STL → OBJ · free

Convert STL to OBJ, free

Drop in a .stl file, get a .obj back in seconds — with a 3D preview so you can check it before you download. Free, no account, no watermark.

Converter engine: ready
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Drop a file, or click to choose

Supports .stp / .step / .stl
STP → Free
Drag to rotate · scroll to zoom
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Your file stays private. It is processed on our own servers in Canada, never shared, and deleted automatically within 24 hours (a STEP you paid for is kept 30 days so you can re-download it).
Queued…

Conversion complete Free

Free 3D preview before you pay STL · OBJ · PLY · 3MF · GLB · glTF · STEP Processed on our own servers in Canada No install, no CAD licence needed
STL → OBJ

STL to OBJ: what is kept and what is lost

Going from STL to OBJ does not add detail — you get the same triangles in a format that more DCC and game tools accept.

The triangles themselves are carried over exactly — nothing is re-meshed, simplified or smoothed. Need a CAD file rather than another mesh? Our mesh to STEP tool rebuilds real, editable surfaces instead of translating facets.

Upload your STL

Files up to 100 MB. Nothing to install.

Pick OBJ as the target

It's preselected on this page. Other mesh formats are in the same drop-down.

Preview and download

Check the model in the 3D viewer, then download. Free, no account.

What is STL?
STL stores a surface as plain triangles — no units, no colour, no curves. It is the default format for 3D printing and what most scanners, slicers and sculpting tools export.
What is OBJ?
OBJ is a simple text-based mesh format from Wavefront, used across sculpting, game and scanning tools. It can reference materials and UV coordinates alongside the geometry.
FAQ

Questions about STL to OBJ

Is STL to OBJ conversion free?

Yes — all mesh-to-mesh conversions are free and unlimited for normal use (fair-use limit: 60 conversions per hour), with no account and no watermark.

Does converting change my model?

No. The vertices and triangles are written out unchanged; only the container format differs. Anything the target format cannot store (see above) is left out.

What's the largest STL I can convert?

100 MB per file.

Can I convert a mesh into a CAD file?

Yes — that's our main tool. Mesh to STEP rebuilds meshes and scans as NURBS surfaces, planes and cylinders in a solid STEP file.

Other converters
OBJ to STL3MF to STLSTL to 3MFPLY to STLGLB to STLSTL to GLBOBJ to GLBSTL to STEPOBJ to STEPSTEP to STL
Pricing

Free to convert and preview. Pay only for the STEP you keep.

Mesh conversions and STEP → mesh are free, forever, without an account. Reconstruction (mesh → editable STEP) always runs at full quality and the 3D preview is free — one download costs one credit. Failed conversions and re-downloads are never charged.

Free
Try it on your own part
$0
  • All mesh conversions, unlimited
  • STEP → mesh, unlimited
  • Unlimited reconstruction previews
  • 3 free STEP downloads when you sign up
Pay as you go
One part now and then
$12 / 10 downloads
  • Or 30 downloads for $30
  • Credits never expire
  • No subscription
  • Small “Converted by Vertessia” note in the STEP header — geometry untouched
Maker
Regular reverse-engineering
$19 / mo
  • 30 STEP downloads / month
  • Clean STEP header
  • Priority queue
Pro
Scanning & print services
$79 / mo
  • 200 STEP downloads / month
  • Clean STEP header
  • Priority queue

Higher volume? Team — 1,000 downloads / month for $249 — . API usage draws on the same credits. On-premise licensing for medical, defence and manufacturing: info@vertessia.com