What STL formats are supported?

Binary and ASCII STL. Files of either flavour open the same way — the viewer detects the format automatically.

Will my file leave the browser?

No. Parsing and rendering happen in your browser tab. Nothing is uploaded to a server.

Does it support OBJ, PLY, GLB, or 3MF?

Yes. Drop any OBJ, PLY, GLB, glTF, or 3MF file — the viewer auto-detects the format. Separate landing pages exist at /tools/open-tools/obj-viewer etc for each format's SEO.

What about STEP / IGES / DWG?

STEP support is in active development — Loft's CAD engine is being built specifically for it. IGES and DWG are out of scope for the browser viewer; convert upstream to STEP or GLB.

Why does the engine version show in the status bar?

The viewer loads our in-browser CAD engine (Rust → WASM) and surfaces its version as a wire-contract check. The full B-rep STEP pipeline that engine drives ships in a later release; the STL path you're using today is pure JavaScript.

› Open Anything ›

STL Viewer

History

Support

Loft Browse tools

PDF & Documents 33 Image Tools 12 Dev Tools 6 Audio and Video 8 Cooking & Kitchen 2 Security & Privacy 4 Network & Sysadmin 2 Finance Tools 1 Open Anything 8

PDF & Documents View all

Add PDF Header & Footer
Annotate PDF
Compare PDF
Compress PDF
Crop PDF
Delete PDF Pages
Deskew PDF
Extract PDF Images
Extract PDF Pages
Extract PDF Tables
Extract PDF Text
Flatten PDF
HTML to PDF
Image to PDF
Merge PDF
OCR PDF
PDF Bates Numbering
PDF Bookmarks Editor
PDF Editor
PDF Grayscale
PDF Metadata Editor
PDF N-Up
Protect PDF
Redact PDF
Reorder PDF
Repair PDF
Resize PDF
Rotate PDF
Scan to PDF
Sign PDF
Split PDF
Unlock PDF
Watermark PDF

Image Tools View all

Barcode Generator
Color Palette Extractor
Color Picker
Compress Image to Exact KB
DPI Changer
ID Photo Maker
Image Compressor
Image Format Converter
Image Metadata Editor
Image Resizer
QR Code Generator
RAW to JPG Converter

Dev Tools View all

CSV to JSON
Hash Generator
IP Subnet Calculator
Log Query Workbench
Subnet Planner
UUID Generator

Audio and Video View all

Audio Converter
Audio Tag Editor (ID3)
Compress Audio
Extract Audio from Video
Remove Audio from Video
Video Compressor
Video Converter
Video to GIF

Cooking & Kitchen View all

Canning Calculator
Sourdough Calculator

Security & Privacy View all

EVTX Explorer
File Encryption
Identity Inspector
Secure Note Sharing

Network & Sysadmin View all

PCAP Analyzer
Serial Console

Finance Tools View all

Chart Overlay Studio

Open Anything View all

3MF Viewer
DXF Viewer
Gerber Viewer
GLB / glTF Viewer
OBJ Viewer
PLY Viewer
STEP Viewer
STL Viewer

Loft Tip

Your settings persist in the URL

Many calculators and converters store their inputs in the page URL hash. Bookmark the link to come back to the same numbers later.

See all tools

Keyboard shortcuts

Open search Ctrl +K
Open search (alt) /
Close any modal / drawer Esc
Show this help ?
Move focus forward Tab
Move focus back Shift +Tab

Press ? anytime to reopen.