Is there a free online slicer?

Slicers that run in a browser

Kiri:Moto: free, no account, nothing uploaded

Kiri:Moto (by Grid.Space) is a complete slicer that runs inside the browser tab. It's free, open source (MIT licence) and has no ads; the slicing happens on your own computer and nothing is sent anywhere. It takes STL, OBJ and 3MF, has printer profiles you can adjust (or import from PrusaSlicer), and also does CNC and laser work. It can also be installed as an app.

It's the best choice for a school or work Chromebook, or any computer where you can't install software.

Cloud slicers: free accounts with limits

These slice on a server, so you upload the model and need an account. Free limits as of November 2026:

• Prusa EasyPrint (on Printables, and in the Prusa app): runs PrusaSlicer in the cloud, free with a Prusa account, up to 60 seconds of slicing per bed. Since April 2026 it takes your own STL and 3MF files, not only Printables models. Most settings are automatic. It works with Prusa printers and a list of other brands: check that yours is on it.
• SimplyPrint: printer management with cloud slicing by PrusaSlicer, OrcaSlicer, Bambu Studio, Cura and others. The free plan has 15 cloud slices a month for 2 printers; its Kiri:Moto option runs in your browser and isn't counted.
• Printago: Bambu Studio and OrcaSlicer engines in the browser, 60 minutes of cloud slicing a month free.
• MakerWorld (Bambu Lab): models with a creator's print profile can be sliced in the cloud for your printer and sent from the Bambu Handy app. It works for MakerWorld models, not for files on your phone.

Not slicers: Tinkercad designs and exports STL but doesn't slice (its 3D Print export sends to services that do). OctoPrint no longer has a built-in slicer.

When a desktop slicer is better

For regular printing, the free desktop slicers do much more: every setting, supports you can paint, multi-colour, your printer's exact profile, and no limits or uploads. All four are free:

• PrusaSlicer (2.9.7): Windows, Mac and Linux (Flatpak).
• OrcaSlicer (2.5.0): Windows (including ARM), Mac and Linux, with profiles for most brands.
• Bambu Studio (2.9.1): Windows, Mac and Linux; the natural pick for Bambu Lab printers.
• UltiMaker Cura (5.14.0): Windows (now including ARM), Mac and Linux.

Cloud slicers also cap how much they'll slice for free, and a browser has less memory to work with than a desktop app, so very large models are a desktop job (see when the slicer crashes on a big STL).

On a Chromebook

• Linux turned on (Settings → Developers): Cura and PrusaSlicer install and run on most Intel and AMD Chromebooks. ARM Chromebooks have fewer choices; OrcaSlicer publishes ARM Linux builds.
• School or work Chromebook where Linux is switched off: use Kiri:Moto, or a cloud slicer.

Check the G-code before you print

Whichever slicer you use, look at the result before sending it, especially from a slicer you don't know well. Open the file in the G-code viewer (it reads .gcode, Prusa's .bgcode and Bambu's .gcode.3mf in the browser) and check:

• the first layer covers the bed where you expect, at the right size;
• no layers float in the air and no walls are missing;
• the print time and filament make sense;
• the file was made for your printer and nozzle size.