Freedom251 › 3D File Converter Software
Simpel3D
What Simpel3D is
Simpel3D is a web-based converter for makers preparing 3D files for printing. It accepts STEP, IGES, STL, OBJ, and 3MF files and produces STL, OBJ, or 3MF output. The site says conversion runs in the browser using WebAssembly, without uploading files to its servers. Large STEP assemblies can be split into individual printable parts and downloaded together as a ZIP. After conversion, Simpel3D reports watertight status, dimensions, triangle count, and volume. The maker says output is tested in Cura, PrusaSlicer, and Bambu Studio. A free plan allows three conversions per day, STEP files up to 10MB, and personal use. Paid choices include a one-time 24-hour Day Pass, plus monthly and annual Standard and Pro plans. Standard and Pro include commercial use; Pro also includes a privacy certificate. The tool does not convert files back to STEP or IGES. Its privacy policy says it collects no analytics or IP addresses, and that the daily conversion counter is kept in browser localStorage. The policy also names Paddle for payment processing, Cloudflare Pages for hosting, and JSDelivr for delivery of the WebAssembly library.
Who it suits
Simpel3D suits makers who need to convert common 3D file formats into formats used for printing, including people handling large STEP assemblies. Its free tier is for personal use, while Standard and Pro plans include commercial use.
What it does well
- Converts five input formats into three output formats.
- Processes files locally in the browser, according to the site.
- Can split large STEP assemblies and package parts in a ZIP.
- Reports mesh status, dimensions, triangle count, and volume.
- Output is described as tested in three slicers.
What to know first
- The free plan permits three conversions per day.
- Free use is personal only.
- It cannot convert back to STEP or IGES.
- Free-plan STEP files are limited to 10MB.
Limits
The free plan provides three conversions per day, STEP files up to 10MB, and personal use only. The Day Pass lasts 24 hours; Standard allows 15 daily conversions and STEP files up to 30MB, while Pro offers unlimited conversions and STEP files up to 60MB. Paid plans include commercial use, with batch sizes and other limits varying by plan.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | forever · 3 conversions/day · STEP up to 10MB · STL, OBJ, 3MF output · personal use only | Free |
| Pro | per month · Unlimited · STEP up to 60MB · batch 5 files · commercial license · privacy certificate | $12.99 a month |
| Day Pass | one-time · 24 hours · Unlimited 24hrs · STEP up to 30MB · batch 3 files · commercial license · no subscription | $1.99, paid once |
| Standard Annual | $69/yr — save 2 months · 15 conversions/day · STEP up to 30MB · batch 3 files · commercial license | $69 a year |
| Standard | per month · 15 conversions/day · STEP up to 30MB · batch 3 files · commercial license | $6.99 a month |
| Pro Annual | $99/yr — save 2 months · Unlimited · STEP up to 60MB · batch 5 files · commercial license · privacy certificate | $99 a year |
As simpel3d.com lists them, read 8 Oct 2026. The maker's own page has the final word.
Getting started
- Open the Simpel3D website in a web browser.
- Choose the Free plan or a paid plan that fits your conversion needs.
- Add a supported 3D file for conversion.
- Select an available output format and convert it.
- Review the reported mesh details and download the output.
Verdict
Pick Simpel3D if you need browser-based conversion to STL, OBJ, or 3MF and value its assembly splitting and mesh reports. Look elsewhere if you need conversion back to STEP or IGES; commercial use also requires a paid plan.
Questions
How much does Simpel3D cost?
The Free plan costs nothing. Day Pass costs $1.99, paid once, Standard costs $6.99 a month, and Pro costs $12.99 a month. Annual options are Standard Annual at $69 a year and Pro Annual at $99 a year.
What formats does it convert?
It accepts STEP, IGES, STL, OBJ, and 3MF, and outputs STL, OBJ, or 3MF. It does not convert back to STEP or IGES.
Does Simpel3D have a free plan?
Yes. It allows three conversions per day, STEP files up to 10MB, and personal use.
Can it be used for commercial work?
The Free plan is personal use only. Standard and Pro plans include commercial use.
Which platforms does it support?
Simpel3D is available on the web, with conversion running in the browser using WebAssembly according to the site.
What does the Pro plan add?
Pro includes unlimited conversions, STEP files up to 60MB, batches of five files, commercial use, and a privacy certificate.
Facts from Simpel3D's own pages
- Audience
- The site describes Simpel3D as made for makers and says the free tier is for personal use, while Standard and Pro include commercial use. · simpel3d.com, 8 Oct 2026
- Format limit
- Simpel3D does not support conversion back to STEP or IGES. · simpel3d.com, 8 Oct 2026
- Large assemblies
- Large STEP assemblies can be split automatically into individual printable parts and downloaded as a ZIP. · simpel3d.com, 8 Oct 2026
- Local processing
- The site says conversion runs locally in the browser using WebAssembly, and files are not uploaded to its servers. · simpel3d.com, 8 Oct 2026
- Mesh health
- After conversion, the tool reports watertight status, dimensions, triangle count, and volume. · simpel3d.com, 8 Oct 2026
- Payment and hosting
- The privacy policy names Paddle for payment processing, Cloudflare Pages for hosting, and JSDelivr for delivery of the WebAssembly library. · simpel3d.com, 8 Oct 2026
- Privacy and data
- The privacy policy says it collects no analytics and does not collect IP addresses; the daily conversion counter is stored in browser localStorage. · simpel3d.com, 8 Oct 2026
- Purpose
- Simpel3D converts 3D files including STEP, IGES, STL, OBJ, and 3MF into STL, OBJ, or 3MF output. · simpel3d.com, 8 Oct 2026
- Slicer compatibility
- The site says its output is tested in Cura, PrusaSlicer, and Bambu Studio. · simpel3d.com, 8 Oct 2026
- Support
- The privacy policy provides an email contact for support and says it will respond to rights requests within 30 days. · simpel3d.com, 8 Oct 2026
Where Simpel3D stands on Freedom251
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