1. [Home](https://www.toolcomb.com/) 2. [CAD Tools](https://www.toolcomb.com/cad-tools) 3. DWG/DXF Annotator # DWG/DXF Annotator - Notes, Arrows & DXF Export Load DXF (DWG with honest limits), add text notes, lines, and arrows on a canvas, then export annotated PNG or a simple DXF with TEXT/LINE - not full AutoCAD. Scoped tool: annotate overlays + DXF/PNG export - not a full AutoCAD-compatible DWG editor. ### Annotate Drop .dxf or .dwg Prefer DXF · local parse Tool Pan Text Line Arrow Note text _Note_ Undo last Clear notes Export PNG Export DXF Clear Fit Zoom in Zoom out Read-only viewers: [DXF Viewer](https://www.toolcomb.com/dxf-viewer) · [DWG Viewer](https://www.toolcomb.com/dwg-viewer) ### Canvas · pan mode ## What is a DXF annotator (not a full DWG editor)? A DXF annotator lets you open a CAD interchange drawing, place review markups, and export those notes without pretending to be AutoCAD. On ToolComb, the DWG/DXF Annotator loads DXF in the browser, draws common 2D entities on a canvas, and lets you add text notes, simple lines, and arrows as overlays. You then download an annotated PNG for stakeholders and/or a simple DXF that stores notes as TEXT and LINE entities on an ANNOTATIONS layer. People search for online DWG editor, edit DWG free, and CAD redline tool expecting move/copy/stretch of walls. That bar requires ODA-class engines and years of edge cases. Our CAD spike decision is explicit: do not ship a fake full editor. Ship annotate + DXF export, label it honestly, and keep processing local. The URL slug dwg-editor matches search intent; the H1 and body copy set the real scope. Facility managers, GC field engineers, and fabricators often need “put a note on this plan” more than they need parametric editing. Emailing a screenshot with a paint arrow loses coordinates. Exporting DXF TEXT keeps notes in a format LibreCAD and AutoCAD can reopen beside the geometry. PNG covers the non-CAD audience in the same session. DWG uploads follow the same honesty rules as the DWG Viewer. Binary DWG shows a guidance card. DXF-in-disguise opens. That prevents a “editor” that silently fails on the files users actually drag from Explorer. Prefer DXF for any markup session you care about. Overlays live in React state until export. They are not written into a proprietary DWG. If you need permanent redlines inside a BIM model, use Bluebeam, Autodesk Docs markups, or desktop CAD revision clouds. This page is the lightweight, private alternative for small teams and one-off RFIs. Entity draw coverage mirrors the viewers: LINE, LWPOLYLINE, CIRCLE, ARC, TEXT. Markups always draw on top in a high-contrast orange so they read on dark backgrounds. Fit to view recalculates from source bounds; annotations outside extents still export to DXF even if you need to pan to see them. Privacy is the differentiator versus cloud redline suites. Drawings under NDA never POST to ToolComb. Generate the DXF string in-page, download, and close the tab. Shared kiosks should Clear and empty Downloads after sessions with secure sites. Pair this annotator with the DXF Viewer for read-only checks and the DWG Viewer when intake files arrive as .dwg. Together they form a CAD Tools cluster that prefers honesty and local DXF over Autodesk-parity claims. Coordinate stability is why canvas clicks map through the current transform into world units. A note placed at a doorway stays at that doorway after Fit to view or zoom changes, which screenshot paint tools cannot guarantee. When you export DXF, those world coordinates become TEXT insert points and LINE endpoints that LibreCAD can snap near - still verify, but far better than a JPEG circle with no model units. Workflow discipline keeps markups useful. Name notes with RFI or ticket IDs, export PNG for chat and DXF for CAD, and avoid editing the authoring DWG with ad-hoc geometry just to leave a comment. Overlays communicate intent; production geometry stays in the master file under change control. If a note becomes a real design change, the architect or engineer should implement it in desktop CAD and issue a revision - this tool never replaces that step. Performance tips mirror the viewers: hide unused layers before annotating dense plans, zoom to the detail, then place arrows. Extremely heavy polylines slow both pan and click targeting. For city-scale files, ask for a cropped DXF of the work area. Twenty-five megabytes is a soft ceiling; memory pressure on low-end Chromebooks may require smaller excerpts. ## How to annotate a DXF and export notes Seven steps from load to DXF/PNG. Keep Pan mode for navigation and switch to Text/Line/Arrow only when placing markups so drags do not create accidental strokes. 1. **Load a DXF (or DWG with limits)** Upload .dxf for full annotate support. .dwg follows the same honesty as the DWG Viewer: binary DWG shows guidance; DXF-in-disguise opens. Prefer Save As DXF from AutoCAD/LibreCAD when blocked. 2. **Fit and pan the drawing** Use Fit to view, then Pan mode (or drag when pan is selected) so the area you want to mark up fills the canvas. Wheel zoom stays available. 3. **Add text notes** Choose Text, type the note, then click the canvas to place it in drawing coordinates. Notes render in orange and export as DXF TEXT on the ANNOTATIONS layer. 4. **Draw lines or arrows** Select Line or Arrow, click start point, click end point. Arrows get a filled head on PNG and two short head segments in the DXF export. 5. **Export annotated PNG** Download a snapshot of the current view with markups for email or slides. Filenames include a _toolcomb suffix. 6. **Export simple DXF** Export DXF writes a minimal ASCII file with optional original LINE/CIRCLE/LWPOLYLINE/TEXT plus your annotations as TEXT/LINE. It is not a round-trip DWG and not full AutoCAD parity. 7. **Clear when finished** Clear removes the drawing and all overlays from memory. Nothing was uploaded to ToolComb servers during the session. ## Before and after: field RFI on a floor plan ### Before A superintendent photographed a printed plan, circled a doorway in marker, and texted the photo. The architect could not tell which grid intersection was meant. A second visit was scheduled. The DXF lived only on the office CAD seat, so field staff had no way to drop a coordinate-stable note. ### After The office exported DXF, opened it in the annotator on a laptop, placed a text note “Confirm door swing - RFI 14” with an arrow to the opening, exported PNG to the group chat and DXF back to the architect. The TEXT entity appeared on ANNOTATIONS in LibreCAD the same afternoon. No Bluebeam seat was required for that single RFI. Use PNG for chat, DXF for CAD peers, and keep source DWG masters untouched. Clear annotations between RFIs so leftover arrows do not travel into the wrong export. Verify DXF in desktop CAD before issuing formal revision sets. When multiple reviewers mark up the same plan, agree on a note prefix convention (initials + date) so TEXT entities remain attributable after merges. If two DXF annotation exports must combine, open them as xrefs or copy entities in LibreCAD rather than pasting PNGs on top of each other. ## When annotate + DXF export helps ### 1. Field RFIs and punch notes Drop text and arrows on a plan DXF, send PNG to the crew chat, and DXF to the designer. ### 2. Fabricator clarification markups Highlight hole locations or tab concerns without editing the nested geometry itself. ### 3. Student peer review Classmates annotate homework DXFs and return notes as DXF TEXT the teacher can grade beside the model. ### 4. Sales redlines on layouts Mark proposed equipment pads on a customer DXF under NDA without uploading to a SaaS markup tool. ### 5. Facilities work orders Circle the broken diffuser on an as-built DXF and attach PNG to the CMMS ticket. ### 6. Permit comment responses Answer plan-check comments with numbered text notes exported for the resubmittal package. ### 7. Vendor kickoff packages Annotate “use revision C outline” on a shared DXF so CAM starts from the right profile. ### 8. Meeting whiteboard substitute During a video call, place arrows live and export PNG into the meeting notes. ### 9. Archive commentary Add dated TEXT notes to legacy DXFs explaining why a detail was superseded. ### 10. Handoff between tools Viewers confirm geometry; this page adds the human commentary layer and writes it back as DXF so the next person can open notes in CAD instead of guessing from a compressed chat image. ## Markup options compared Pick based on whether you need BIM-grade redlines, local privacy, or a DXF round-trip of notes. | Option | Edits geometry? | Exports | Best for | | --- | --- | --- | --- | | ToolComb Annotator | No (overlays only) | PNG + simple DXF | Private quick redlines | | AutoCAD / BricsCAD | Yes | DWG/DXF/plots | Production editing | | Bluebeam / PDF markups | On PDF sheets | PDF | Construction document sets | | Cloud CAD markups | Varies | Vendor formats | Teams already in that suite | | Paint on screenshots | No | Raster only | Throwaway chat only | Use ToolComb when you need local overlays and a DXF note round-trip without a CAD license. Escalate to desktop CAD or Bluebeam when contracts require sealed document workflows. Do not treat annotated PNG as a construction change order by itself. A healthy habit is to paste the PNG into the ticket and attach the DXF as the machine-readable twin so nothing is lost when chat compresses images. ## Limits and tips - Scoped to annotate + PNG/DXF export - not a full DWG/DXF geometry editor. - Native DWG binaries are not editable; convert to DXF first. - DXF export is a minimal subset (TEXT/LINE/CIRCLE/LWPOLYLINE) - verify in CAD. - No hatch, dimension, or block authoring. - Undo is last-annotation only in v1. - Text height is a simple world-unit value; fonts are CAD-default on reopen. - File size soft limit ~25 MB. - Not affiliated with Autodesk. - Paper-space viewports are not authored; work in model-space DXF exports. - Arrow heads in DXF are approximate line pairs - style them further in desktop CAD if needed. ## Privacy for markups and drawings Source files and annotation state stay in the browser. ToolComb does not host your redlines. Downloaded DXF/PNG are ordinary local files - protect them like any project document. Clear the tool on shared machines after marking up sensitive sites. Annotation text can contain client names or security notes - treat the exported DXF with the same controls as the source drawing. Because nothing uploads mid-session, offline laptops can still complete markups after the page is cached by your browser - ideal for field trailers with flaky Wi-Fi once the app shell has loaded. ## Frequently Asked Questions ### Is this a full DWG editor like AutoCAD? No. Marketing it as a full DWG editor would be dishonest. This tool is an annotator: load DXF geometry, overlay text notes, lines, and arrows, then export annotated PNG or a simple DXF subset. You cannot stretch walls, edit block attributes, manage xrefs, or save native DWG. ### What does DXF export include? A minimal HEADER/TABLES/ENTITIES ASCII DXF. Annotations become TEXT and LINE entities on layer ANNOTATIONS (arrows add head lines). Optionally, original LINE, CIRCLE, LWPOLYLINE, and TEXT entities from the loaded drawing are copied. Hatches, dimensions, and blocks are not rewritten. ### Can I edit native DWG entities? No. Native binary DWG is not decoded into editable entities here. Convert to DXF first. Overlays sit in app state until you export - they are not written into a DWG binary. ### Does annotation data leave my browser? No. Parsing, drawing, and DXF string generation run locally. Only files you choose to download hit disk. ### How do I place a text note accurately? Enter the note text, select Text mode, click once on the canvas. The click maps through the current pan/zoom into world coordinates so notes stay aligned when you Fit again before export. ### Can I undo a markup? Use Undo last in the annotations list controls, or Clear all annotations. Full multi-step history is not implemented in v1. ### Will exported DXF open in LibreCAD? Yes for the simple subset we write (TEXT/LINE/CIRCLE/LWPOLYLINE). Complex fonts, styles, and paperspace are not preserved. Open and verify before production use. ### Why is PNG export useful if I have DXF? Owners and PMs often cannot open DXF. Annotated PNG carries the redline visually for Slack or PDF packs while DXF carries geometry for CAD peers. ### What file size is supported? About 25 MB for the source drawing. Extremely dense files may slow overlay interaction; hide work by simplifying upstream or cropping exports from a zoomed view. ### Is the annotator free? Yes - free, no account, scoped to markup + DXF/PNG export. For production CAD editing use LibreCAD, AutoCAD, or your BIM suite. ## Related CAD tools - [DXF Viewer](https://www.toolcomb.com/dxf-viewer) - Read-only pan/zoom/PNG without markups. - [DWG Viewer](https://www.toolcomb.com/dwg-viewer) - Honest DWG intake + DXF path. - [Text on Image](https://www.toolcomb.com/text-on-image) - Raster captions when you only have PNG. - [Blur & Redact](https://www.toolcomb.com/blur-redact-image) - Hide sensitive areas on exported PNGs. - [Diff Checker](https://www.toolcomb.com/diff-checker) - Compare DXF text exports side by side. - [Metadata Remover](https://www.toolcomb.com/metadata-remover) - Clean PNG metadata before public posts. ## Related Tools Discover more free tools that might help with your next task. [DXF Viewer Open DXF drawings with pan, zoom, layers, and PNG export Use Tool](https://www.toolcomb.com/dxf-viewer) [DWG Viewer Preview DWG/DXF files locally with honest format limits Use Tool](https://www.toolcomb.com/dwg-viewer) ### Related guides Read the how-to, then come back to this tool when you are ready to run it locally. - [Why Native DWG Still Needs Desktop CAD Browser DWG limits: proprietary binary, version churn, and honest UX vs fake viewers - when to export DXF and what ToolComb can still preview.](https://www.toolcomb.com/blog/why-native-dwg-needs-desktop-cad) - [DXF vs DWG in the Browser - What ToolComb Can Open When to use the DXF viewer vs the DWG viewer, what native DWG cannot do in-tab, and how STL preview fits the same CAD hub - honest entity limits, no upload.](https://www.toolcomb.com/blog/dxf-vs-dwg-in-the-browser) [View All Tools](https://www.toolcomb.com/tools)