# Developer

Developer Developer Tools

Free browser-based developer developer tools. 97 tools — no installs, no sign-ups, open and use instantly.

97 tools available
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Content-Type Negotiator
Simulate HTTP content negotiation
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Binary XOR Calculator
Binary XOR Calculator for faster developer workflows
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CSV Column Reorder
Reorder CSV columns by drag and drop or manual order
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CSV Row Deduplicator
Find and remove duplicate rows from CSV data by one or more key columns
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CSV Transposer
Swap rows and columns of any CSV table instantly in your browser
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Docker Run to Compose
Docker Run to Compose for faster developer workflows
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GitHub Actions Workflow Builder
GitHub Actions Workflow Builder for faster developer workflows
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JS Event Listener Debugger
JS Event Listener Debugger for faster developer workflows
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JS Promise Visualizer
JS Promise Visualizer for faster developer workflows
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JSON Patch Builder
JSON Patch Builder for faster developer workflows
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JSON Size Estimator
JSON Size Estimator for faster developer workflows
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JSON to GraphQL Type
Convert JSON objects into GraphQL type definitions instantly
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JSON to Rust Struct
JSON to Rust Struct for faster developer workflows
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JSON to Swift Struct
Convert JSON to Swift Codable structs instantly
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JSON to Zod Schema
Convert JSON samples into Zod validation schemas for TypeScript
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JSON Type Analyzer
JSON Type Analyzer for faster developer workflows
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Password Entropy Calculator
Password Entropy Calculator for faster developer workflows
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SHA-3 Hash Generator
SHA-3 Hash Generator for faster developer workflows
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TOTP Code Generator
TOTP Code Generator for faster developer workflows
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Cron Next Run Calculator
Parse cron syntax and preview upcoming scheduled executions
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UUID v4 Bulk Generator
Bulk-generate uuid v4 values in one click
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Data Type Detector
Analyze a column and infer its data type automatically
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HTML Table to JSON
Paste html table → get structured json instantly
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JSON Schema Generator
Infer draft-07 schema from any json sample
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JSON to HTML Table
Render json arrays as formatted html tables
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JSON to TOML
Translate json objects into toml config syntax
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TOML to JSON
Parse toml and export structured json output
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XML Minifier
Strip whitespace and comments from xml for production
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JSON Escape / Unescape
Escape and unescape JSON strings safely
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JSON Key Sorter
Sort JSON keys alphabetically
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JSON Flattener
Flatten nested JSON structures
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JSON Unflattener
Rebuild nested JSON from flat keys
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JSON Key Renamer
Rename JSON keys in bulk
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JSON Value Search
Search keys and values inside JSON
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JSON Duplicate Key Detector
Detect duplicate keys in raw JSON
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JSON Array Filter
Filter JSON arrays by rules
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JSON Array Sorter
Sort JSON arrays by field
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JSON Merge Tool
Merge two JSON documents
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JSON Splitter
Split large JSON into smaller chunks
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JSON Lines Formatter
Format NDJSON and JSONL files
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JSON Lines to JSON
Convert JSONL to JSON array
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JSON to PHP Array
Convert JSON into PHP array syntax
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JSON to Python Dict
Convert JSON into Python dict syntax
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JSON to Java Class
Generate Java classes from JSON
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JSON to C# Class
Generate C# models from JSON
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JSON to Go Struct
Generate Go structs from JSON
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JSON to Kotlin Data Class
Generate Kotlin data classes from JSON
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OpenAPI Snippet Generator
Generate API request snippets from endpoint data
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Env File Generator
Generate .env example files
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dotenv Parser
Parse .env files safely
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Port Conflict Checker
Check port conflicts in configs
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Conventional Commit Generator
Generate conventional commit messages
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Branch Name Generator
Generate clean Git branch names
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Release Notes Formatter
Format release notes cleanly
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Issue Template Generator
Generate issue templates
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PR Template Generator
Generate pull request templates
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HTTP Mock Response Builder
Generate mock HTTP responses
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JSON Faker Template Builder
Build fake data templates
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Pagination Calculator
Calculate pagination values
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Rate Limit Calculator
Estimate API rate limits
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Feature Flag Config Builder
Generate feature flag configs
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Launch Checklist Generator
Generate launch checklists
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Status Page Incident Template
Generate incident update templates
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Uptime Percentage Calculator
Calculate uptime from downtime
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SLA / SLO Calculator
Calculate SLA and SLO targets
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Form Validation Rule Builder
Generate form validation rules
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Keyboard Shortcut Cheat Sheet Builder
Generate shortcut reference tables
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Embed Code Generator
Generate iframe and script embeds
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JSON Formatter
Format & validate JSON instantly
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Code Diff Viewer
Compare and diff code viewer
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Cron Expression Tester
Test cron expressions and preview next runs
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Git Command Builder
Build git commands from plain English
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Gitignore Generator
Gitignore Generator — free online tool
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README Generator
README Generator — free online tool
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Changelog Generator
Changelog Generator — free online tool
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License Generator
License Generator — free online tool
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Environment Variable Validator
Validate Environment Variable syntax instantly
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Semver Calculator
Calculate semver instantly
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Package.json Validator
Validate Package.json syntax instantly
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Makefile Generator
Makefile Generator — free online tool
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Docker Compose Generator
Docker Compose Generator — free online tool
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Dockerfile Generator
Dockerfile Generator — free online tool
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SQL Formatter
Format and beautify SQL code
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SQL to NoSQL
SQL to NoSQL — free browser-based tool
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GraphQL Formatter
Format and beautify GraphQL code
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YAML Formatter
Format and beautify YAML code
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YAML to JSON
YAML to JSON — free browser-based tool
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JSON to YAML
JSON to YAML — free browser-based tool
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TOML Formatter
Format and beautify TOML code
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XML Formatter
Format and beautify XML code
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XML to JSON
XML to JSON — free browser-based tool
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JSON to XML
JSON to XML — free browser-based tool
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CSV to SQL
CSV to SQL — free browser-based tool
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SQL to CSV
SQL to CSV — free browser-based tool
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Mock Data Generator
Mock Data Generator — free online tool
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Lorem JSON
Lorem JSON — free browser-based tool
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API Mock Generator
API Mock Generator — free online tool
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