Free online GERBER to DXF converter

A PCB fabrication package may contain Gerber artwork while a mechanical-CAD, laser-cutting, or CNC application requires editable DXF geometry. Conversion makes board outlines, copper shapes, or other plotted layers measurable and editable, but it does not recreate the original PCB design database.

What the Gerber format is

Gerber is the plotted-artwork format used to manufacture printed circuit boards. PCB tools such as KiCad, Altium Designer, Autodesk Fusion Electronics, EAGLE, OrCAD, PADS, and EasyEDA export separate files for copper, solder mask, silkscreen, solder paste, and the board outline.

Modern files generally use RS-274X or Gerber X2. RS-274X stores drawing commands and aperture definitions; X2 adds attributes such as layer function when the producing and reading tools support them. Common extensions include .gbr, .ger, and .pho, but the filename alone does not prove the file type.

Gerber describes the plotted appearance of one manufacturing layer. It does not contain the complete editable PCB layout, schematic, component library, netlist, design constraints, or manufacturing drill data. Excellon drill files are normally supplied separately.

What the DXF format is

DXF, or Drawing Exchange Format, is Autodesk's interchange format for CAD entities. AutoCAD, DraftSight, BricsCAD, QCAD, LibreCAD, and many mechanical-CAD, CNC, and laser-cutting applications can open it. A Gerber conversion normally produces 2D DXF entities such as lines, arcs, polylines, circles, and closed profiles.

DXF is useful for dimensioning a board, combining its outline with a mechanical drawing, editing plotted shapes, checking clearances, or preparing geometry for another CAD-based process. It is not a replacement for fabrication Gerbers: it may omit aperture behavior, polarity, X2 attributes, photoplotter interpretation, and other manufacturing information.

How to convert Gerber to DXF

FlatCAM is a practical desktop choice because it imports Gerber artwork and can export vector geometry without rasterizing it. Menu names differ between FlatCAM releases and community builds.

1. Extract the fabrication package and identify the required Gerber file. Keep the Gerber job file, fabrication notes, and any legacy aperture file available for confirming layer identity and units. RS-274X normally contains its aperture definitions internally.
2. Open the Gerber in FlatCAM using the Gerber import command, commonly File → Open Gerber. Import the board-outline layer for an outline-only DXF. Import copper, mask, paste, or silkscreen files separately when those shapes are required.
3. Check the displayed dimensions, coordinate origin, unit system, polarity, apertures, arcs, flashes, and filled regions against a trusted Gerber viewer or the fabrication documentation. A millimetre/inch interpretation error changes the scale by 25.4.
4. If the release requires an intermediate object, create a FlatCAM geometry object from the imported Gerber. Select the relevant Gerber or geometry object and use the available DXF export command, commonly under File → Export or an object context menu.
5. Save separate files for separate source layers unless the receiving CAD system specifically needs a combined drawing. If the exporter supports DXF versions, use a broadly compatible version such as R12 when the target application has limited entity support.
6. Open the DXF in the target CAD program and measure a known board dimension or mounting-hole spacing. Check the origin, 1:1 scale, closed profiles, arc geometry, and the visibility of filled regions before editing or generating toolpaths.

For repeated or tightly controlled CAM work, commercial systems such as CAM350 and UcamX can provide more explicit control over units, polarity, aperture interpretation, layer mapping, and output entities. Their output still requires dimensional verification.

For a conversion without installing software, the file can be uploaded to the free Gerber-to-DXF converter on 101convert.com; inspect the downloaded DXF in a CAD application before using it.

Drill files and multiple layers

Excellon files are not Gerber layers and must be imported separately when hole locations or diameters are needed. Use a tool that can import Excellon and export drill centers or circles, or obtain a DXF export from the original PCB design system. Confirm whether the drill file uses inches or millimetres and whether tool diameters become circles, points, or annotations.

Separate DXF files are the safest way to preserve layer identity. If the converter supports CAD layers, assign explicit names such as Top_Copper, Board_Outline, and Drill_Centers. Do not combine every copper, mask, and silkscreen layer for an outline-only mechanical drawing; overlapping filled geometry can make the DXF unnecessarily large and difficult to edit.

Quality and compatibility limits

• Conversion preserves artwork, not design intent. Nets, footprints, component references, constraints, drill attributes, and schematic relationships cannot be recovered from Gerber alone.
• Flashes, custom apertures, rounded rectangles, and regions may become circles, arcs, hatches, closed polylines, or many short segments. The result may look correct while having different editability, entity counts, and file size.
• Polarity must be checked manually. A negative Gerber layer can export as ordinary geometry without retaining the instruction that it was negative; the converter may need to render the final visible shape before export.
• Verify units, scale, origin, coordinate precision, polygon closure, arc direction, and fill behavior. Some CAD programs display closed profiles with missing or reversed fills even when their coordinates are correct.
• Compare the DXF with the original Gerber in a Gerber viewer and retain the complete Gerber and Excellon package for fabrication and verification. Do not use the converted DXF as the sole manufacturing check.