Free No account needed

Print Flute

Side-blown flutes tuned to the key you pick, exported as STL or STEP in one piece or in parts

Print Flute is a free browser tool for makers who want to print a playable flute in a chosen key. Free web app that runs in your browser; no account, paid tier or ads seen. Exports STL and STEP. Last checked 26 September 2026.

Open Print Flute See alternatives

Opens printflute.com

What is Print Flute?

Print Flute is a free browser tool that designs a simple side-blown flute from acoustic formulas and exports it as a printable file. You set the key by choosing the lowest note, from C4 to G#5 or a custom frequency, and the app works out where each finger hole has to sit. The starting design is a D5 flute with six holes and a 14.3 mm bore.

The builder runs in three steps. First you enter the bore, wall thickness, blow hole size and number of tone holes (3 to 8). Next you get a table of hole sizes and calculated distances, plus a thumb hole you can switch on or off. Last you round the hole edges and cut the tube into as many as six sections joined by connectors, so a long flute fits a small bed. Export gives one STL or STEP file, or one file per part. Advanced mode adds cork, overhang, lip coverage and per-hole pitch settings.

A tuner and a timbre analysis view listen through your microphone, so you can compare a printed flute with the predicted notes, and a library saves designs in your browser, with JSON import and export. It is an early project (version 0.1.0 in September 2026) with little visible use, so it suits makers happy to test a first print.

What you can make

Side-blown flutes in a chosen key
Flutes with 3 to 8 finger holes and an optional thumb hole
Flutes split into sections for small print beds
Flutes tuned to a custom base frequency

How to use Print Flute

Open the Print Flute builder and pick the lowest note of your flute
Set bore, wall thickness, blow hole size and number of holes, then click Next Step
Check the tone hole table and turn the thumb hole on or off
Set the number of cuts and connector length, then click Export
Choose Full Flute or Separate Parts, pick STL or STEP and download

What you'll need to print it

Filament and parts that suit what you make with Print Flute.

Multicolor PLA

Matte PLA

6 x 2 mm magnets

Also handy

Print removal and cleanup tools

Bambu Lab Print Finishing Kit Bambu Lab
Bambu Lab Maker's Supply ESD Stainless Steel Tweezers Set Bambu Lab

Some of these are affiliate links: we may earn a small commission, at no extra cost to you. More about that

Print Flute pros

Calculates the finger hole positions for you from the key you pick
Cuts a long flute into up to six parts with connectors so it fits smaller printers
Built-in tuner and timbre analysis let you check the printed flute with your microphone

Print Flute cons

Early project (v0.1.0) with no visible user community, so real print results are unproven
Makes only one instrument type, a side-blown flute
Advanced settings such as cutoff ratio and lip coverage assume some acoustics knowledge