Developer Tools

Essential utilities for developers. 24 free online tools to boost your productivity.

24 Tools100% FreeBrowser-Based

URL Encoder/Decoder

Encode and decode URLs with encodeURI, encodeURIComponent, and their decode counterparts. Handle special characters in URLs and query parameters.

encodeURI & encodeURIComponentdecodeURI & decodeURIComponentSwap input/output+1

Code Diff Viewer

GitHub-style diff comparison tool for text, JSON, and code files. Compare changes side-by-side with split or unified view, perfect for code reviews and version control.

Split/Unified ViewJSON SupportSyntax Highlighting+1

AI Code Converter

Convert code between 12+ programming languages instantly with AI. Translate Python, JavaScript, TypeScript, Java, C++, Go, Rust, and more. Includes syntax highlighting, explanations, and optimization options.

12+ LanguagesAI-PoweredSyntax Highlighting+1

Webhook Tester

Test and debug webhooks in real-time. Generate unique webhook URLs, inspect incoming requests with headers and payloads, customize responses, and view request history. Perfect for webhook development.

Unique URLsReal-Time UpdatesRequest Inspector+1

Regex Tester

Test and validate regular expressions with live matching and syntax highlighting. Comprehensive pattern library, multi-language code generation, and detailed match results. Perfect for regex development.

Live MatchingPattern LibraryCode Generation+1

SQL Formatter

Format and beautify SQL queries with proper indentation and syntax highlighting. Support for multiple SQL dialects (MySQL, PostgreSQL, SQLite, SQL Server). Minify SQL for production use.

Multi-Dialect SupportFormat & MinifySyntax Validation+1

IP Address Lookup

Discover your public IP address and get detailed geolocation information. View ISP details, timezone, coordinates, and support for both IPv4 and IPv6 addresses.

GeolocationISP InfoMap View+1

Website Screenshot Tool

Capture high-resolution screenshots of any website. Full-page capture or viewport only, multiple device sizes, and instant download. Perfect for documentation and testing.

Full PageDevice SizesHigh Resolution+1

API Request Tester

Lightweight Postman-like tool to test REST APIs directly in your browser. Send GET, POST, PUT, DELETE requests with custom headers, body, and authentication. Save request presets and share with teams.

All HTTP MethodsCustom HeadersSave Presets+1

GraphQL Playground

Interactive GraphQL playground and API tester. Write queries, explore schemas, test mutations, and inspect responses with real-time validation. Includes sample queries and history tracking.

Query BuilderVariables SupportHistory & Favorites+1

JWT Decoder & Inspector

Decode, verify, and validate JSON Web Tokens (JWT) securely in your browser. View header, payload, and signature. Validate token expiry and structure without server calls.

Decode JWTVerify SignatureExpiry Check+1

YAML ↔ JSON Converter

Convert YAML to JSON and vice versa with syntax highlighting and validation. Perfect for Kubernetes configs, Docker Compose files, and API specifications.

YAML ⇄ JSONSyntax HighlightValidation+1

Dockerfile Formatter & Linter

Beautify and lint Dockerfiles with best practices and security recommendations. Auto-format with proper indentation, detect common issues, and optimize build layers.

Auto FormatBest PracticesSecurity Checks+1

JWT Debugger & Decoder

Decode, verify, and debug JSON Web Tokens (JWT) with full support for multiple algorithms. Generate new tokens, validate signatures, check expiration, and inspect claims. Perfect for API debugging and authentication troubleshooting.

Decode JWTVerify SignatureGenerate Tokens+1

Cron Expression Builder

Visual cron expression generator with human-readable explanations and platform-specific syntax. Build cron schedules with dropdowns, preview next 10 execution times, and validate expressions. Supports Unix, Quartz, AWS, Spring, and Kubernetes formats.

Visual BuilderHuman-Readable30+ Presets+1

Cron Expression Parser

Parse and validate cron expressions with live execution previews. Export configurations for Kubernetes CronJobs, GitHub Actions, GitLab CI/CD, AWS, and standard crontab. Ideal for DevOps workflows.

Expression ValidationExecution PreviewMulti-Platform Export+1

Prompt Formatter

Format and optimize prompts for AI models. Enhance clarity and structure to get better responses from language models.

Prompt OptimizationAI Model CompatibilityReal-time Preview+1

Browser Fingerprint Viewer

Discover your unique browser fingerprint and device characteristics. View user agent, canvas fingerprint, WebGL renderer, screen resolution, installed fonts, and more for privacy awareness.

Device InfoCanvas FingerprintWebGL Data+1

Network Speed Test

Test your internet connection speed directly in the browser. Measure download speed, upload speed, latency, and jitter with real-time results.

Download SpeedUpload SpeedLatency Test+1

File Metadata Inspector

Inspect file metadata without uploading. View MIME type, file size, hash (MD5/SHA-256), creation date, and technical properties. Perfect for debugging and file verification.

MIME TypeFile HashSize Analysis+1

AI Prompt Explainer

Analyze and optimize AI prompts for better results. Get suggestions to improve clarity, structure, and effectiveness. Learn prompt engineering techniques with AI-powered insights.

Prompt AnalysisOptimization TipsBest Practices+1

AI JSON Analyzer

Understand complex JSON structures with AI-powered analysis. Get natural language summaries, detect patterns, explain data relationships, and debug JSON with GPT function calling.

Structure SummaryPattern DetectionRelationship Mapping+1

AI Command Explainer

Explain complex CLI commands in plain English with AI assistance. Understand bash, git, docker, kubectl commands with detailed breakdowns. Free for basic explanations, unlimited with Pro.

Command BreakdownParameter ExplanationSafety Warnings+1

AI Snippet Generator

Generate code snippets instantly with AI. Create functions, classes, regex patterns, SQL queries, and more. Free tier includes basic snippets, unlimited generation with Pro subscription.

Multi-Language SupportContext-AwareInstant Generation+1