EDIT AND REPAIR
your STL files.
Essential is a browser-based 3D editor for preparing STL files: sculpt surfaces, repair meshes, set dimensions in millimetres and create a flat base. Export the result for your slicer.
Why model in your browser
No software to install, no dedicated computer needed: Essential goes wherever you work.
Zero installation
No exe to download, no license to activate: open the link and get to work, from Windows, Mac, Linux, or even a Chromebook.
Always the latest version
Since it's a web app, every new tool and fix is available instantly, with nothing to download or update.
Your models stay yours
Modeling happens locally in your browser, with autosaves stored on your device: close the tab and pick up right where you left off.
Included with the Partner plan
Essential is included with every Partner subscription: no extra cost to prepare your STLs before printing.
Watch Essential in action
Original file: 48.20 MB
Current mesh: about 48.17 MB
Everything you need before the slicer
From a raw file to a clean, print-ready model, without ever leaving your browser.
Sculpting brushes
Inflate, remove material, smooth, deform with the elastic brush, or add local detail: five brushes with adjustable radius, strength and hardness, with real-time preview.
Automatic repair
Closes open edges, fixes defective faces and mesh cavities, even without a full remesh, so you don't lose detail or bloat the file.
Remesh & simplify
Rebuild topology with surface subdivision or voxel remesh, or reduce the triangle count while keeping the original shape.
Flat base
Place a cutting plane and get a flat, closed base in one click, ready for the print bed.
Precise dimensions
Resize per axis in millimeters, with locked or free proportions, and revert to the original size anytime.
Undo/redo history
Every stroke and every transform can be undone: experiment freely without any risk of ruining your model.
From raw file to print
Upload
Drag your STL or OBJ into the browser, or pick it from your computer.
Model
Sculpt, repair, resize and simplify until the model is exactly right.
Export
Download the clean STL and send it straight to your favorite slicer.
What we're building next
Essential keeps evolving — here's what we're working on.
Split, for printing without an AMS
Soon you'll be able to split a model into separate parts meant to be printed individually — one per color or material — and glued together afterwards, no AMS system required.
Practical guide
How to repair and resize an STL online
Prepare the geometry and dimensions in Essential before adding texture or colour.
Check the dimensions
Load your STL or OBJ and set the height in millimetres. A 10–20 cm figurine is 100–200 mm tall: check its proportions before adding details.
Repair and prepare the base
Use repair to correct the mesh and create a flat base with the cutting plane if needed. Simplify heavy models while assessing how much detail to keep.
Export for the next step
Download the edited STL. Open it in Texture Studio for relief, in Color Studio for painting or directly in your slicer.
Check the model in your slicer after editing: mesh repair does not replace checking wall thickness, supports and print dimensions.
Ready to start modeling?
Essential is free with ads and a weekly export limit, and included with no limits in every Partner plan. Activate your subscription to export without ads.
Become a Partner