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Web Tools & Utilities

Free online tools for everyday tasks. Simple, fast, secure and easy to use. Works entirely in your browser – your data stays with you.

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Discover specialized tools with detailed comparisons, best practices, and comprehensive guides for each category.

Diagram Tools

Create professional diagrams with code using Mermaid, GraphViz, D2, and GnuPlot for flowcharts, architecture diagrams, and data visualization.

4 tools
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Code Tools

Browser-based code editors with real-time execution for 13+ programming languages including Python, TypeScript, Java, Go, and more.

13 tools
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Data & Config Tools

Professional data processing tools for JSON, YAML, and CSV. Format, validate, compare, and transform data structures with schema validation.

8 tools
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Compare & Diff Tools

Advanced file and code comparison tools with semantic analysis and security validation for text, code, JSON, and YAML.

6 tools
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Web Development Tools

Essential web development tools including HTML/CSS/JS playground, Markdown editor, TypeScript compiler, and MJML email templates.

4 tools
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Productivity Tools

Boost productivity with AI-powered writing, cron scheduling, timezone conversion, and intelligent merging tools for developers and teams.

4 tools
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Need something specific? Browse all our tools or use our search feature.

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Explore all tools

Browse all available tools or use the search feature to find exactly what you need.

AI-Powered Online Notepad

Online AI-powered notepad with grammar checking, writing assistance, and rich text formatting. Perfect for resumes, cover letters, and research papers.

Features
AI-Powered Writing AssistantGrammar & Style CheckingRich Text EditingLaTeX & Advanced FormattingCollaborative WorkspaceAuto-Saving & Local StorageImport & Export OptionsMedia Embedding
Categories
TextBusinessUtility

Data Comparison Tool

Online data comparison tool with Excel/CSV import and visual difference highlighting. Perfect for dataset analysis and version tracking.

Features
Excel/CSV file importInteractive column mappingKey-based row matchingHighlighted differencesFiltering and sortingExport to Excel/CSV
Categories
DataBusinessUtility

Mermaid Diagram Editor

Online Mermaid diagram editor with real-time preview and multiple diagram types. Perfect for flowcharts, documentation, and system design.

Features
Real-time diagram previewMultiple diagram typesExport as SVG/PNGShare diagramsDark mode supportSample templates
Categories
DevelopmentDesignDevOps

D2 Diagram Editor

Online D2 diagram editor with AI assistance, real-time preview, and SVG/PNG export. Perfect for architecture, system, and process diagrams.

Features
AI-powered diagram generationReal-time diagram previewMultiple layout enginesExport as SVG/PNGShare diagramsDark mode supportSample templatesBuilt-in syntax reference
Categories
DevelopmentDesignDevOps

GraphViz DOT Editor

Online GraphViz DOT editor with real-time preview for network diagrams, flowcharts, and organizational charts

Features
Real-time DOT previewMultiple layout enginesExport as SVG/PNGShare diagramsAI diagram generationDark mode supportSample templates
Categories
DevelopmentDesignDevOps

World Time Zone Converter

Online timezone converter with multi-zone comparison and visual timeline display. Perfect for scheduling meetings and managing global teams.

Features
Multi-Timezone ComparisonBusiness Hours VisualizationDST Smart DetectionTime Travel SliderSmart Timezone SearchShare & Export
Categories
BusinessUtility

Julia Editor

Online Julia editor with real-time execution and scientific computing libraries. Perfect for data science and numerical computing.

Features
Julia ExecutionStandard LibrariesMultiple DispatchError AnalysisScientific ComputingCode Sharing
Categories
CodeDevelopmentAI

Lua Editor

Online Lua editor with real-time execution and standard library support. Perfect for game scripting and embedded programming.

Features
Lua ExecutionConsole OutputStandard LibraryError HandlingMetatable SupportCode Sharing
Categories
CodeDevelopmentAI

Go Editor

Online Go editor with real-time execution and concurrency features. Perfect for learning Go and building scalable applications.

Features
Go ExecutionStandard LibraryConcurrencyError HandlingPackage SupportCode Sharing
Categories
CodeDevelopmentAI

Ruby Editor

Online Ruby editor with real-time execution and object-oriented programming. Perfect for web development and automation scripting.

Features
Ruby ExecutionConsole OutputStandard LibraryError DetectionLimited Gem SupportCode Sharing
Categories
CodeDevelopmentAI

C/C++ Editor

Online C/C++ editor with real-time compilation and standard library support. Perfect for system programming and algorithm development.

Features
Code ExecutionConsole OutputStandard LibraryError DetectionMemory SafetyCode Sharing
Categories
CodeDevelopmentAI

SQL Editor

Online SQL editor with query execution and syntax highlighting. Perfect for learning SQL and database development.

Features
SQL ExecutionQuery ResultsSyntax HighlightingError DetectionSample DatabasesQuery History
Categories
DataCodeAI

PHP Editor

Online PHP editor with real-time execution and web integration features. Perfect for learning PHP and server-side development.

Features
PHP ExecutionWeb IntegrationError HandlingConsole OutputCode SharingFile Import/Export
Categories
CodeWebAI

Python Editor

Online Python editor with real-time execution and standard library support. Perfect for learning Python and data science.

Features
Python ExecutionConsole OutputStandard LibraryError HandlingCode SharingFile Import/Export
Categories
CodeDevelopmentAI

TypeScript Editor

Online TypeScript editor with real-time compilation and type checking. Perfect for learning TypeScript and web development.

Features
Real-time compilationType checkingWeb integrationError detectionES6+ supportDOM type safety
Categories
CodeWebAI

Cron Expression Generator

Visual crontab generator with real-time preview and plain English descriptions.

Features
Visual schedule builderReal-time previewPlain English translationsCommon schedule templates
Categories
DevOpsUtility

YAML Editor

Online YAML editor with schema validation and multi-document support. Perfect for configuration files and DevOps workflows.

Features
Schema validationMulti-document supportJSON conversionReal-time validationError detection
Categories
DataDevOpsAI

Markdown Editor

Online Markdown editor with live preview and GitHub-flavored syntax. Perfect for documentation and content creation.

Features
Live previewGitHub flavoredExport options
Categories
TextDevelopment

JSON Editor

Online JSON editor with formatting, validation, and tree view. Perfect for API development and data processing.

Features
Format & beautifySchema validationTree viewError checkingSearch & filter
Categories
DataDevelopmentAI

HTML/CSS/JS Playground

Online HTML/CSS/JS playground with live preview and multiple panes. Perfect for web development and prototyping.

Features
Live previewThree-panel editingInteractive consoleCode formattingSyntax highlighting
Categories
WebDevelopmentCode

R Online Editor

Online R editor with real-time execution and statistical computing libraries. Perfect for data science and statistical analysis.

Features
R code executionStatistical computingData visualizationReal-time console outputStatistical functions libraryAI-powered code assistanceCode sharing and collaboration
Categories
CodeDataDevelopment

C# Online Editor

Online C# editor with real-time execution and .NET framework support. Perfect for learning C# and enterprise development.

Features
C# code executionObject-oriented programming.NET Base Class LibraryCollections supportReal-time console outputAI-powered code assistanceEnterprise development patterns
Categories
CodeDevelopmentAI

Java Online Editor

Online Java editor with real-time execution and JVM support. Perfect for learning Java and enterprise development.

Features
Java code executionObject-oriented programmingJava Standard LibraryStream API supportReal-time console outputAI-powered code assistanceEnterprise development patterns
Categories
CodeDevelopmentAI

MJML Email Editor

Online MJML editor with real-time compilation and responsive email design. Perfect for creating professional email templates.

Features
MJML compilationResponsive email designComponent libraryLive email previewAI-powered template generationExport and sharing
Categories
DesignWebDevelopment

PostgreSQL Query Editor

Online PostgreSQL editor with syntax highlighting and advanced SQL features. Perfect for database development and query optimization.

Features
SQL syntax highlightingQuery templatesDatabase schema designAdvanced PostgreSQL featuresPerformance optimizationAI-powered query assistanceCode sharing and collaboration
Categories
DataDevelopmentCode

GnuPlot Diagram Editor

Online Gnuplot editor with real-time SVG preview. Plot functions, parametric curves, and inline data. Export as SVG/PNG and share scripts.

Features
Live preview2D & 3D plot typesHeatmaps & contoursError bars & dual axesImport/export & sharingSample templatesPrivacy-first renderingAI diagram generation
Categories
DevelopmentDesignAI

Text Compare Tool

Compare text files and documents online with advanced analysis. Text comparison tool for file compare, document diff, and CSV comparison with hidden character detection, readability analysis, and security-focused validation.

Features
Dynamic Change Summary & AnalysisMulti-Factor Complexity ScoringSecurity-Focused Character DetectionComprehensive Document StatisticsIntelligent Structure RecognitionVisual Change BreakdownCSV & Data File SupportPrivacy-First Processing
Categories
TextUtilityDevelopment

JSON Compare Tool

Compare JSON files with semantic analysis and property-level merge editor

Features
Semantic JSON comparisonTree view of changesSchema validation integrationProperty-level conflictsArray merge strategiesFormat preservationURL sharingExport merged JSON
Categories
DataDevelopmentUtility

Code Compare Tool

Compare source code with syntax highlighting, intelligent merging, and semantic analysis for JavaScript, TypeScript, Python, Java, and C#.

Features
Semantic Code AnalysisVS Code-Style Line MergeMulti-Language Support (5+)Real-time Diff AnalysisProfessional Code EditorIntelligent Merge ResolutionAdvanced Filter OptionsMulti-Format Export
Categories
CodeDevelopmentUtility

YAML Compare Tool

Compare YAML files with structure preservation and comment handling for DevOps configurations

Features
Structure-aware comparisonComment preservationAnchor/alias supportIndentation validationKubernetes config focusDocker Compose supportYAML merge strategiesMulti-document support
Categories
DevOpsDataUtility

File Merger Tool

Merge PDF files, Word documents, Excel spreadsheets, and data files online with advanced options for page selection, bookmarks, and formatting preservation

Features
PDF File MergingExcel Spreadsheet MergingWord Document CombiningCSV Data File MergingJSON File CombinationXML File MergingText File MergingClient-Side ProcessingSmart Memory ManagementDrag & Drop Interface
Categories
UtilityBusinessData

More tools coming soon!

We're constantly adding new tools and utilities to help streamline your workflow. Check back regularly for updates.