Piano Sight Reading Trainer - Online Random Note Staff
A random note appears on the grand staff; click the correct piano key. Improve sheet music reading. Multiple clefs.
UD5 Toolkit
A random note appears on the grand staff; click the correct piano key. Improve sheet music reading. Multiple clefs.
Load a WAV file and see its real-time oscilloscope trace and frequency spectrum. Zoom and pan. Pure frontend.
Apply a fisheye or barrel distortion to your photo with adjustable strength. Simulate extreme wide angle.
Enumerate all fonts installed on your device and see a real‑time preview. Useful for design tools. Permission required.
Enter a date and location (or use GPS) to see exact golden hour and blue hour times for perfect natural light.
Paste a Base64 encoded font string and generate the complete @font‑face CSS rule. Inline small fonts easily.
Select a tool (VS Code, Figma, etc.) and get random shortcut prompts. Press the keys to practice.
Practice mental arithmetic with customizable operators and digit count. Timed rounds, score tracking. Works offline. Improve your brain speed.
A minimalist text notepad that auto-saves to your browser's localStorage. No ads, no signup, no data leaves your device. Perfect for quick ideas.
Write notes that are encrypted in your browser before saving to localStorage. Only accessible with your passphrase.
Random letters appear; you must type the correct code word quickly. Beat your high score. Learn the NATO alphabet.
Flashcards for learning Braille. See the dot pattern and type the letter. Track your speed and accuracy. Accessibility education.
Connect your MIDI keyboard and see pressed notes visually on a piano roll. Check velocity, channel, and aftertouch. No DAW needed.
Solve random arithmetic problems under a time limit. Track your score and improve mental calculation. No data collected.
A sequence of digits flashes for a few seconds. Type it back. Increase length. Improve your working memory.
Fill in a pre‑designed meeting notes template and copy as formatted HTML or plain text. Quick documentation.
Practice sending Morse code using a virtual straight key. Visual feedback and audio tone. Learn timing and proper fist.
See a random letter/number and tap the Morse sequence. Instant feedback. Practice the full international Morse alphabet.
Write and store encrypted daily journal entries directly in your browser's localStorage. Export as TXT. No sign-up, fully private.