Upload a photo of your failed print. The diagnosis examines the visual pattern — bed lift, layer behaviour, surface finish — and returns three concrete, printer-specific fixes ranked by likelihood. Usually under twenty seconds. No signup, no subscriptions.
About this tool
A failed 3D print rarely has one cause. The same lifted corner can come from a 3°C cold spot on one side of the heated bed, a part-cooling fan running 20% too high, a draft from an open window, an old PEI coating that’s lost its grip, or a moisture-laden PETG spool that’s been sitting in open air for three weeks. The fix depends on which combination of those is actually happening on the printer in front of you — which is exactly what makes scrolling through scattered Reddit threads frustrating. The advice that solved a problem for somebody else’s Bambu A1 Mini is often wrong for a Creality K1 Max, and vice versa.
WhyItFailed reasons through that combinatorial problem visually. You upload one photo of the failed print. The diagnosis examines what’s in the image — corner geometry, layer-line behavior, surface finish, overhang quality, colour and translucency cues — and cross-references it against the specific printer’s known failure modes, the slicer’s default behaviours, and the filament’s typical operating ranges. The output is three concrete fixes ranked by how likely each is to be the actual cause, not a generic “try lowering your temperature” checklist. The methodology page walks through how the system was built and what its honest limitations are.
Alongside the tool, we publish printer-specific troubleshooting guides covering the recurring quirks of every machine the diagnosis supports — from the Bambu A1 Mini’s open-frame warping behaviour to the Monoprice Voxel’s quick-swap nozzle assembly. The guides are written and edited by hand by Owen Drysdale, who runs a small print farm of Bambu and Creality machines, and updated when the underlying hardware or firmware changes. The tool runs the diagnosis; the guides explain the why.
The failure library
Got a print that doesn’t match anything below? The AI handles those too. These are just the failure modes we get asked about most.
By printer
Different printers fail in different ways. The diagnosis tool tailors fixes to your specific machine; the guides below cover the recurring quirks of each.
How it works
No account, no downloads, no Reddit thread. Real printer-specific advice in the time it takes to re-level your bed.
Take a picture of your failed print with your phone. Any angle, any lighting. The AI reasons about what it sees.
Pick your printer (Bambu, Prusa, Creality, or 20 more). Slicer and filament are optional but sharpen the answer.
Prioritized, printer-specific, in plain English. Usually 10–20 seconds. Refine for more detail if the AI asks.
Pricing
No subscriptions. No recurring charges. Buy credits when you need them, use them whenever. They never expire.
Free trial
$0one per device
Test-drive the diagnosis on a real failed print before you spend a cent.
Single diagnosis
$0.99per use
For the occasional failed print. One-time, no subscription.
5-pack
$2.99one-time
Best value. If you print weekly, this pays for itself on the first fix.
FAQ
The basics first. Specific failure-mode questions live in the individual troubleshooting guides.
Upload a photo of the failed print, optionally tell us your printer, filament, and slicer, and our AI examines the visual failure pattern and returns three printer-specific fixes prioritized by likely impact. The whole flow takes about twenty seconds. No account, no downloads.
For typical visible failure modes — stringing, warping, bed adhesion, layer shifting, under-extrusion, overhang collapse — the diagnosis is usually correct on the first try and rarely off-base on the second. For unusual failures or composite issues, the AI is honest about uncertainty and asks clarifying questions when it needs them.
All major consumer printers including Bambu Lab (A1 Mini, A1, P1S, P1P, X1, X1C), Prusa (MK4, MK4S, MINI+), Creality (Ender 3 family, Ender 3 V3 KE, K1, K1 Max), Anycubic, Elegoo, and 20+ others. The diagnosis is tailored to whatever printer you select.
Any angle and any lighting work as long as the failure itself is visible. Phone photos taken on the print bed are perfect. The AI handles bad angles, mediocre lighting, and partial views. It will tell you if it needs a clearer shot.
Speed and consistency. A Reddit thread takes hours, gets ten conflicting answers, and most replies don't know your specific printer. WhyItFailed gives you three printer-specific fixes in twenty seconds. You still know your printer better than anyone — but you start from a better starting point.
Photos are processed and discarded after diagnosis. We do not train AI models on your images, and we do not share them. The diagnosis result is stored anonymously to power the live counter on the homepage and to improve the diagnostic model over time.
The first diagnosis is free, no signup. After that, single diagnoses are $0.99 and a 5-pack is $2.99. No subscriptions, no recurring charges, and credits do not expire for at least one year.
You can refine the diagnosis with more context — the same conversation continues without using another credit — or re-upload a photo at a different angle. If you ran a paid diagnosis and the result was clearly wrong, contact support@whyitfailed.fyi and we will refund the credit.