"A client sent me the drawing as a PDF, but I need to edit it in DWG (AutoCAD format)." It's one of the most common headaches in any CAD workflow. PDF is great for sharing and printing—but you can't edit its lines, dimensions, or text.

This guide shows you two reliable ways to convert PDF to DWG: a free online converter (no software) and AutoCAD's built-in PDFIMPORT. More importantly, it explains the two things that ruin most conversions—the scale problem and vector vs. raster PDFs—so your converted file is actually usable.

目次

• Before You Convert: Vector vs. Raster PDF
• Method 1: Convert PDF to DWG Online (Free, No Software)
• Method 2: Import a PDF into AutoCAD (PDFIMPORT)
• Getting the Scale Right (the #1 Problem)
• Which PDFs Convert—and Which Don't
• FAQ
• Convert PDF to DWG, DXF, or JWW in Seconds with DARE

Before You Convert: Vector vs. Raster PDF

The single biggest factor in conversion quality is whether your PDF is vector or raster. Understanding this up front saves you from the classic "why won't the lines come through?" frustration.

• Vector PDF — Created by "printing" or "exporting to PDF" from CAD software (AutoCAD, Jw_cad), Illustrator, and similar tools. Lines, circles, and text are stored as math, so they can be rebuilt as editable CAD objects when converted to DWG.
• Raster PDF — A scanned paper drawing, or a PDF with a photo/image pasted inside. The content is just a grid of pixels, so it has no line data. Converting it requires a separate "image-to-CAD" (vectorization) step, not a simple format conversion.

In short: a vector PDF exported from CAD software converts cleanly, while a scanned PDF needs a converter's image-to-CAD (vectorization) feature.

Method 1: Convert PDF to DWG Online (Free, No Software)

If you don't own AutoCAD, or you just need to convert a single file right now, a browser-based free converter is the fastest route. The steps are the same across most services:

1. Open an online service that supports PDF to DWG conversion.
2. Upload the PDF file you want to convert.
3. Choose DWG (or DXF) as the output format.
4. Run Convert and download the generated DWG file.
5. Open it in AutoCAD (or your CAD app) and check the lines, dimensions, and scale.

Most of these tools need no installation and no sign-up. The trade-off is accuracy: free converters often produce garbled text, dimension drift, flattened layers, or simply fail on raster PDFs. The more important the drawing, the more carefully you should verify the scale and dimensions afterward.

Method 2: Import a PDF into AutoCAD (PDFIMPORT)

If you're running AutoCAD 2017 or later, the built-in PDFIMPORT command brings a PDF straight into your drawing:

1. Launch AutoCAD, type PDFIMPORT on the command line, and press Enter.
2. Select the PDF file to import.
3. Specify the page, scale, insertion point, and what to import (vector geometry, solid fills, text, raster images).
4. Confirm, and the PDF content is placed as native AutoCAD objects (lines, polylines, text).

PDFIMPORT turns a vector PDF into native AutoCAD geometry, giving you more control than a generic online converter. One caveat: text drawn with SHX fonts (AutoCAD's own fonts) is imported as line work and may not be editable as real text.

Getting the Scale Right (the #1 Problem)

By far the most common conversion issue is that the scale comes out wrong. A PDF only stores the size on the sheet—it loses the real-world scale (1:100, etc.) of the original drawing.

The fix is to use one known dimension to rescale the whole drawing:

1. In the converted DWG, pick one length you know (e.g., a 6000 mm grid spacing, an 800 mm door width).
2. Measure that segment's current length.
3. Run the SCALE command with the Reference option, scaling from the measured length to the true length (e.g., current length → 6000).
4. Measure a second known dimension to confirm there's no remaining drift.

When using PDFIMPORT, if you know the scale the original PDF was created at, enter it in the scale field during import to save yourself this cleanup later.

Which PDFs Convert—and Which Don't

Source PDF	Convertible?	Notes
Vector PDF exported from CAD	◎ High accuracy	Lines, text, and dimensions rebuild as editable objects
Vector PDF from Illustrator, etc.	○	Lines come through, but not as CAD-style layers
Scanned paper drawing (raster PDF)	△ Needs vectorization	Requires an image-to-CAD (trace) feature
PDF that's just a pasted photo/image	△–×	Depends on image-recognition (vectorization) quality

To turn a scanned PDF or paper drawing into DWG, you need a service that supports raster-to-vector conversion (image-to-CAD), not just a plain format converter.

And if the converted DWG won't open in an older AutoCAD, you'll need to lower its version. → How to Convert AutoCAD (DWG) to a Lower Version

FAQ

Q. Can I convert PDF to DWG without AutoCAD?
A. Yes. A browser-based free online converter will turn a PDF into DWG or DXF with no software to install.

Q. The text in my converted DWG isn't editable. Why?
A. If the original PDF used SHX fonts or outlined text, it's imported as line work. To get editable text, use a converter with OCR (text recognition), or retype it.

Q. Can I convert a scanned paper drawing to DWG?
A. Not with a standard PDF-to-DWG conversion. You need an "image-to-CAD" (vectorization) feature designed for scanned drawings.

Convert PDF to DWG, DXF, or JWW in Seconds with DARE

DARE is a cloud CAD conversion service that runs entirely in your browser—no heavy software to install. It handles PDF to DWG / DXF, DWG ⇔ JWW, and even downgrading to an older AutoCAD version, all online.

Stop fighting with files that won't open or formats that don't match. Try DARE's Free CAD Converter and make sharing CAD drawings effortless.