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DeveloperAPI Endpoint TesterTest any API endpoint directly from your browser. Our free online API tester lets you make GET, POST, PUT, PATCH, and DELETE requests, customize headers, and view raw responses instantly. Perfect for developers and testers.DeveloperAPI Response MockerDesign realistic API responses without a backend. Features custom status codes, header kits, latency simulation, and instant JSON generation for frontend developers.DeveloperBase64 Encoder/DecoderEncode and decode Base64 safely in your browser. Convert text to Base64 (and back), learn about UTF‑8, URL‑safe Base64, padding, and build data URIs for images or inline assets.DeveloperCode Screenshot GeneratorTransform your source code into stunning, professional screenshots. Choose from multiple editor themes, vibrant gradients, and macOS-style frames. Perfect for Twitter, LinkedIn, and blogs.DeveloperCron Expression BuilderCreate and test cron expressions visually. Generate human-readable schedules, preview upcoming run times, and use presets for Linux crontab and automation workflows.DeveloperCSS to LESS ConverterConvert CSS to LESS with intelligent preprocessing, variable extraction, nested rule optimization, and comprehensive mixin support. Perfect for modernizing legacy CSS and improving maintainability.Built for everyday work
Create your optimal workflow from 88 small tools, sorted by the job they do
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Latest post
How I Saved Tons of GitHub Copilot Premium Requests
Learn why Copilot premium requests get consumed by confirmations, and how an MCP human-in-the-loop workflow keeps sessions alive to save your monthly quota.
GitHub CopilotMCPVS CodeProductivity
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brain games for a break
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DeveloperCalculatorTextImage & MediaProductivity
Every tool organized in a logical and convenient way
changeblogger.orgDeveloperAPI Endpoint TesterAPI Response MockerCalculatorAge CalculatorDate CalculatorTextAlphabet Counter & Letter Count ToolConvert Text to UppercaseImage & MediaColor Palette GeneratorEXIF Viewer & Remover
Every tool, on one wall
All 88 of them. Scroll and the board slides past. Click any card to open it.
ProductivityAdvanced Clipboard Manager & Download ToolPowerful clipboard manager to paste, organize, and download multiple text, images, URLs, and code snippets with unique file IDs. Fully client-side with persistent storage, batch operations, search, and filtering capabilities.CalculatorAge CalculatorCalculate exact age from a birth date to any date. See years, months, days, and total days/weeks/hours/minutes; perfect for forms, eligibility, and planning.AIAI Acronym FinderStruggling with industry jargon? Our AI-powered Acronym Finder provides instant, context-aware definitions for any acronym or initialism. Get clear explanations and usage examples in seconds.AIAI Image EditorEasily edit your images using our intuitive AI-powered tool. Upload, edit, undo changes, review previous edits, and download without storing data on our servers. Try now at changeblogger.org.AIAI Mermaid Chart GeneratorDescribe your chart in plain English to get valid Mermaid code. Preview instantly and export SVG/PNG. Also paste Mermaid to get explanations or auto‑fix common syntax errors.TextAlphabet Counter & Letter Count ToolLooking an easy way to count the number of characters in your text? Look no further just a few clicks, you can quickly find out the character count of any text.DeveloperAPI Endpoint TesterTest any API endpoint directly from your browser. Our free online API tester lets you make GET, POST, PUT, PATCH, and DELETE requests, customize headers, and view raw responses instantly. Perfect for developers and testers.DeveloperAPI Response MockerDesign realistic API responses without a backend. Features custom status codes, header kits, latency simulation, and instant JSON generation for frontend developers.DeveloperBase64 Encoder/DecoderEncode and decode Base64 safely in your browser. Convert text to Base64 (and back), learn about UTF‑8, URL‑safe Base64, padding, and build data URIs for images or inline assets.ProductivityBill OrganizerUpload, parse, and organize bills securely. Search, categorize, and track amounts, bill dates, due dates, and attachments in one place.Web & SEOCanonical Tag CheckerProfessional canonical tag analyzer to identify and fix duplicate content issues. Check for missing canonical tags, incorrect implementations, conflicting signals, self-referencing canonicals, and HTTPS/HTTP mismatches to improve your SEO performance.DeveloperCode Screenshot GeneratorTransform your source code into stunning, professional screenshots. Choose from multiple editor themes, vibrant gradients, and macOS-style frames. Perfect for Twitter, LinkedIn, and blogs.Image & MediaColor Palette GeneratorCreate professional color schemes in seconds. Extract palettes from images or generate them from hex codes with instant export to CSS, Tailwind, and Figma.TextConvert Text to UppercaseLooking for a text case changer tool to convert your text to uppercase? Look no further, with just a few clicks, you can convert text to uppercase.DeveloperCron Expression BuilderCreate and test cron expressions visually. Generate human-readable schedules, preview upcoming run times, and use presets for Linux crontab and automation workflows.DeveloperCSS to LESS ConverterConvert CSS to LESS with intelligent preprocessing, variable extraction, nested rule optimization, and comprehensive mixin support. Perfect for modernizing legacy CSS and improving maintainability.CalculatorDate CalculatorAdd or subtract years, months, and days from a date, or find the exact difference between two dates with totals (days, weeks, hours, minutes).CalculatorDebt Payoff CalculatorPlan your debt reduction strategy to improve borrowing power. Compare debt snowball vs avalanche methods, calculate payoff timelines, and see how eliminating debt impacts your financial future.DeveloperDifference CheckerFree difference checker to compare two texts online. Our text comparison tool highlights additions and deletions, making it easy to spot changes between file versions, code, or documents.NetworkDNS Lookup ToolPerform comprehensive DNS lookups to retrieve various DNS record types including A, AAAA, MX, TXT, NS, and more for any domain name.CalculatorEMI CalculatorCalculate EMI for loans with interest rates and tenure.Image & MediaEXIF Viewer & RemoverView and remove EXIF data from images for privacy.Image & MediaFavicon GeneratorCreate a complete set of favicons for your website from a single image. Generate sizes for all modern browsers and devices, including PNG icons and Apple Touch Icons, and download them in a convenient ZIP file.AIFree Image to Text ConverterProfessional-grade OCR tool to extract text from images instantly. Convert JPG, PNG, and other formats to editable text with 95%+ accuracy. Browser-based, secure, and free to use.Image & MediaGradient GeneratorCreate CSS gradients, preview color transitions, and copy the CSS for your design.NetworkHostname to IP ConverterConvert hostnames to IP addresses and vice versa with our advanced network utility. Features include bulk conversion, DNS cache checking, reverse lookup, and comprehensive network diagnostics.DeveloperHTML to Markdown ConverterEffortlessly convert your HTML code into clean, readable Markdown with our free online tool. Perfect for developers, writers, and content managers.DeveloperHTTP Header AnalyzerScan your website headers for security vulnerabilities, caching efficiency, and information leakage. Get a professional grade (A+ to F) and actionable advice to harden your server.NetworkHTTP Redirect CheckerTrace all redirects (301, 302, etc.) for a URL in one click. See each hop and HTTP status code to debug SEO and link issues.Image & MediaImage EditorTransform your images with powerful editing tools. Simple, fast, and secure image editing with brightness, contrast, saturation controls, filters, and format conversion.Image & MediaImage Format ConverterConvert images between different formats like JPG, PNG, WebP, and more.Image & MediaImage to PDF ConverterEasily convert your JPG, PNG, GIF, BMP, and TIFF images into a single, high-quality PDF document. Perfect for creating portfolios, reports, or archives. Secure, fast, and entirely free.NetworkIP CheckerShow your public IP address, approximate location, ISP, and timezone using a browser-side IP lookup.DeveloperJSON ConverterConvert JSON data to XML, CSV, TSV, and YAML formats with customizable options.DeveloperJSON MinifierCompress JSON files by removing unnecessary whitespace and formatting. Perfect for optimizing file sizes for production and faster data transmission.DeveloperJSON PrettifierFormat and beautify JSON data with customizable indentation. Perfect for making complex JSON structures readable and well-organized.DeveloperJSON StringifierConvert JavaScript objects, arrays, and values to JSON strings with custom formatting, filtering, and indentation options.DeveloperJSON Syntax HighlighterHighlight JSON syntax with color-coded display for better readability and debugging. Features dark/light themes, copy functionality, and error detection.DeveloperJSON to String ConverterConvert JSON objects to strings with options to preserve or escape special characters. Perfect for developers working with APIs, configuration files, and data serialization.DeveloperJSON ValidatorValidate JSON syntax, escape/unescape special characters, and analyze JSON structure with detailed statistics and error reporting.DeveloperJWT & JWE DebuggerPaste a token to instantly decode header and payload, verify signatures against secrets, PEM/JWK, or JWKS URL, validate claims, and re‑encode tokens for testing. Supports HS256, RS256, ES256, PS256, and EdDSA.ProductivityKanban BoardFeature-rich Kanban board with drag-and-drop, multiple boards, priorities, labels, due dates, checklists, and local storage persistence. Organize your tasks visually with columns, filters, and keyboard shortcuts.Web & SEOLink Preview GeneratorGenerate and inspect rich preview cards for any URL. Extract Open Graph/Twitter metadata and see how links will appear on social media.CalculatorLoan Affordability CalculatorDetermine how much loan you can afford based on your income and expenses. Calculate maximum loan amount considering debt-to-income ratio, monthly obligations, and lending criteria.DeveloperMarkdown Table GeneratorCreate clean, aligned Markdown tables visually. Features spreadsheet-like editing, CSV/JSON imports, and instant export to Markdown, HTML, and CSV for GitHub and documentation.Image & MediaMic TestFree online mic test to check your microphone instantly. Test audio levels, microphone quality, and noise detection for voice calls, recordings, and streaming.SecurityPassword Strength Checker & Generator ToolTest the strength of your passwords with our advanced checker and create new, highly secure passwords with our generator. Stay safe online.GamesPlay Tambola TicketPlay tambola with your shared ticket online. Click to mark called numbers, track your progress, and compete for Early Five, Lines, and Full House. Share tickets with friends for multiplayer fun.ProductivityProfit and Expense TrackerEasily track your income and expenses to generate a clear Profit and Loss (P&L) statement. Ideal for freelancers, side hustles, and small businesses.ProductivityQR Code GeneratorCreate custom QR codes for URLs, WiFi, Contact info, Email, SMS, Calendar events, and more. Free, fast, and customizable QR code generator.ProductivityQR Code ScannerScan QR codes instantly using your camera or upload images. Supports URLs, WiFi, vCards, payments, and more with secure, privacy-focused processing.DeveloperRandom Binary GeneratorGenerate random binary numbers with custom bit lengths, patterns, and multiple output formats. Perfect for programming, computer science, and digital electronics applications.DeveloperRandom CSV GeneratorGenerate random CSV data with custom columns, data types, and export options. Create test data, sample datasets, and structured information for analysis and development.DeveloperRandom Date GeneratorGenerate random dates with custom ranges, formats, and filtering options. Perfect for testing date-based applications, creating sample data, and scheduling scenarios.NetworkRandom IP GeneratorGenerate random IP addresses with IPv4/IPv6 support, subnet generation, CIDR notation, and validation. Perfect for network testing, development, and security assessments.DeveloperRandom JSON GeneratorGenerate random JSON data from schemas with our advanced tool. Create structured data, arrays, objects, and validate your JSON schemas. Perfect for testing and development.NetworkRandom MAC GeneratorGenerate random MAC addresses with vendor prefixes, multiple formats, and various types. Perfect for network testing, virtualization, and security assessments.CalculatorRandom Number GeneratorGenerate random numbers with decimal support, multiple bases, exclusions, and advanced features. Perfect for testing, gaming, statistics, and programming applications.SecurityRandom Password GeneratorGenerate strong, secure passwords with our advanced password generator. Features include character set selection, strength meter, batch generation, and customizable options.TextRandom String GeneratorGenerate random strings with custom patterns, character sets, and formatting options. Perfect for creating test data, usernames, codes, and structured text.DeveloperRandom Time GeneratorGenerate random times with custom ranges, formats, and filtering options. Perfect for scheduling, testing time-based applications, and creating sample timestamps.DeveloperRandom TSV GeneratorGenerate random TSV data with custom columns and data types. Create structured tab-separated files perfect for data analysis, spreadsheet applications, and simple data exchange.DeveloperRandom XML GeneratorGenerate random XML data with our flexible template system. Create structured XML documents, handle arrays, and export formatted XML files. Perfect for testing and development.DeveloperRandom YAML GeneratorGenerate random YAML data with our flexible template system. Create structured configuration files, handle arrays and objects, and export formatted YAML files. Perfect for testing and development.DeveloperRegex PlaygroundBuild, test, and debug regular expressions in real-time. Features live match highlighting, capture group visualization, and a comprehensive pattern library for JavaScript, Python, and more.TextReverse TextReverse pasted text for testing, puzzles, sample data, and quick formatting checks.CalculatorSavings CalculatorPlan your emergency fund and build financial security alongside debt payoff. Calculate savings goals, track progress, and develop sustainable saving habits for long-term financial health.DeveloperSchema ConverterTransform JSON instantly into TypeScript interfaces, Zod schemas, JSON Schema, or GraphQL types. Features recursive type inference and professional customization options.TextSentence CaseConvert pasted text to sentence-style capitalization for drafts, notes, and copied content.TextShuffle TextRandomize characters in pasted text for quick test data, games, and draft experiments.CalculatorSIP CalculatorCalculate returns on Systematic Investment Plans.Web & SEOSitemap Checker & Analyzer ToolFree online sitemap checker tool to analyze XML sitemaps. Check sitemap validity, view URL structure, priorities, change frequencies, and get detailed SEO insights for better search engine optimization.CalculatorSort NumbersQuickly sort lists of numbers ascending or descending with our free online tool. Supports commas, spaces, and custom separators.DeveloperSQL FormatterFormat and beautify SQL queries with intelligent indentation, syntax highlighting, keyword capitalization, and comprehensive database support. Perfect for database development, code reviews, and documentation.Image & MediaSVG Editor & OptimizerEdit, clean, and optimize SVG files in real-time. Reduce file size, remove metadata, and preview vector changes instantly for faster web performance.CalculatorTambola Number CallingQuickly generate random numbers for any range (e.g., 1 to 90 for Tambola). Features automatic number calling with sound, state saving, and fully customizable limits for Housie games.GamesTambola Ticket GeneratorGenerate authentic tambola (housie/bingo) tickets with traditional 3x9 grid format, multiple ticket types, validation, and export options. Perfect for events, parties, and gaming.CalculatorTemperature ConverterConvert between Celsius, Fahrenheit, Kelvin, Rankine, and Réaumur.DeveloperTest MCP ServerExplore, test, and debug Model Context Protocol (MCP) servers with our advanced GUI. Discover available tools, execute methods with custom JSON arguments, and monitor real-time logs.TextText to LowercaseConvert pasted text to lowercase for cleanup, normalization, and quick formatting.TextText to Toggle CaseConvert text to alternating upper and lowercase letters.DeveloperURL ParserParse and analyze URLs to extract components.DeveloperUser-Agent ViewerAnalyze and view detailed information about your browser's user agent string, including browser type, version, operating system, and device information.DeveloperUUID/GUID GeneratorGenerate universally unique identifiers (UUIDs), also known as globally unique identifiers (GUIDs), using different standard versions. This tool is essential for creating unique IDs for database records, entities, and distributed systems.Image & MediaWebcam TestCheck camera online with our free webcam test tool. Test your webcam resolution, frame rate, and video quality instantly in your browser.TextWhite Space RemoverRemove spaces, tabs, and line breaks from pasted text in one browser-based step.TextWord CapitalizerCapitalize the first letter of each space-separated word in pasted text.TextWord CounterCount words, characters, and unique words in pasted text directly in your browser.
From the blog
Guides written after the work, not before it
How I Saved Tons of GitHub Copilot Premium Requests
Learn why Copilot premium requests get consumed by confirmations, and how an MCP human-in-the-loop workflow keeps sessions alive to save your monthly quota.
GitHub CopilotMCPVS CodeProductivity
Docker Top 50 Must-Know Commands
A comprehensive reference of the 50 most essential Docker commands for container management. From basics to advanced networking, security, and cleanup, this guide covers everything you need to ship apps faster and troubleshoot containers effectively.
DockerDocker Commands
Run a Stable Diffusion image model in Google Colab
A practical walkthrough for experimenting with a Stable Diffusion-style image model in Google Colab, with notes on limits, safety, and third-party terms.
ai image generationstable diffusiongoogle colab
Parent-child communication in Vue.js
Parent-child communication is an important aspect of any Vue.js application, and with the help of props, events, and the $refs object, it can be achieved with ease. Whether you're passing data from parent to child, or accessing a child component's methods and properties, these tools will help you communicate effectively and create a smooth, well-oiled machine of an application.
Vue.jsParent-ChildPropsEvents