Tools
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Tool
JustHTML Playground - HTML5 Parser
— Test the JustHTML Python HTML5 parser directly in your browser with this interactive playground. Parse, query, and manipulate HTML using CSS selectors, pretty-print documents, extract text content, and convert HTML to Markdown—all running client-side with Pyodide. The playground supports multiple analysis modes including tree structure visualization and streaming event inspection for comprehensive HTML document exploration.
Tool
PDF Viewer
— View PDF files from any CORS-enabled URL with this interactive PDF viewer application. The viewer supports navigation between pages, adjustable zoom levels including auto-scaling, and maintains your viewing state through URL parameters. High-DPI display support ensures sharp text rendering across all devices, and the responsive design adapts seamlessly to mobile screens.
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Bugzilla Bug Viewer
— View Mozilla Bugzilla bug reports with a streamlined interface that displays bug details, comments, and change history in an organized timeline format. Enter a bug ID, URL, or Bugzilla link to retrieve comprehensive information including status, dependencies, keywords, and all activity related to the bug. The viewer automatically fetches and displays details about related bugs referenced in dependencies and history changes, making it easy to navigate connections between issues.
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PyPI Package Changelog
— Track changes across PyPI package versions by entering a package name and viewing detailed diffs between releases. This tool downloads and compares wheel files from PyPI, displaying file-by-file changes with syntax highlighting and support for custom version ranges. Share comparisons easily by copying diffs to clipboard or sharing the generated URL with version parameters.
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Bluesky Search
— Search Bluesky posts using advanced filters and options to organize results by latest or top engagement. This tool requires authentication with your Bluesky account credentials and supports filtering by date range, author, mentions, language, domain, URL, and hashtags. Results can be exported as formatted markdown for easy sharing and documentation.
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Tacopy Playground - Tail-Call Optimization for Python
— Explore how tail-recursive Python functions are transformed into optimized iterative code using the Tacopy library. Enter your recursive function in the input panel to see the automatically generated transformed version, which eliminates stack overflow risks and improves performance by converting tail calls into loops. Try the built-in examples to understand how different recursive patterns are optimized.
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Notes to Markdown
— Convert Apple Notes content to Markdown and HTML formats while preserving hyperlinks and formatting. Paste your notes into the text area to automatically generate both Markdown and HTML outputs, with a live preview of the rendered content. The tool parses RTF data from Apple Notes and provides copy buttons for easy transfer of the converted content.
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The Octave — A Sound Relationship
— Explore the mathematical and sonic relationship between frequencies through interactive demonstrations and a playable piano keyboard. This educational tool visualizes how an octave represents a 2:1 frequency ratio, allowing you to hear the harmonic connection between notes that sound identical yet exist at different pitches. Experiment with various base frequencies using the slider to understand how this fundamental musical principle scales across the entire spectrum.
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The New Yorker Style Converter
— Convert text to match The New Yorker's distinctive typographic style, featuring proper diaereses (such as "coöperate" and "naïve"), curly quotation marks, em dashes, and ellipses. Paste your text into the input field and watch the refined version appear instantly in the output area, which can be copied to your clipboard with a single click.
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Bluesky Quote Finder
— Search for quote posts on Bluesky by entering a post URL to discover all responses that quote the original post. The tool fetches and displays these quotes with options to sort by likes, recency, or oldest first, and provides direct links to view each quote on Bluesky or explore its thread context. A color-coded depth indicator helps visualize the conversation hierarchy.
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Link Extractor
— Extract hyperlinks from pasted web content and export them in multiple formats including HTML, Markdown, and plain text. The tool automatically detects and removes duplicate links while displaying each link's title and URL for easy verification. Copy extracted links in your preferred format with a single click.
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Text Diff Tool
— Compare two blocks of text to identify character-level differences between them. This tool uses a dynamic programming algorithm to compute the longest common subsequence and highlights removed text in red and added text in green for easy visualization of changes. The results are displayed character-by-character in a dedicated output section that clearly indicates what was deleted from the original text and what was inserted in the modified version.
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Wikipedia Wikitext Fetcher
— Retrieve the raw wikitext source code from Wikipedia articles by searching for a page title or pasting a direct article URL. The tool features autocomplete suggestions while typing search queries and allows you to easily copy the fetched wikitext to your clipboard for further editing or analysis. URL parameters are preserved, enabling you to share links that automatically load specific Wikipedia articles.
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CORS Fetch Tester
— Test HTTP requests directly in your browser and inspect the response headers and body that CORS restrictions allow you to access. This tool supports custom headers, request bodies in JSON or form-encoded formats, and includes a curl command importer for quickly setting up requests. The application uses shareable URL fragments to save your request configuration for later use.
Tool
XML Well-Formedness Validator
— Check XML documents for well-formedness by pasting content into the input area and clicking the validate button. The tool parses the XML and displays any syntax errors with precise line and column information, highlighting the problematic line in the code view below.
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Emoji Identifier
— Extract and identify all emojis from text by pasting or typing into the input field, and instantly view their names and Unicode codepoint values. The tool uses a comprehensive emoji detection regex pattern combined with a Unicode emoji dataset to recognize a wide variety of emoji characters, including skin tone variants and zero-width joiner sequences. Results are displayed in real-time, showing each unique emoji found along with its standardized name and corresponding Unicode representation.
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Badge Interactive REPL
— Interact with a MicroPython device via the Web Serial API to execute Python commands in real-time through a browser-based REPL interface. This tool enables direct communication with compatible microcontroller boards, allowing users to run Python code, query system information, and manage files without requiring terminal software or drivers. The interface provides quick-access buttons for common operations like listing files, checking CPU frequency, and monitoring available memory.
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GitHub GraphQL Explorer
— Explore GitHub's GraphQL API using an interactive query interface that requires authentication via a personal access token. Enter your GitHub token to connect and start writing, executing, and testing GraphQL queries against GitHub's data in real-time. The explorer provides syntax highlighting, query validation, and response inspection capabilities within an embedded GraphiQL environment.
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GitHub Rate Limit Checker
— Monitor your GitHub API usage and remaining rate limits with this authentication-based checker. After authenticating with your GitHub account, the tool displays detailed information about your API quotas across different resource types, including remaining calls, reset times, and visual progress indicators. The interface shows critical warnings when your limits are running low, helping you manage your API consumption effectively.
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Terminal to HTML
— Convert terminal output into shareable HTML documents with support for colored text formatting. Paste terminal output in RTF, HTML, or plain text format, and the tool instantly generates clean HTML code ready for preview or export. Save your conversions as GitHub Gists for easy sharing and collaboration.
Tool
Query String Stripper
— Remove query parameters and tracking data from URLs with this Query String Stripper tool. Paste any URL to instantly extract the base address by stripping away everything after the question mark, then copy the cleaned result to your clipboard with a single click. This utility is helpful for sharing clean URLs, removing analytics parameters, or simplifying web addresses for documentation purposes.
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OpenAI Prompt Caching Playground
— Explore OpenAI's prompt caching feature by testing different prompt structures and observing cache hit rates across multiple requests. This interactive playground lets you compose system instructions, document context, and user questions, then send them to the Chat Completions or Responses API to track how cached tokens reduce costs and improve performance.
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Text Indentation Tool
— Adjust indentation levels in your text with this tool that offers multiple formatting options. Add or remove spaces from the beginning of each line, strip all leading whitespace, eliminate trailing spaces, and apply or remove quote markers (>) for formatted text. Copy the processed result directly to your clipboard with a single click.
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