How to 3D Print House Keys (Easier)




This instructables will explain how to 3D Print a working key for your house or some padlocks. This is in case you want a spare key. I've seen other people have instructsable doing the same thing but trust me, this is much easier. In other ones you have to have skill and knowledge on 3D modelling, not much but enough to make it useless to people who have no interest or don't know how to model.

Please be careful as ABS or PLA aren't that strong and if you aren't careful may break inside your lock. All that is needed for this project is: The orginal key, 3D Printer, key decoder (3D Printed), small files.

Step 1: Make a Key Decoder

Go to
and 3D Print a key decoder unless you already have one.

Step 2: Decode the Key

Watch from 3:00 to 4:00

Place the first gap in the key closest to the handle inside the decoder and Slide it down until it stops at a number.Note down the number, then move onto the next gap on the key and dont stop until all 5 cuts in the key are recorded.

Step 3: Create the Key

Go to

Click on the customizer option above the download button. Type in the code that was decoded earlier in order. Look at the model, if it does not look like your original key then try reversing the keys number order. Then Create and download your key

Step 4: Print It Off

Obviously print your key that you have just made and try it out, don't stick it in the lock if its too tight, try filing or sanding the key until it fits the lock. If it does not work, in the customizer try reversing the number order of the key and check to make sure the key looks similar to the original.



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    8 Discussions


    2 years ago

    Great way to give your key to Makerbot, the NSA, Google and associates and of course crackers. DO NOT USE THE CUSTOMIZER, INSTEAD download the scad file and use open scad (don't save your ID) otherwise you'll give everyone who has access to your account and/or computer access to your house/lock too.

    2 replies

    Reply 1 year ago

    It's not that hard to pick and/or break a lock. If the NSA, etc. drives across the country to your house, do you honestly believe they'll be deterred by not having a copy of your key? I find that rather unlikely.


    Reply 2 years ago

    I dont think everyone knows where you live.


    Reply 3 years ago

    I've seen it work on most locks, but if it were rusted or something you may need lubricant or a tension wrench to turn it. In the locks I've tried it on the key turns easily without any felxing


    3 years ago

    How do you account for different groove patterns running the length of the blade?


    3 years ago

    Really cool! I love things like this!