Kiln 1.2.0 is a big release, and most of it is free. Kiln’s web app grew up. At kiln3d.com you can now pick from Kiln’s built-in list of ready-to-make objects (a coaster, a keychain, a jewelry tray, and more), decorate it with textures, your own photos, and logos (all previewing live in 3D), and open any 3D file you already have just to look at it. Under the hood, Kiln also learned a second way to design (free-form organic shapes, alongside its precise parametric parts), its one-step repair for broken and AI-generated models got noticeably sharper, and it recovers from print failures more intelligently, from skipping a single failed part to triaging a whole shop after an outage. A few of the deeper recovery and engineering features are Kiln Pro and Business; the rest is free for everyone.

View, create, and decorate an object in the browser

Create. Sign in and go to kiln3d.com/create: no install, no printer setup, no API key. Choose from Kiln’s built-in list of ready-to-make objects (coaster, keychain, jewelry tray, nameplate, and a dozen more), and the model drops into the 3D viewer the moment it’s ready. No download or round-trip needed to see it.

Decorate. Then finish it right there. Pick a color or a surface texture (tiger stripe, alligator, camo, marble, and more), drag the depth slider to make the carve shallower or deeper, and watch it update live in 3D. Drop in your own photo or logo and drag it exactly where you want it, or just type a word and Kiln engraves it. Every texture wraps a surface edge to edge and sizes itself to the material automatically, so it looks right the moment it lands. All free. (Turning your own pattern into a reusable texture, and saving finishes to your library, are Kiln Pro perks.)

View. Already have a 3D file? Open it at kiln3d.com/view and just look at it: STL, OBJ, 3MF, GLTF, and more, or even a sliced G-code file you can scrub layer by layer. No account, and nothing leaves your browser. And for the designs you’ve saved to Kiln, you can walk their full history and branches in the browser: every version, side by side (Kiln Pro).

Or drop a 3D file straight into your Designs tab: spin it around on the stage for free, and import it into your workshop as a versioned design you can branch, restyle, and open anywhere (Kiln Pro). STL and 3MF.

Every make tells you what it assumed

In plain English, no jargon. Ask for a coaster and Kiln says something like: “Made it for your desk, in regular plastic. Heading outside in the sun? Tell me and I’ll switch to the tough stuff.” No guessing what it decided, and the one question that actually matters is right there.

Kiln can sculpt now, not just build

Up to now, Kiln’s designs were precise and parametric: brackets, boxes, anything with exact measurements. 1.2.0 adds a second way to make: describe a free-form, organic shape (a smooth vessel, an open cage, a curvy sculptural form) in plain words, and Kiln sculpts it. No add-on, no key. It’s new and still improving, and free to make and refine as much as you like.

Broken and AI-generated models come back clean, and look like the original

The one-step repair for broken or AI-generated models turns holey or messy meshes into a clean, print-ready solid, with a plain-English summary of what changed and a preview from every angle. It also got noticeably more faithful: creases, tips, and thin details that used to blur into a generic blob now come back sharp, and small gaps heal cleanly instead of leaving a ragged seam. Free users get 2 repairs a month to try it; upgrade to Pro tier or higher and the limit is gone, tuned further to your exact printer and material.

Skip a failed part mid-print, and keep the rest

When one object on a full plate fails, Kiln now tells you exactly which part to skip and how much of the print you keep by dropping it, then skips just that part so the rest finishes. Auto-recovery can even make the call on its own, on printers that support it and only when you’ve allowed it, getting more confident as real outcomes come in. Skipping a failed part is a Kiln Pro feature on your own printer, and Business+ does it across a whole fleet at once.

Recover from a power loss or a shop-wide outage

Power loss on a Klipper printer? Kiln resumes the same print from where it stopped, not a reprint, with a quick confirmation from you (Kiln Pro). And after a shop-wide outage, Kiln checks every printer in a mixed-brand, mixed-model fleet and sorts them into self-recovering, needs-a-quick-look, or reprint (Business and up).

Control your printer’s fans directly

Dial the part-cooling fan to any speed: more airflow for overhangs and bridges, gentler cooling on warp-prone materials. Works across Bambu Lab, OctoPrint, Moonraker/Klipper (Creality’s K-series and Ender-3 V3 line included), direct-USB, and Elegoo’s Centauri Carbon. Bambu Lab printers also get the auxiliary and chamber fans, with the chamber fan available on enclosed models. Free for everyone.

An honest answer on skin contact

Designing something you’ll wear? Kiln now gives you a straight answer on skin contact. Make a ring, band, watch strap, earbud, or glasses, and Kiln flags what matters about wearing a printed part against skin, honestly (no 3D print is truly “skin-safe”). It points you to a professional for anything medical, and it never blocks your print. The deeper material and compliance guidance is available on paid plans.

Bambu error codes, decoded (Kiln Pro)

Paste the HMS code straight off your Bambu printer’s screen or app into a troubleshooting check. Free tells you where to look (Bambu’s own explanation). Upgrade to Pro tier or higher and Kiln tells you what it means and what to do about it: the plain-English cause, the fix, and how serious it is.

Get real guidance on the magnets in your design (Kiln Pro)

Ask about a magnet you’re using and Kiln recommends what actually holds up for your use case. Safety warnings (pinch risk, swallowed-magnet emergencies) are always free, on every tier. Business flags real risk in your exact setup, like a documented temperature or coating mismatch, before you commit to a batch. Enterprise checks whether what a supplier declared actually holds up against Kiln’s own engineering data, so a paperwork-complete packet can still get flagged before a big order.

Proof a file really came from Kiln

Every file Kiln makes now carries a built-in note (Made, Modified, or Processed with Kiln) plus a digitally signed record that proves it came from Kiln and hasn’t been altered since. Anyone can check a file, no account required: drop an STL or 3MF at kiln3d.com/verify and it tells you whether Kiln really made it and whether the bytes are untouched. Someone can delete the visible note from a copy, but the signed record still tells the truth, and a file Kiln only imported or downloaded makes no such claim. Free for everyone.

Want your name on it? Turn on creator credit (Kiln Pro), and every file you make also carries your name, a link back to you, and an optional license notice, all shown on that same verify page. Your creator name is separate from your sign-in, changes at most once every 30 days, and an old name stays permanently yours, never handed to anyone else.

Smaller fixes that add up

Sharper 3D previews everywhere: models, AI-generated designs, decoration mockups, printer thumbnails, all noticeably crisper.
Carved logos and images no longer pick up a stray frame or mirror text-bearing marks.
Actually delete a saved decoration, feature, or design instead of only archiving it, and the decorations library now shows real preview images (Kiln Pro).
Signing a decoration release shows you what you’re signing before it’s finalized (Kiln Pro).
Stack a color pattern over a surface texture in one print (Kiln Pro). Applying either one on its own is part of your free monthly decorations.
Applying a color texture now takes seconds instead of minutes, and the colorway swatches in the web app render sharper.
Two-factor sign-in no longer wrongly asks you to set it up again once it’s already on.
Accepting Kiln’s terms is clearer, showing you exactly what you agreed to and when.
The free setup prompt installs the right build of OpenSCAD (the engine Kiln designs with) automatically, and kiln doctor checks it honestly instead of waving a missing one through.
Upgraded Bambu A2L support (Kiln Pro) adds expert reading of the printer, including clog and feed-jam detection, a build-plate-seated check, and clearer AMS guidance. Free tier still works great with the A2L; Pro and above just goes further.

Full release notes: CHANGELOG.md.

Upgrading

New here? Run pip install kiln3d, then follow the install guide to connect Kiln to your AI assistant: Claude Desktop, Claude Code, Codex, or any other compatible AI client.
Already use Kiln? Run pip install --upgrade kiln3d to move to 1.2.0.
On a paid tier? Upgrade to 1.2.0 too, so the new recovery and engineering features line up.

Get Kiln →