OptiBot – Free Chibi Optimus Prime ( STL + 3MF )

Meet OptiBot – an adorable chibi robot hero inspired by Optimus Prime from Transformers, and he’s 100% FREE to download and print. A fan-made tribute to the legendary blue-and-red leader of the heroic robots, OptiBot packs an oversized head, bold colors and a confident stance into a fun, beginner-friendly figure.

This free pack includes multiple versions and sizes:

What’s included:

• 🗝️ Keychain version – 50 mm & 100 mm – a cute mini OptiBot to print in color and carry, gift, or clip onto your keys or bag
• 🎨 Display figure – 200 mm, full color – split into 5 separate parts for easy multi-color / AMS printing in his classic red, blue and silver – no painting needed
• ⚪ Display figure – 200 mm, solid (uncolored) – for clean one-color printing or for painting it your own way
• ✅ STL + 3MF files included
• ✅ Optimized for both resin (SLA / DLP) and FDM printers

Why you’ll love OptiBot:

• Completely free – download, print and enjoy
• Choose your size: tiny 50 mm keychain up to a 200 mm display figure
• Chibi proportions = a fast, easy, satisfying print
• Crisp detail on resin, vibrant colors on FDM
• A perfect desk buddy, keychain, gift, or printer test model

Whether you print the handy keychain, the full-color 200 mm figure, or the solid version to paint yourself, this chibi Optimus Prime-inspired robot adds a little heroic charm to any collection.

👉 Grab your free OptiBot today – then explore the full SANIX3D catalog for more high-detail STL files of characters from movies, games, anime and comics, with new models every month.

OptiBot is an original fan-art tribute inspired by Optimus Prime / Transformers. Not an official product; not affiliated with or endorsed by Hasbro.