CSV Viewer & Editor - Online Spreadsheet Tool
View and edit CSV data in a familiar table interface. Add/delete rows and columns, sort, and export. Fully local, no cloud sync.
UD5 Toolkit
Online ID3 Tag Viewer & Writer — Edit MP3 metadata right in your browser
Drop your MP3 file here or click to browse
Supports .mp3 files with ID3v1 & ID3v2 tags • Processed locally
View and edit CSV data in a familiar table interface. Add/delete rows and columns, sort, and export. Fully local, no cloud sync.
Enter total drive time or playlist length to figure out how many songs you need. Convert time to estimated tracks.
Enter a song title and artist to find lyrics using public APIs. Quick preview and copy. A lightweight tool for music lovers.
Display a dynamic list of keyboard shortcuts for the current browser and operating system. Filter by category. Keep it open for reference.
Paste a simple drum tab or select a pattern and hear it played. Learn drum set notation interactively.
Paste a URL and see the og:title, description, image, and twitter card that will be used when shared. No server needed.
Build a color palette for charts that works for protanopia, deuteranopia, and grayscale. Export as array.
Enter a URL and see a preview of how it will appear when shared on Facebook, Twitter, LinkedIn. Detect missing tags.
Remove clicks, pops, and crackle from audio recordings. Useful for digitizing vinyl. Threshold‑based local processing.
Upload a small file to see each byte as a block, color-coded by value. Visualize the structure of binary data. Client-side.
Take a screenshot of the current browser tab using Screen Capture API. Crop, annotate with text and arrows, and download as PNG. Local only.
Click a root key and chord type (Maj, min, 7th) to see the notes highlighted on a piano keyboard. Learn chords fast.
Enter drum diameter, depth, and material to find the shell's approximate fundamental note. For tuning reference.
Build a group of `<details>` elements where opening one closes others. Optional JavaScript. Copy the accessible snippet.
Build a horizontal scroll‑snap container with configurable snap‑type and alignment. Perfect for image galleries.
Drop any file to see its raw hexadecimal representation and ASCII side‑by‑side. Navigate with offset. Client‑side only.
Press any key and see the full KeyboardEvent object: key, code, keyCode, modifier status. Dev tool.
Apply rounded corners to an image and keep the background transparent. Save as PNG. Perfect for avatars and icons.
Extract the thumbnail image for any YouTube video by pasting its URL. Download in multiple resolutions (HD, SD). Simple and fast.
See how many tabs you have open and estimate memory usage based on navigator object. Fun productivity check.
Flip images vertically or horizontally, and rotate in 90° increments. Quick and simple editing right in the browser. Download the corrected image instantly.
Remove solid or similar backgrounds from images using color thresholding. No AI, just quick client-side canvas processing. Download as PNG.
Select knife type and see recommended sharpening angle. Visual guide with degree display. Perfect edge every time.
See the roving tabindex pattern in action. Use arrow keys to navigate a list. Copy the accessible JavaScript pattern.
Find the date of Easter Sunday for any given year. Learn about the computus algorithm. Simple and accurate.
Enter a password and see the estimated time it would take to crack using brute force at different speeds. Educational.
Draw a line along the horizon and the tool rotates the image to make it perfectly level. Small rotation. Canvas editing.
Enter room dimensions and number of walls to calculate needed 4x8 or 4x12 sheets, plus joint compound and tape estimate. Local tool.
Full-featured scientific calculator with trigonometric, logarithmic, and exponential functions. Clean interface and keyboard support. No installation required.
Classic solubility rules for ionic compounds in water. Determine if a salt is soluble or forms a precipitate. Static guide.