Assorted collection of SPAs:

• Random password generator
• Time Duration Calculator
• List Comparison tool
• JavaScript Array Sort tool
• One Time Password (OTP) token generator
• QR Code reader
• DNS over HTTPS client
• WebRTC Audio/Video Loopback Tester
• WebRTC Screen Recorder
• Apache .htaccess Tester
• Unicode Escape Sequence Converter
• Font file viewer
• SMS Backup viewer
  …for XML exports from the Android app: SMS Backup & Restore
• Markdown Table Converter
• SVG to PNG Converter
• PPTX to HTML Converter
• Crx Format Checker
• PyMuPDF web console
• yt-dlp web console
• FFmpeg.wasm Playground
• EmulatorJS: Arcade Console emulator
• Ruffle Player: Adobe Flash Player emulator
• Akamai Stream Validation and Player Test Page
• Image Obfuscation and Restoration using HTML5 Canvas
• Image Ruler
• AES symmetric encryption
• Incognito/Private Browser Window Detector
• QK CastTool for HomeSpot Auracast Broadcasters
• BIOS Password Recovery for Laptops
• Crossword Puzzles
  • PUZ to PDF Converter v1
  • PUZ to PDF Converter v2
• Bed Linen GSM Calculator

Userscripts:

• One Time Password (OTP) token generatorAdd a dropdown field with a list of private keys.
• Crossword Puzzles:
  • Internet Archive: NYT Crossword PuzzlesAdd a small "pencil" icon to the left of all AcrossLite (.puz) files, which opens the crossword puzzle file in the SPA in a new browser tab.
  • The Guardian: Crossword PuzzlesAdd an image to the top-left corner of pages that contain a crossword puzzle, which opens the crossword puzzle in the SPA in a new browser tab.