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⚡ 121 Developer tools
JSON Formatter
Format and beautify JSON data with proper indentation and highlighting. Free online JSON formatter for readable code validation.
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JSON Minifier
Minify JSON data by removing whitespace and line breaks. Free online JSON compressor to reduce payload size for APIs. Supports json, minify.
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Base64 Converter
Encode and decode Base64 strings for data transmission. Free online Base64 converter for binary data and API payloads. Supports base64, encode.
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URL Encoder
Encode and decode URL strings to proper percent-encoding format. Free online URL encoder for safe web addresses and query parameters.
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HTML Encoder
Encode and decode HTML entities for special characters. Free online HTML encoder to escape tags, symbols, and attributes safely.
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CSS Minifier
Minify CSS stylesheets by removing whitespace and comments. Free online CSS compressor to reduce file size and speed up loading.
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JSON to XML
Convert JSON data to XML format with proper element mapping. Free online developer tool — browser-based, no upload. Supports json, xml.
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XML to JSON
Convert XML data to JSON format with attribute handling. Free online developer tool — browser-based, no upload. Supports xml, json.
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JSON to YAML Converter
Convert JSON data to YAML format instantly in your browser. Free online converter for configuration files with no data uploads.
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YAML to JSON Converter
Convert YAML configuration to JSON format instantly in your browser. Free online parser for structured JSON data locally.
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JSON Viewer
View and explore JSON data with collapsible tree visualization. Free online developer tool — browser-based, no upload. Supports json, viewer.
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JSON Editor
Edit JSON data visually with tree view, inline editing, and validation. Free online developer tool — browser-based, no upload.
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JSON Diff
Compare two JSON objects and highlight structural and value differences. Free online developer tool — browser-based, no upload.
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JSON Sorter
JSON Sorter: Sort JSON object keys alphabetically or recursively. Free online developer tool — browser-based, no upload.
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JSON Schema Generator
Generate JSON Schema from sample JSON data automatically. Free online JSON Schema generator for API validation. Supports json, schema.
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JSON Path Finder
Query JSON data using JSONPath expressions with filtering. Free online developer tool — browser-based, no upload. Supports json, path.
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HTML Formatter
Format and beautify HTML with proper indentation. Free online tool to clean up messy markup in your browser instantly. Supports html, format.
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HTML Escape
Escape HTML special characters like angle brackets and ampersands. Free online HTML escaper for preventing XSS in your browser.
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HTTP Status Codes
Quick reference for all HTTP status codes with descriptions, categories, and usage examples. Free online, no upload. 200 support included.
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XML Formatter
Format and beautify XML documents with proper indentation. Free online XML formatter for readable code and debugging. Supports xml, format.
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SQL Formatter
Format and beautify SQL queries with proper indentation and highlighting. Free online SQL formatter for readable database code.
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JS Minifier
Minify JavaScript code by removing whitespace and comments to reduce file size. Free online JS minifier for faster website loading.
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Regex Cheatsheet
Comprehensive regular expression cheatsheet with common patterns, syntax reference, and live testing. Free online, no upload.
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CSS Formatter
CSS Formatter: Format CSS with proper indentation and line breaks. Free online developer tool — browser-based, no upload.
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cURL to Code Converter
Convert cURL commands into equivalent code for fetch, axios, Python requests, Java HttpClient, Go net/http, and more — 100% local.
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Git Commands
Essential Git commands cheatsheet with common operations, branching, merging, and troubleshooting. Free online, no upload.
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Regex Tester
Test and debug regular expressions with live matching highlights. Free online regex tester for pattern validation in your browser.
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Regex Visualizer & Explainer
Visualize how a regex pattern matches text with a step-by-step animated diagram. Copy railroad diagrams and get pattern explanations.
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Diff Checker
Compare two text snippets and highlight differences line by line. Free online diff checker for code review and content changes.
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Code Diff Visualizer
Compare code side-by-side with syntax highlighting. Supports JSON structural diff, line-level changes, and merge-friendly output.
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Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Free online timestamp converter for debugging logs and APIs.
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JWT Decode
Decode and inspect JWT tokens, view header, payload, and signature. Free online developer tool — browser-based, no upload.
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JWT Encoder
Encode and generate JWT tokens with custom headers and payloads. Free online JWT encoder for authentication testing. Supports jwt, encode.
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Hex Converter
Convert between hexadecimal, binary, and decimal. Free online tool for developers in your browser. Supports hex, binary.
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Markdown Cheatsheet
Markdown syntax cheatsheet with formatting examples for headings, lists, code, tables, and more. Free online, no upload.
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Number Base Converter
Convert between binary, octal, decimal, and hexadecimal. Free online developer tool — browser-based, no upload. Supports number, base.
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CSV Viewer
View CSV data in a formatted table with sorting and filtering. Free online CSV viewer for data inspection in your browser.
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Keyboard Shortcuts
Quick reference for common keyboard shortcuts across Windows, Mac, and Linux. Free online developer tool — browser-based, no upload.
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IBAN Generator
Generate valid IBAN numbers for testing purposes. Free online tool to create mock banking data safely in your browser. Supports iban, generator.
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Chmod Calculator
Convert between numeric and symbolic chmod permissions. Free online developer tool — browser-based, no upload. Supports chmod, calculator.
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MAC Address Lookup
MAC Address Lookup: Look up vendor information from MAC address prefixes. Free online developer tool — browser-based, no upload.
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Git Cheatsheet
Git Cheatsheet: Quick reference for common Git commands and workflows. Free online developer tool — browser-based, no upload.
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Crontab Visual Generator
Build cron expressions visually with calendar preview and human-readable description — 100% local. Supports cron, crontab.
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Cron Parser
Parse cron expressions into human-readable time. Free online tool to debug schedules in your browser. Supports cron, schedule.
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JWT Cheatsheet
JWT structure explanation with header, payload, signature reference and common use cases. Free online developer tool — browser-based, no upload.
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HTTP Status Checker
Check HTTP status codes and response headers for any URL. Free online HTTP status checker for SEO and API debugging. Supports http, status.
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Mime Type Lookup
Look up MIME types for any file extension instantly. Free online reference tool for developers working in the browser. Supports mime, type.
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Base Convert
Convert numbers between binary, octal, decimal, and hex. Free online tool for developers working in your browser. Supports base, convert.
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HTML Tags Reference
Quick reference for HTML tags and attributes with descriptions, examples, and browser support. Supports html, tag. Element support included.
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JSON to SQL Converter
Generate SQL INSERT statements from JSON data. Free online tool for database developers in your browser. Supports json, sql.
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JSON to Postman
JSON to Postman: Convert JSON to Postman collection with request items. Free online developer tool — browser-based, no upload.
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JSON to TypeScript
Convert JSON to TypeScript interface and type definitions. Free online developer tool — browser-based, no upload. Supports json, typescript.
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JSON to Python
Convert JSON to Python dataclass definitions. Free online tool for developers to generate models in your browser. Supports json, python.
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JSON to Java
Convert JSON to Java class definitions with proper types. Free online developer tool — browser-based, no upload. Supports json, java.
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JSON to JavaScript
Convert JSON to JavaScript object and class definitions. Free online developer tool — browser-based, no upload. Supports json, javascript.
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JSON to Go
JSON to Go: Convert JSON to Go struct definitions with JSON tags. Free online developer tool — browser-based, no upload.
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JSON to Rust
Convert JSON to Rust struct definitions with serde derive. Free online developer tool — browser-based, no upload. Supports json, rust.
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Tech Stack Detector
Detect the technology stack of any website — frameworks, CMS, CDN, analytics, hosting, and more. Supports batch comparison of multiple sites.
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JSON to PHP
Convert JSON to PHP array and class definitions. Free online tool for web developers in your browser. Supports json, php.
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Numeronym Generator
Generate numeronyms like i18n, k8s, and a11y instantly. Free online tool for developers to abbreviate terms in browser. Supports numeronym, generator.
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Benchmark Tool
Run JavaScript performance benchmarks in your browser. Free online tool to test code speed and compare results. Supports benchmark, tool.
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JSON to Ruby
Convert JSON data into Ruby class definitions instantly. Free online tool for developers to generate models in the browser.
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CSS Unit Converter
Convert between CSS units (px, rem, em, vw, vh) with custom base values. Supports batch conversion. Free online, no upload.
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Data URI Generator
Convert files to Base64 Data URIs for embedding in HTML and CSS. Free online Data URI generator for inline images and fonts.
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JSON to C#
Convert JSON to C# class definitions with proper types. Free online developer tool — browser-based, no upload. Supports json, csharp.
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CSS Sprite Generator
Combine multiple images into a CSS sprite sheet with auto-generated CSS code. Supports @2x and ZIP export — 100% local. Supports css, sprite.
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Email Normalizer
Normalize and validate email addresses in bulk. Free online tool to clean and standardize your contact lists in the browser.
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Phone Parser
Parse and validate international phone numbers. Free online tool to check and format contact data in your browser. Supports phone, parser.
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JSON to Kotlin
Convert JSON to Kotlin data class definitions. Free online tool for Android developers in your browser. Supports json, kotlin.
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JSON to Swift
JSON to Swift: Convert JSON to Swift struct definitions with Codable. Free online developer tool — browser-based, no upload.
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.env File Editor
Edit and validate .env files with syntax checking, duplicate detection, and sensitive info highlighting — 100% local. Supports env, dotenv.
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ETA Calculator
Calculate estimated time of arrival based on speed and distance. Free online developer tool — browser-based, no upload. Supports eta, calculator.
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Recipe Share
Create reusable tool recipes and shareable workflow notes. Free online developer tool — browser-based, no upload. Supports recipe, share.
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JSON to Dart
Convert JSON to Dart class definitions with serialization. Free online developer tool — browser-based, no upload. Supports json, dart.
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HTTP Request Builder
Build and test HTTP requests with custom headers, methods, and body. Free online HTTP request builder for API testing. Supports http, request.
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String Obfuscator
Obfuscate strings for code protection and anti-tampering. Free online string obfuscator for app security in your browser.
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JSON to C++
Convert JSON to C++ class definitions with serialization. Free online developer tool — browser-based, no upload. Supports json, c++.
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Subnet Calculator
Calculate subnet masks, ranges, and broadcast addresses. Free online developer tool — browser-based, no upload. Supports subnet, calculator.
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Magic Format Detector
Magic Format Detector: Detect possible formats from pasted data signatures. Free online developer tool — browser-based, no upload.
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JSON to Elm
JSON to Elm: Convert JSON to Elm type definitions and decoders. Free online developer tool — browser-based, no upload. Supports json, elm.
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MCP Server Directory
Browse and search a directory of MCP servers instantly. Free online tool to discover and compare Model Context Protocol servers.
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JSON to Objective-C
Convert JSON to Objective-C interface and implementation. Free online developer tool — browser-based, no upload. Supports json, objectivec.
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Text String Array
Convert between plain strings and JSON arrays instantly. Free online tool for developers to transform list data in the browser.
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TOML to JSON Converter
Convert TOML configuration files to JSON format. Free online tool for developers to parse configs in your browser. Supports toml, json.
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JSON5 Validator
Validate and parse JSON5 files that support comments and trailing commas. Free online developer tool — browser-based, no upload.
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HTML to Text
Extract plain text from HTML by removing all tags. Free online tool to clean web content in your browser. Supports html, text.
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GRAPHQL Formatter
Format and beautify GraphQL queries with proper indentation. Free online GraphQL formatter for readable API code. Supports graphql, format.
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Base64 File Encoder
Encode files to Base64 strings for embedding in JSON and HTML. Free online file to Base64 converter for data URIs. Supports base64, file.
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HTML WYSIWYG Editor
Edit HTML visually with a rich text editor. See live WYSIWYG preview alongside the HTML source code — 100% local. Supports html, wysiwyg.
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Dark Mode CSS Generator
Generate a dark mode CSS override for any website. Input CSS or a URL and get ready-to-use dark theme variables — 100% local.
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Data Pipeline Editor
Build data transformation pipelines by dragging operations. Chain encode → decode → format → compress steps visually — a simplified CyberChef.
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API Sandbox & Tester
Lightweight API testing sandbox. Build HTTP requests with headers, body, and auth. Test endpoints without Postman — 100% local.
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Code to Beautiful Image
Turn your code into beautiful shareable images. Choose themes, window decorations, gradients, and export for social media — 100% local.
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JSON to TOML Converter
Convert JSON configuration to TOML format instantly. Free online tool for developers to manage config files in browser. Supports json, toml.
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Docker Compose Converter
Docker Compose Converter: Convert Docker run commands to docker-compose.yml. Free online developer tool — browser-based, no upload.
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HTML WYSIWYG Editor
Edit HTML visually with a live WYSIWYG preview editor. Free online HTML editor for building web pages in your browser. Supports html, wysiwyg.
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JWT Generator
Generate signed JWT tokens with custom payloads. Free online tool for auth testing in your browser. Supports jwt, generator.
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Basic Auth Generator
Basic Auth Generator: Generate Base64-encoded Basic Authentication headers. Free online developer tool — browser-based, no upload.
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ULID Generator
Generate ULIDs (Universally Unique Lexicographically Sortable Identifiers). Free online developer tool — browser-based, no upload.
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NATO Alphabet
Convert text to NATO phonetic alphabet instantly. Free online tool for clear verbal communication in your browser. Supports nato, alphabet.
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Timer
Set a countdown timer with custom alerts and notifications. Free online timer for productivity, cooking, and presentations.
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CyberChef Pipeline
Build a step-by-step encoding, decoding, and transform pipeline. Free online developer tool — browser-based, no upload. Supports cyberchef, pipeline.
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Hex Editor
Inspect and edit hexadecimal byte strings in the browser. Free online developer tool — browser-based, no upload. Supports hex, editor.
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WebSocket Tester
WebSocket Tester: Draft WebSocket connection, message, and event tests. Free online developer tool — browser-based, no upload.
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Cursor Alternative
Discover free alternatives to AI code editors with comparable features. Find the right online tool for your development workflow.
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JSON Cleaner
Clean and repair broken JSON by fixing syntax errors and removing invalid values. Free online developer tool — browser-based, no upload.
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SQL to JSON
Convert SQL CREATE TABLE and INSERT statements to JSON. Free online developer tool — browser-based, no upload. Supports sql, json.
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JSON to GET Parameters
Convert JSON objects to URL query parameters. Free online tool for API testing in your browser instantly. Supports json, url.
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Text Codec (Binary/Hex/Escape/Unicode)
Convert text to/from Binary, Hex, Escape encoding, and Unicode formats in one tool. Free online developer tool — browser-based, no upload.
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HTML Entities
Convert special characters to and from HTML entities. Free online tool to escape markup in your browser. Supports html, entities.
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URL Encode Decode
Encode and decode URL strings with percent-encoding for safe transmission. Free online URL encoder and decoder for web params.
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ASCII Converter
ASCII Converter: Convert text to ASCII decimal, hex or octal codes. Free online developer tool — browser-based, no upload.
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HTML Table Converter
Convert HTML tables to Markdown, CSV, or JSON. Paste HTML source or rich text — 100% local. Supports html, table. Extract support included.
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Number Base Visual Converter
Convert numbers between binary, octal, decimal, and hex with interactive bit-level visualization. Free online, no upload.
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JSON Tree Visualizer
Visualize nested JSON structures as an interactive, collapsible tree. Expand and collapse nodes to explore complex data hierarchies in your browser.
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Form Builder
Generate HTML forms from JSON Schema. Supports text, number, checkbox, select, and email fields with validation. Free online, no upload.
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Accessibility Contrast Checker
Check color contrast ratios for WCAG 2.1 AA and AAA compliance. Free online developer tool — browser-based, no upload. Supports accessibility, wcag.
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AI Prompt Optimizer
Enhance AI prompts with templates for role reinforcement, task decomposition, and chain-of-thought. Free online, no upload.
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Local Document Summarizer
Summarize documents locally using extractive text analysis without uploading. Free online developer tool — browser-based, no upload.
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Linux Terminal
Practice Linux commands in a simulated terminal environment with 14 built-in commands. Free online developer tool — browser-based, no upload.
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Subnet Calculator Pro
Advanced subnet calculator with CIDR, VLSM, binary visualization, and batch subnet planning. Free online, no upload. Ip support included.
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