AutoCAD Version Converter
Detect the AutoCAD version of any DWG or DXF file and convert it to a target release — R12 (1992) through R2018 — entirely in your browser, completely free.
Why convert AutoCAD versions with AnyDocFlow?
Instant version detection
Reads the DWG binary header or the DXF $ACADVER variable to identify the exact AutoCAD release — no CAD software needed.
Downgrade for compatibility
Convert R2018 drawings to R2000, R12 and every version in between so older CAD software, viewers, and CNC machines can open them.
DWG and DXF support
DXF files are rewritten in place with a lossless version change; DWG files are exported as the matching target-version ASCII DXF.
No upload, fully private
Detection and conversion run locally in your browser with WebAssembly. Your drawings never leave your device.
Batch conversion
Drop up to 10 drawings at once and convert them all automatically, then download each file or grab a single ZIP.
Free, no sign-up
No accounts, no trial limits, no watermark — the complete tool is free to use.
What is an AutoCAD version conversion?
AutoCAD drawings carry a version marker. DWG files store it as an ASCII code in the binary header — AC1015 is AutoCAD 2000, AC1027 is AutoCAD 2013, AC1032 is AutoCAD 2018 — while ASCII DXF files store it as the $ACADVER header variable. Newer versions add features older releases cannot open, so files sometimes need to be downgraded for legacy CAD packages, third-party viewers, and CNC machinery. This tool detects the version of any DWG or DXF file and converts it to a target release you choose. Because ASCII DXF is plain text, converting a DXF between versions is an exact, lossless rewrite of the header — every entity, layer, and block stays identical. DWG inputs are exported as the matching target-version DXF, the most universally compatible CAD interchange format.
How to convert an AutoCAD version
Three simple steps — no account, no software, no upload.
Pick a target version
Choose the AutoCAD release you need — from R12 (1992) to R2018. R2000 is the most widely compatible default.
Drop your DWG or DXF
Drag and drop up to 10 drawings. Conversion starts automatically and runs entirely in your browser.
Download the result
Grab each converted file individually or download them all in one ZIP. Your source files are never uploaded.
A note on DWG vs DXF conversion
DWG is a closed binary format with no in-browser writer available, so a .dwg input is exported as the matching target-version ASCII DXF rather than being rewritten in place — every CAD program, viewer, and CNC controller reads any version of ASCII DXF. DXF inputs, in contrast, get a lossless $ACADVER rewrite. For a handful of DWG versions (notably AC1024/AC1027), the in-browser exporter also truncates the output — such jobs still download, but the card shows an amber warning so an incomplete result is never mistaken for a clean convert.