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Simpel3D review

Freemium#26 of 31 in 3D File Converter Software

A low-cost web converter for common CAD and mesh files headed to 3D printers.

6.7/10Editor score
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Simpel3D6.7 Visit Simpel3D

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Simpel3D is a browser-based converter for makers, engineers, and 3D-printing users. It converts STEP, IGES, STL, OBJ, and 3MF files into STL, OBJ, or 3MF output. Processing runs locally in the browser through WebAssembly, so files are not uploaded to a server. Mesh health checks cover watertight status, dimensions, triangles, and volume, while slicer-ready output supports workflows involving Cura, PrusaSlicer, and Bambu Studio.

Pricing is flexible for occasional and recurring use. The Free plan costs $0 forever, requires no account, includes STL, OBJ, and 3MF output plus Mesh Health Check, and is limited to personal use. Standard costs $6.99 per month or $69 per year, adding a commercial license, batch conversion, and large-file splitting. Pro costs $12.99 per month or $99 per year and adds unlimited conversions and a privacy certificate. A $1.99 one-time Day Pass provides unlimited conversions for 24 hours, commercial use, and no account requirement.

Simpel3D fits users who need a focused conversion step before slicing rather than a broad 3D design environment. Paid plans can batch-convert files, and automatic splitting helps prepare large STEP assemblies as separate parts. The main trade-off is format scope: conversion accepts five formats, but output is restricted to STL, OBJ, and 3MF. Its web-only delivery and 30MB maximum file size also shape the workflow. Choose it for affordable, browser-based 3D-printing conversion; choose an alternative when broader output formats or larger-file handling are essential.

Simpel3D pros and cons

  • Where it wins
    • Converts STEP, IGES, STL, OBJ, and 3MF files
    • Local WebAssembly processing keeps files from server uploads
    • Paid plans add batch conversion and assembly splitting
  • Where it doesn't
    • Output is limited to STL, OBJ, and 3MF
    • Web-only access requires a 30MB maximum file size
    • Free plan is for personal use only

Simpel3D fact sheet, pricing and score →

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