Free 3D printing & modeling tools
Small, focused, no-signup tools that run entirely in your browser. No uploads, no ads, no watermark — just answers.
Which 3D format should I use?
Answer two questions, get the right format — STL, 3MF, STEP, GLB, USDZ and more — for printing, games, web, AR or CAD.
Open the chooser →Layer height vs nozzle size
Drag two sliders and watch the layer-line cross-section, print time and surface quality change live. Find the best layer height for your nozzle.
Open the visualizer →Can I sell this 3D print?
Pick a license, platform and use case and get a plain-English yes / no / depends — CC, GPL and marketplace terms layered together.
Open the checker →3D print troubleshooting
Pick your problem — stringing, warping, adhesion, under-extrusion and more — and get the likely causes ranked with the exact fix for each.
Open the fix finder →Print cost & time calculator
Upload an STL and we really slice it in your browser — no volume guessing — for an accurate time estimate and a full, editable price breakdown.
Open the calculator →Print orientation & printability
Drop in an STL and watch it rotate to the pose that needs the least support — overhangs and bridges coloured on the model — then download it re-oriented and centred on the plate.
Open the analyzer →Add texture to STL
Emboss or engrave surface texture onto any STL before you print: geometric patterns, knurling, wood and leather grain, or your own logo. You choose the pattern and where it goes — all in your browser, nothing uploaded.
Open the texturizer →Most reliable 3D printers
A printer reliability ranking built from 563,832 real-world print reports — success rates, trouble rates and sample sizes, with an honest method.
See the ranking →Add text to an STL
Drop in an STL, type your text, place it on any face and emboss or engrave it — then download the modified STL. All in your browser.
Open the editor →