A student sends you a .gp5 file. Or you find a tab online, download it, and discover it needs software you do not have installed. Guitar Pro files are the standard format for tablature, but the format has always been tied to a desktop application.
This guide covers what these files actually are, how to open them in a browser, and what you can do with them once they are rendered.
What Guitar Pro files are
Guitar Pro files store far more than a picture of a tab. They contain the notes, rhythms, tunings, tempo markings and often several instrument tracks, stored as structured data. That is why a tab in this format can be played back, transposed and edited, while a scanned PDF or a screenshot cannot.
- .gp3, .gp4, .gp5: the older binary formats, still extremely common on tab sites.
- .gpx and .gp: the newer formats used by recent Guitar Pro versions.
- MusicXML (.xml, .mxl): an open interchange format that most notation software can export. Useful when you want a file that is not tied to one vendor.
Opening them in the browser
Exerzisor renders these files directly in the browser using alphaTab, an open-source rendering engine for guitar tablature and standard notation. You upload the file and it becomes an interactive score — no desktop install, and nothing for your students to buy.
Because the file is rendered from its underlying data rather than displayed as an image, the score stays readable at any zoom level and on any screen size. This is the practical difference from sending a PDF, which is fixed at whatever size it was exported.
What you can do once it is rendered
- Play it back: hear the tab rather than guessing at the rhythm. This matters most for students who cannot yet read rhythmic notation fluently.
- Change the tempo: slow a passage down to a speed where it is playable, then step it back up.
- Loop a section: mark the two bars that are actually causing trouble and repeat just those, instead of restarting the piece each time.
- Transpose: move the piece into a key that suits the student's voice or instrument.
- Switch between notation and tab: useful when a student is moving from tab-reading toward standard notation.
Why this matters for teaching
The gap between two lessons is where most practice actually happens, and it is the part of the week a teacher cannot see. A tab that a student can slow down and loop is a tab they can work on without you sitting next to them.
If you teach guitar, this connects directly to how you assign practice homework — you can point at a specific passage rather than writing "work on the bridge" and hoping it is interpreted the way you meant.
A note on where files come from
Tab files circulate widely online, and a large share of them are user transcriptions of copyrighted music. Rendering a file you already have is a technical operation, but distributing transcriptions of copyrighted works to students is a separate question, and one worth checking against the rules in your own country.