3D Printing Tools

View STL, OBJ, PLY, GLB, glTF, 3MF and STEP files in your browser. Rotate, zoom and measure. Free and private, nothing is uploaded.

Free online STL repair. Fix non-manifold edges, holes, flipped normals and loose geometry in your browser - no upload, no signup.

Lower the triangle count of STL, OBJ, GLB and PLY meshes while preserving shape. Free in-browser decimation - no upload needed.

Free 3D file converter. STL to OBJ, OBJ to STL, GLB to STL, STEP to STL and more - converted locally in your browser.

Check the exact size, volume, surface area, triangle count and watertightness of any STL, OBJ, GLB, 3MF or STEP file - free.

Resize STL files by a factor, to an exact dimension, or convert inches to millimeters. Free in-browser scaling with live preview.

Cut an STL in half along any axis with clean capped faces. Split large models into printable parts - free, in your browser.

Mirror an STL along the X, Y or Z axis to create left/right versions of a part, with normals corrected so it stays printable.

Upload an STL and get filament weight in grams, length in meters and material cost, computed from the model's real volume.

Free 3D print and filament cost calculator. Work out the price of a print from filament weight, electricity, machine wear and failure rate, then add your margin.

Model a 3D printing business end to end. Set your printers, job mix and prices, and see monthly revenue, profit and how many hours of your own time it costs.

Calculate the physical distance your 3D printer needs to reach target speeds. Understand the relationship between acceleration, velocity, and print quality to optimize your motion system.

Calculate the correct E-Steps value for your 3D printer to fix extrusion issues and improve print quality.

Recommended drying temperatures and times for PLA, PETG, ABS, TPU, Nylon and more. Remove moisture for better prints.

Convert 3D printer filament length to weight (or vice versa) based on material density. Supports PLA, PETG, ABS, and more.

Calculate remaining filament on a spool by weighing it. Includes database of common empty spool weights.

Calibrate the extrusion multiplier (flow rate) for your 3D printer from a single-wall test print. Fix over and under-extrusion for accurate wall dimensions.

Estimate how much filament (weight, length, cost) a print uses at a given infill percentage and material.

Find the optimal 'magic number' layer heights for your 3D printer to reduce Z-wobble and improve print quality.

Calculate the scaling factor to compensate for 3D printing material shrinkage. Preset data for PLA, ABS, ASA, PETG, Nylon, PC, PP, TPU, and HIPS.

Calculate the true cost of resin 3D printing including resin usage, electricity, consumables, and failure rate markup.

Calculate the safe Reference Voltage (Vref) for your 3D printer stepper drivers. Supports TMC2208, TMC2209, A4988, and more.

Find the right hole diameter for metric screws (M2-M12). Tap drill, clearance hole, and heat-set insert pilot sizes with FDM print compensation. ISO 261/273 data.

3D printing tolerances made simple. Get the right clearance for press fit, sliding fit, and clearance fit between printed parts on FDM, SLA, and SLS, with an adjustable safety margin.

Calculate the volumetric flow rate (mm³/s) for your 3D print settings to ensure you stay within your hotend's melting capacity.