Maker tools
Open Maker tools on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.
Page guide
Find the right tool and get straight to your task.
No account needed.Ohms law
Calculate current and power from voltage and resistance.
STL viewer
Preview an STL mesh and inspect its dimensions.
Image to STL
Turn a still image into a closed binary STL height-map relief with millimeter dimensions, a flat base and bounded sampling.
Resistor color code
Find a resistor's value from its colored bands.
DPI calculator
Calculate pixel density from pixel count and physical size.
OBJ to STL
Convert an OBJ mesh into an STL file.
STL to OBJ
Turn an STL mesh into an OBJ file for your next 3D workflow.
About maker tools
These 3D tools and maker calculators support electronics, 3D printing and craft projects. Ohms law and Resistor color code help you size and identify components on the bench. The STL viewer previews a model before you slice it, and Image to STL turns a picture into a printable relief. OBJ to STL and STL to OBJ move models between design and printing software, and the DPI calculator works out print and scan resolution.
For a 3D print, open the file in the STL viewer first to check its scale and orientation. For circuits, confirm a resistor value with both Resistor color code and Ohms law before you solder.
Popular maker tools
Common questions
Are my 3D models uploaded?
No. The STL viewer, Image to STL, OBJ to STL and STL to OBJ run in your browser. Your models and images are processed on your device and are not sent to our server.
What does Image to STL create?
It builds a height map relief with a flat base, where brightness in the image controls the height of each point. It is suited to lithophanes, signs and textured panels, not to rebuilding a full 3D object from a photo.
How do I read a resistor color code?
Read the bands starting from the end opposite the gold or silver tolerance band. The first two or three bands give digits, the next is the multiplier, and the last is tolerance. The Resistor color code tool does the math for 4, 5 and 6 band resistors.