Tools
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Tool
ARES Phonetic Alphabet Converter
— Convert text to NATO phonetic alphabet equivalents for clear communication in radio, military, and aviation contexts. Enter any combination of letters and numbers, then click the convert button to display the phonetic representation with each character separated by spaces. Spaces in the original text are marked as "(SPACE)" in the output.
Tool
Navigation Bar with Text-Wrap Balance
— Explore how the CSS `text-wrap: balance` property affects navigation layout and text distribution across multiple lines. This interactive demonstration allows you to toggle the text-wrap balance feature on and off while adjusting the number of visible navigation items to see how the browser distributes text more evenly across lines. Use the slider and checkbox controls to observe the differences in how links wrap and align within the constrained navigation container.
Tool
HTML Entity Escaper
— Convert between special characters and their HTML entity representations with this bidirectional encoding tool. Select between Escape mode to convert characters like `<`, `>`, `&`, and quotes into their corresponding HTML entities, or Unescape mode to decode HTML entities back into readable characters. The tool supports named entities, decimal numeric references, and hexadecimal numeric references, with real-time conversion displayed in the output field.
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QR Code Decoder
— Decode QR codes from images or your device's camera with this interactive web application. Upload an image by dragging and dropping, clicking to select a file, or pasting from your clipboard, and the decoder will extract the encoded data instantly. Switch to webcam mode for real-time scanning with support for multiple cameras and pinch-to-zoom functionality on touch devices.
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OpenAI Audio
— Record audio through your microphone and send it to OpenAI's GPT-4o audio model along with a text prompt to receive AI-generated responses. The tool converts your recorded audio to WAV format, calculates token usage and associated costs for both text and audio inputs, and displays the API response in both formatted and raw JSON views. Your API key is securely stored locally in your browser, and you can download the recorded audio file for later use.
Tool
Extract URLs
— Extract URLs from copied web page content by pasting HTML into the input area, which automatically identifies and displays all hyperlinks found in the pasted material. The tool filters for valid HTTP links and provides a consolidated list in the output textarea, making it easy to copy all extracted URLs to your clipboard with a single button click.
Tool
Pelican Sightings Query Tool
— Query pelican sighting records from Half Moon Bay using SQL commands against an in-browser SQLite database. The tool loads sample data containing observations of various pelican species across local beaches with dates, locations, and counts. Enter any valid SQL query in the textarea and execute it to retrieve and view the results in a formatted table.
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Jina Reader
— Convert web pages to structured content using the Jina Reader API, with support for multiple output formats including markdown, HTML, and text. The interface allows you to fetch and preview page content while optionally running AI-powered analysis through Claude to generate summaries, extract quotes, and identify key ideas from the retrieved material.
Tool
Improved Interactive CSS Grid Layout with Symmetric Animation
— Explore an interactive CSS grid layout that demonstrates dynamic element expansion with smooth animations. Click the green cell labeled "1x2" to trigger a symmetric animation that expands the element to fill the entire grid container, then click again to animate it back to its original position. The layout combines CSS Grid positioning with JavaScript event handling to create a polished visual effect that smoothly transitions between states.
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Event Planner
— Plan events with timezone-aware scheduling and countdown tracking. This application allows you to input event details including title, description, location, date, and time across different US timezones, then automatically calculates the time remaining until the event and generates a shareable Google Calendar link. The tool displays all event information in a formatted summary and provides a convenient way to add the event directly to your Google Calendar account.
Tool
Image to SVG
— Convert raster images to scalable vector graphics using automated tracing technology. Upload a JPG or PNG image by dragging it onto the drop zone or clicking to browse, and the application will generate an SVG representation that can be viewed and copied. The conversion process uses imagetracerjs to intelligently trace image edges and create vector paths suitable for scaling to any size without quality loss.
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SVG to JPEG/PNG
— Convert SVG images to JPEG or PNG format with customizable dimensions, padding, and background colors. The tool allows you to paste SVG code directly, upload SVG files via drag-and-drop, or load SVG images from URLs, then instantly previews the converted result and provides download and base64 embedding options. URL hashes preserve your work for easy sharing and recovery.
Tool
MapLibre GL + OpenFreeMap demo
— Explore an interactive map of San Francisco rendered with MapLibre GL and OpenFreeMap tiles, displaying 1000 randomly distributed markers across the city. The demo showcases three different approaches for rendering large numbers of points—scaled markers, custom HTML elements, and GeoJSON circle layers—with the map automatically adjusted to fit all markers in view. Users can interact with the tilted 3D map to navigate and explore the marker distribution across the San Francisco area.
Tool
User Agent
— Display your browser's user agent string, which contains information about your web browser, operating system, and device. This identifier is sent with every HTTP request your browser makes and helps websites understand how to optimize their content for your specific platform and browser version.
Tool
Markdown and Math Live Renderer
— Render Markdown text with integrated LaTeX mathematical equations in real-time as you type. This tool converts your input into formatted HTML output while simultaneously displaying a live preview with properly rendered math expressions using KaTeX. You can view the generated HTML code and copy it to your clipboard for use in other projects.
Tool
GitHub API File/Image Writer
— Upload files and images to GitHub repositories using the GitHub API. This tool accepts either text content or image files and commits them to a specified repository path with proper authentication via personal access tokens. The interface automatically adapts to show relevant input fields based on whether you're uploading text or an image file.
Tool
Image Token Calculator
— Calculate the token cost for images used in API requests by uploading or dragging an image file into the tool. The calculator analyzes the image dimensions and divides them into 224-pixel tiles, multiplying the total tile count by 1,000 to determine the token expense. This helps estimate costs when working with vision-based APIs that charge per image token.
Tool
YouTube Thumbnail Viewer
— View YouTube video thumbnails in multiple resolutions by entering a video URL or ID. This tool extracts and displays all available thumbnail formats from YouTube's image server, allowing you to preview different quality options and copy direct image links. Click on any thumbnail to expand it for a closer look, and use the copy button to save the image URL to your clipboard.
Tool
Pomodoro Timer
— Track productivity sessions with this Pomodoro timer application that manages timed work intervals with customizable durations. Set a goal for each session, choose from preset time intervals ranging from 5 to 60 minutes, and pause or resume as needed while the timer counts down. All session data including start times, end times, and pause history is automatically saved and displayed in a detailed log table, with the ability to export the data as JSON for further analysis or record-keeping.
Tool
Gemini Chat App
— Chat with Google's Gemini AI models directly in your browser using this interactive chat application. Simply enter your Gemini API key (stored locally for convenience) and select from multiple available models including Gemini 2.5 Flash, Pro, and various other versions to power your conversations. The app displays real-time streaming responses, tracks API usage metrics, and measures response duration to help you monitor your interactions.
Tool
Gemini API Image Bounding Box Visualization
— Analyze images using the Google Gemini API and visualize detected objects as bounding boxes or points overlaid on the original image with coordinate grid lines. The tool supports multiple Gemini model versions and can extract either bounding box coordinates in normalized format or point locations with labels, displaying the results alongside a detailed visualization canvas. Store your API key locally for convenient access across multiple sessions.
Tool
TIFF Orientation Reader
— Read TIFF orientation metadata from JPEG images by uploading or dragging files into the drop zone. The tool parses the EXIF data embedded in the image file to extract the orientation tag, which indicates how the image should be displayed (normal, rotated 90° clockwise, rotated 180°, or rotated 270° clockwise). Debug information shows the file analysis process, including EXIF location, endianness detection, and TIFF header validation.
Tool
Audio Spectrum Visualizer
— Visualize real-time audio frequency data from your microphone as an animated spectrum display. This application uses the Web Audio API to capture microphone input, analyze frequencies using FFT (Fast Fourier Transform), and render dynamic bars that respond to sound levels across the frequency spectrum. Grant microphone permissions when prompted to begin the visualization.
Tool
Image resize, crop, and quality comparison
— Compare images at different sizes and quality levels by uploading a photo, defining a crop area, and generating multiple preview versions with varying dimensions and compression settings. The tool displays file sizes for each variant and allows interactive toggling between normal and full-width viewing modes, as well as direct downloads. Transparency detection automatically reveals a background color picker when needed for images with alpha channels.
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EXIF Data Viewer
— Extract and view EXIF metadata from image files, including GPS coordinates and other embedded image data. This tool allows you to upload an image and instantly retrieve detailed information such as geolocation data, camera settings, and timestamps stored within the file. The viewer displays GPS coordinates in decimal format when available and presents all extracted metadata in a structured, readable format.
Tool
Box shadow CSS generator
— Generate custom CSS box-shadow effects with interactive controls and real-time preview. Adjust horizontal and vertical offsets, blur radius, spread radius, color, and opacity using intuitive sliders and color picker to visualize shadow changes instantly. Copy the generated CSS code directly to your clipboard for immediate use in your stylesheets.
Tool
Timezone Meeting Planner
— Plan meetings across multiple time zones by selecting two locations and viewing their local times side-by-side. The comparison table displays 48 consecutive hours of UTC times with corresponding local times for each timezone, making it easy to identify overlapping working hours. Your timezone selections are automatically saved in the URL for convenient sharing and bookmarking.
Tool
Chrome LanguageModel Playground
— Interact with Chrome's built-in language model API through this web-based playground interface. The application allows users to check model availability, download the model if needed, and execute text prompts to generate responses directly in the browser. A persistent history feature maintains records of previous prompts and responses for easy reference.
Tool
Compare PDFs
— Compare two PDF documents side-by-side to identify differences between them. Upload or drag and drop two PDF files to view their pages rendered as images, with a third panel highlighting any pixel-level differences in red. This tool is useful for detecting changes between document versions, comparing drafts, or verifying document modifications.
Tool
Language Model Elo Ratings
— Compare Elo ratings across different language models and dates using this interactive animated bar chart. Load your own JSON data with model names, dates, and Elo scores, then watch the rankings evolve over time with customizable animation speed. The visualization displays the top 20 models at each time point, making it easy to track performance trends and competitive dynamics in the AI landscape.
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