Your browser and your files

Playproof works on your music where it is, inside your browser. So the browser asks your permission now and then, and has a few rules of its own.

Which browser to use

Use Chrome, Edge or Brave on a computer. They let Playproof work with a folder you choose, which makes everything easier. Firefox and Safari work too, with a few differences:

	Chrome, Edge, Brave, Opera	Firefox, Safari
All the tools	Yes	Yes, but you drop files onto the page instead of choosing a folder
Remembers your music folder	Yes	No
Writes straight onto a USB stick	Yes	No: you get a ZIP file to unpack onto the stick
Stick check	Yes, and it can remove the hidden files a Mac leaves on a stick	Yes, but it may not see hidden files

Phones and tablets can't do this, so use a computer.

One catch: Chrome can't play AIFF or Apple Lossless (ALAC) files. Playproof can still copy them to a stick, but to convert or check them, use Safari. Playproof tells you when this happens.

When the browser asks

When you choose a folder, the browser asks if Playproof may view the files. When you save a playlist or write to a stick, it asks if Playproof may edit files there. If you say no, nothing happens.

Next time you visit, Chrome asks once more before Playproof can open the folder again. That's one click. Newer versions of Chrome offer “Allow on every visit” so you don't have to.

Folders the browser won't open

If you see “can't open this folder because it contains system files”, it's the browser protecting your computer. It won't open:

Desktop, Documents, Downloads or your user folder themselves. Folders inside them are fine. If your music is loose in Downloads, move it into a folder of its own and choose that.
System folders, like AppData on Windows or Library on a Mac. VirtualDJ often keeps its database there, so for the library map you can drag the file onto the page instead. Dragging always works.

What Playproof remembers

So it doesn't do the same work twice, Playproof saves some results in your browser on this computer:

what it found out about each track: tempo, key, energy and quality;
fingerprints of tracks you've made tracklists with, so the next one is faster;
track names you typed in yourself;
the folders you allowed, and your gig checklist;
your licence key, if you have one.

It never saves your music, and none of this leaves your computer. You can clear it in Settings in the app. A private window forgets everything when you close it.

If it feels slow

Music on a network drive is slower to read than music on your own computer. A big library can take a minute the first time.
Close other heavy tabs if your computer struggles.
Converting to MP3 is the slowest job. A big library can take hours. AIFF and WAV are much faster.