Three-d format
STEP Sample Files
STEP (.step, .stp) files represent CAD product data in ISO 10303 exchange syntax, supporting part geometry, assemblies, and manufacturing handoff. Use sample STEP files to validate CAD importers, assembly exchange, and product-data interoperability across engineering tools.
3 files
All to 50KB
SHA256 verified
Manifest included
Quick facts
Files first
STEP Sample Files — Download
Use cases
STEP Testing Workflows
Use the file table first, then branch into compare or FAQ only if the task needs more context.
Compare and decide
STEP Format Comparisons
FAQ and reference
STEP File FAQ
Checksum Verification
Use checksums to confirm file integrity after download.
shasum -a 256 your_file_name_here
# Compare output with SHA256 values listed above.Where is the machine-readable manifest?
Use the manifest when you need stable names, SHA256 values, and URLs for automation.
Use in code — curl, Python, Node, wget
Copy any snippet directly into scripts, test suites, or CI pipelines. All URLs are stable and publicly accessible with no auth required.
# Download step_assembly_exchange_sample.step
curl -L -o step_assembly_exchange_sample.step \
https://samplefile.com/samples/download/three-d/step/step_assembly_exchange_sample.step/
# Or fetch a random STEP file
curl -s "https://samplefile.com/samples/api/random?format=step" | jq -r '.download_url'# Download step_assembly_exchange_sample.step
wget -O step_assembly_exchange_sample.step \
https://samplefile.com/samples/download/three-d/step/step_assembly_exchange_sample.step/import requests
# Download a specific file
url = "https://samplefile.com/samples/download/three-d/step/step_assembly_exchange_sample.step/"
resp = requests.get(url)
with open("step_assembly_exchange_sample.step", "wb") as f:
f.write(resp.content)
# Or fetch a random STEP file via API
meta = requests.get("https://samplefile.com/samples/api/random?format=step").json()
resp = requests.get(meta["download_url"])
with open(meta["name"], "wb") as f:
f.write(resp.content)// Download a specific file
const fs = require("fs");
const https = require("https");
const url = "https://samplefile.com/samples/download/three-d/step/step_assembly_exchange_sample.step/";
https.get(url, (res) => {
res.pipe(fs.createWriteStream("step_assembly_exchange_sample.step"));
});
// Or fetch a random STEP via the API
const meta = await fetch("https://samplefile.com/samples/api/random?format=step").then(r => r.json());
const file = await fetch(meta.download_url);
// use file.arrayBuffer(), file.body, etc.# Random STEP file (JSON response)
GET https://samplefile.com/samples/api/random?format=step
# All STEP files
GET https://samplefile.com/samples/api/files?format=step
# Manifest with SHA256 checksums
GET https://samplefile.com/samples/three-d/step/manifest.json
# Response includes: name, size_bytes, mime_type, sha256, download_urlValidation Methodology
- Validate extension and MIME detection before processing.
- Benchmark performance with small and larger files.
- Test malformed-input handling and error messaging.
Fixture Matrix
Use the curated STEP matrix to choose the right clean, edge-case, and broken fixtures for this format.
Open Matrix
Workflow Packs