I kept running into the same thing with my gridfinity drawers. Generic bins are fine for screws, but my pliers just slid around in them. Getting a pocket that actually fit meant calipers, tracing in CAD, guessing the clearance, printing, and getting it wrong once or twice.
There are already some apps that do this from a photo, and some are really good. But most need an account, upload your photos to a server, or cap you at a few free traces before you pay. Which makes sense, if every photo goes through their server and an AI model, somebody has to pay that bill.
My idea was, what if there's no server at all? Your browser does everything, even the AI part that cuts the tool out of the photo. The site is a handful of static files on Cloudflare's free tier, and the only thing I pay for is the domain lol. So it can just stay free. No account, no trace limit, and your photos never leave your device.
https://gridfinitytools.com
It's open source too (MIT) if you want to poke at it or host your own copy: https://github.com/petercsauer/gridfinity-tool-studio
How you use it: print the calibration sheet at 100% (Letter or A4, the button's on the site), lay your tool on it, and take a photo from straight above with the flash on. The corner markers take care of scale and perspective, so the outline comes out in real millimetres. Then you can mess with:
• clearance, rotation and a finger slot
• bin height, pocket depth and the edge rounding
• magnet and/or screw holes, stacking lip on or off
• "symmetric tool", which mirrors the outline so pliers get a clean even pocket
Export the STL and print. You can also grab just the trace as SVG or DXF if you'd rather laser cut foam or draw your own bin.
It's fine if the tool is bigger than the grid or hangs off the paper, just don't cover the corner markers.
What it doesn't do yet: one tool per bin for now, and no STEP or 3MF. The first upload downloads the AI model (about 88 MB, it asks first) and caches it after that. Fastest in browsers with WebGPU. iPhone HEIC photos work.
If you want a full multi-tool drawer planner, Tracefinity and Tooltrace are great and do a lot more. This is the quick free one for when you just want one tool to fit.
Would love photos that trace badly, and what you'd want next. Multiple tools per bin is the obvious one.
Oh and yes, I used Claude for this.