Request Parser & Code Converter
Parse cURL URL, headers, cookies, body and form semantics locally, redact credentials, and generate normalized cURL, Fetch, Axios, Python, Go and PHP.
Developer Tools
XML / XPath Inspector
Inspect XML well-formedness and external-resource markers locally, browse stable node paths, manage namespaces, and run XPath 1.0 node-set or scalar queries.
Developer Tools
GraphQL Schema & Query Workbench
Use official GraphQL parsing and validation rules for Schema SDL and operations, explore types, generate a response skeleton and identify breaking schema changes.
Developer Tools
Nginx Reverse Proxy Config Auditor
Audit Nginx server, location, upstream and proxy_pass configuration in the browser, including TLS/SNI, WebSocket, timeout and URI replacement risks.
Developer Tools
Protobuf / .proto Inspector
Parse common proto2, proto3 and Editions syntax locally, flag field number, reserved, map, oneof, enum and JSON-name risks, and compare revisions.
Developer Tools
CloudEvents Builder & Validator
Create and inspect CloudEvents locally, validate required attributes and extensions, convert between JSON and HTTP bindings, and export safe handoff artifacts.
Developer Tools
Avro Schema Compatibility Inspector
Inspect Avro schemas locally with avsc, compare schema evolution in both directions, calculate canonical fingerprints, and encode or decode sample records.
Developer Tools
AsyncAPI Contract Workbench
Inspect AsyncAPI 2.x and 3.x documents locally, summarize servers, channels, operations and messages, visualize event flows, and draft a 3.1 migration.
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Helm Values & Schema Workbench
Combine values.yaml, an environment override and Helm set flags locally, validate values.schema.json, review dependencies, and export effective or redacted values.
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.