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STEPSVG · PDF · PNG

From STEP file to technical illustration

Exact hidden lines from the CAD geometry, exploded views that come apart without collisions, balloons and parts lists. Exported as SVG, vector PDF or PNG.

placements
91
items
16
HLR passes
6
0%
Fig. 1 · leader_arm.step · iso view · 6 exact HLR keyframesThe leader arm of Alexander Koch's low-cost robot arm, with servo and frame models of our own in place of the originals. Each keyframe is the kernel's output; between them the parts slide along their explode directions. Model © 2024 Alexander Koch, MIT licence (notice).

01From STEP file to manual

One file in. Drawings, exploded views and parts pages out.

Each stage below is the studio's real output for one assembly: leader_arm.step, 91 parts in 91 placements. Nothing has been retouched.

The studio with the leader arm open: the assembly tree on the left and the 3D view.
leader_arm.step · 91 parts · 91 placements · the studio, with the dev kernel

02Vector, all the way down

Zoom in until a raster gives up.

The same drawing twice: on the left rasterised at 150 dpi, on the right the SVG the studio writes. Circles are drawn as true arcs, so they stay sharp at any size, in print and in your layout software.

Drag the divider

The NIST CTC 02 front view, magnified: concentric circles drawn as clean vector arcs.
PNG · 150 dpiSVG · vector

Measured on this SVG

True arcs
116
Circles made of straight lines
0
Circles made of Bézier curves
0
Stray fragments
0
Duplicate lines
0
File size
11.2 KB

NIST CTC 02, front view, Technical style. Our engine test measures the same things on 32 views of the NIST test parts: 0 fragments and 0 circles drawn any way but as arcs on every one. One NIST file holds only triangles and gives no drawing; that is reported as a miss.

03What it does

What an illustrator does by hand, drawn from the CAD.

Free covers single illustrations, with no watermark. Pro adds the workflow around them. Every picture is the studio's real output.

  • Hidden-line drawing of the NIST CTC 04 test part.

    Exact line art

    Free

    Hidden lines worked out from the B-rep, so arcs are arcs and nothing is left in stray pieces. Technical, Illustration or Heavy outline, with your own weights.

  • Exploded drawing of the leader arm.

    Auto-explode

    Free

    Parts pulled apart along straight lines with no collisions, then adjusted by hand, with undo.

  • The exploded leader arm with every part filled in a soft flat colour under black lines.

    Coloured parts

    Free

    Each part filled in a flat colour under its lines, for a web page or a printed insert where a picture reads better than a line drawing. Every copy of a part shares one colour. In any PNG export, and as a PDF with the lines and text kept vector over the colour; with Pro, in batch exports and the manual's PNG pages and PDF too. Visible lines only.

  • Parts list table and balloons on the leader arm parts page.

    Balloons and parts lists

    Pro

    Numbers from the assembly, shared by every drawing in a project. The list goes on the sheet and out as CSV. The leader arm's parts list (16 rows)

  • The CMYK PDF of the leader arm parts page as a PDF reader shows it.

    Print-ready PDF

    Free

    Vector PDF/A-2b, in RGB or CMYK for print. This parts page passes the veraPDF PDF/A-2b check in both (5 Oct 2026). Download it (63 KB)

  • Steps 1 to 4 of the leader arm's manual.

    Step-by-step manuals

    Pro

    Assembly steps, each with its own view and the parts it adds, laid out page after page in a PDF with bookmarks, or as one web page with a section per step for your own site. The leader arm's manual (156 KB)

  • Formats in and out

    In: STEP (.step, .stp), IGES (.iges, .igs) and Open CASCADE BREP (.brep). Mesh files such as STL can't be opened: a mesh has no exact edges to draw. Out: SVG in millimetres with one group per placed part, DXF of the lines at 1:1 in millimetres, vector PDF, and PNG at 150, 300 or 600 dpi, in line only or with the parts coloured (the PDF too). The 3D parts go out as STL, in millimetres. Manuals also go out as a single HTML page.

  • The studio reviewing a new revision of the leader arm: one part moved, every other part matched.

    Revision updates

    Pro

    When the CAD changes, the drawings, numbers and parts lists follow it instead of being redrawn.

  • The leader arm parts page with a border and a title block in an orange brand colour.

    Brand templates

    Pro

    A border and title block on every sheet, with your company, logo, colour and font. The same brand dresses the manual, and can be the default for new projects.

  • The ZIP from one batch export of the leader arm: the drawing as SVG, PDF and PNG and the parts list as CSV, beside the PDF as a reader shows it.

    Batch export

    Pro

    Every drawing of a project as PDF, SVG and PNG, the parts list as CSV and the manual as PDF, in one ZIP, made in your browser.

04Local first

Your CAD never leaves your browser.

The file is read by your browser and processed by a geometry kernel running on your machine. Projects stay in your browser's storage; every export is made on your machine.

Your computer · inside the browser

Your STEP file

read by the browser, never uploaded

Geometry kernel

Open CASCADE Technology, compiled to WebAssembly, in a background worker

Line art, PDF and PNG

drawing worker

Your projects

IndexedDB and OPFS

Your downloads

saved by your browser

Our server

Sends the pages, the app, the geometry kernel and its fonts. Nothing of your files or projects goes back to it.

  • pages, code, kernel, fonts to you
  • no upload route for your files
  • no export route: PDFs are made on your machine
  • no account needed, and no cookie without one

Check it yourself

Open your browser's developer tools and watch the Network tab while you work. The security page lists exactly what is stored where.

05Pricing

Simple plans, priced per editor.

Free stays useful: drawings of up to 250 parts, no watermark, no sign-up. Pro adds balloons, manuals, revision updates, brand templates and batch export, with a 14-day free trial. Shop Floor publishes the instructions to the line, with operator sign-off.

Every paid plan, billed each month.

Free

£0no account

  • Drawings of up to 250 parts
  • Exact hidden lines, three line styles, your own weights
  • Exploded views with explode trails
  • SVG, DXF, PDF and PNG export, no watermark
  • STL export of the 3D parts
  • 1 project kept in your browser

Pro

£29/ month, one person

After the 14-day free trial: £29 a month, or £290 a year

Start a 14-day free trial

Card required. You won't be charged until day 15. Cancel any time before then from your account and you pay nothing.

  • Your CAD never leaves your browser
  • Any number of parts and projects
  • Balloons and parts lists, on the sheet and as CSV
  • Step-by-step assembly manuals or station work instructions: steps, parts list with pictures, PDF
  • Revision updates: drawings, numbers, balloons and steps carried across when the CAD changes
  • Brand templates: title block, logo, colour and font on drawings and manuals
  • Batch export: every drawing, the parts list and the manual in one ZIP
  • Patent sheets: figures laid out to the patent office drawing rules, FIG. labels and plain reference numbers

Shop Floor Starter

£149/ month, one site, 3 editors

After the 30-day pilot: £149 a month, or £1,490 a year.

Start a 30-day pilot

No card. Add one only if you keep it; otherwise the pilot simply ends.

Pay by invoice or bank transfer
  • Everything in Pro, for 3 editors
  • Publish manuals to the shop floor: up to 15 stations, each with its own page and QR code
  • Operators sign off each revision with a name and PIN; records download as CSV
  • Problems reported from the line, emailed to the workspace owners
  • Approval before the shop floor: a second editor checks each revision and what it changes
  • Operators see what changed in each revision, torque and caution changes first, before they sign again
  • Station tablets keep working offline: sign-offs and reports are sent when the connection is back
  • Printable QR labels and station sheets with each step's parts, tools, torque and checks
  • Data capture at the station: serial numbers and measured values against your limits, kept as build records
  • A training matrix with expiry dates; require training and only trained operators sign off
  • Projects saved to your workspace and opened on any editor's computer, every save kept as a version
  • 25 GB of workspace storage in UK data centres; your CAD files are kept there only if you choose
  • Claude, if the owner turns it on: captions drafted from your notes, readable part names and translations for the stations; it never writes torque, checks or cautions

Shop Floor

£349/ month, per site, 5 editors

After the 30-day pilot: £349 a month, or £3,490 a year. Extra editors £25 a month or £250 a year.

Start a 30-day pilot

No card. Add one only if you keep it; otherwise the pilot simply ends.

Pay by invoice or bank transfer
  • Everything in Starter, with unlimited stations
  • 5 editors included; add more, and invite and remove them, from your account
  • Unlimited operators
  • 100 GB of workspace storage per site
  • Several sites from one sign-in, a read API with signed webhooks, analytics and an event-log export
  • Invoice and bank-transfer payment, on request

No VAT is charged: Galaxy Technology isn't VAT registered. Billed by Stripe. Cancel any time; your plan runs to the end of the period you've paid for.

Your CAD already holds the drawing.

Free for drawings of up to 250 parts. No account, no watermark.

Rather we drew it for you? Drawings done for you, from £150, or one drawing free to judge first.