About MusicTool
A free tuner, metronome and practice tools that run in your browser.
kmra.dev is a family of small, focused tools for everyday files: images, PDFs, video, audio, QR codes, text in pictures, code, colours, calculations and music. Each app lives on its own subdomain and does its work in your browser, so it's fast and your files stay private.
Private by design
Everything runs on your device, with no accounts. The tool comes to your file.
Only what works
A tool appears here when it's finished, not before.
Fast and free
No queues, no watermarks, no limits we set.
Simple first
Two or three controls by default. Advanced when you need it.
Who makes it
kmra.dev is built and run by K M Rejowan Ahmmed. Ideas, bugs or a tool you'd like to see? Get in touch.