How to Clean AutoCAD & Autodesk WebServices Cache & .ac$ Temp
Location & Quick Verdict
%LocalAppData%\Autodesk\Web Services and %Temp%
AutoCAD, Revit, and Fusion 360 leave behind temporary drawing lock files (.ac$, .sv$) and Autodesk Desktop App installer caches.
How Timeline Previews, Conform Audio & Render Scratch Fill AutoCAD & Autodesk WebServices Cache & .ac$ Temp
Non-linear video editors (NLEs), streaming encoders, 3D DCC tools, and DAWs continuously write uncompressed audio conform files (.cfa), waveform peak indexes (.pek), proxy transcodes, and frame-accurate undo scratch into %LocalAppData%\Autodesk\Web Services and %Temp%. Even after you finish exporting and archiving a client project, gigabytes of intermediate timeline render caches remain permanently allocated on your scratch disk.
On 4K/8K timelines or multi-scene streaming setups, AutoCAD & Autodesk WebServices Cache & .ac$ Temp routinely consumes 2.0 GB – 15.0 GB of high-speed SSD space. Safely pruning stale media caches reclaims scratch bandwidth immediately; if you ever reopen an older project file, the application simply regenerates audio waveforms and timeline previews in the background.
# Inspect current disk footprint of AutoCAD & Autodesk WebServices Cache & .ac$ Temp (Read-Only)
$target = "$env:LOCALAPPDATA\Autodesk\Web Services"
Get-ChildItem -Path $target -Recurse -Force -ErrorAction SilentlyContinue |
Measure-Object -Property Length -Sum |
Select-Object Count, @{Name="SizeGB";Expression={[math]::Round($_.Sum / 1GB, 2)}}
Manual Cleaning Instructions
- 1 Save all drawings and exit AutoCAD/Autodesk apps.
- 2 Press Windows Key + R, type %temp% and press Enter.
- 3 Delete stale .ac$ and Autodesk installer staging folders.
Note: If Windows alerts that a file is in use or locked by a background process, close the associated task in Task Manager before deleting, or use SWEEPR Cleaner to release locked handles safely.
Sub-Folders & Cache Locations Breakdown for AutoCAD & Autodesk WebServices Cache & .ac$ Temp
Modern Windows applications and system services split their disk footprint across multiple sub-directories (`Cache_Data`, `Service Worker\CacheStorage`, `Code Cache`, `GPUCache`, and `Crashpad\reports`). Review which sub-folders inside AutoCAD & Autodesk WebServices Cache & .ac$ Temp are safe to purge and which files remain protected:
| Sub-Folder / Cache Location | Storage Role | Typical Footprint | Deletion Safety |
|---|---|---|---|
| %LocalAppData%\Autodesk\Web Services | Primary Media Cache, Proxy Scratch & Render Previews | 2.0 GB – 15.0 GB | 🟢 100% Safe (Re-renders on Demand) |
| %LocalAppData%\Autodesk\Web Services\Media Cache Files (*.cfa, *.pek) | Conformed Audio Waveforms & Timeline Peak Files | 2.0 GB – 25.0 GB | 🟢 100% Safe |
| %LocalAppData%\Autodesk\Web Services\GPUCache & Code Cache | Hardware-Accelerated Viewport & UI Plugin Cache | 300 MB – 3.0 GB | 🟢 100% Safe |
| %LocalAppData%\Autodesk\Web Services\logs & Crashpad\reports | Render Session Logs & Crash Dump Archives (.dmp) | 200 MB – 4.5 GB | 🟢 100% Safe |
| Project Timelines (.prproj / .drp / .blend) & LUTs | Source Footage, Edit Timelines, Presets & Exported Renders | Protected | 🔒 Protected — Never Touched |
Frequently Asked Questions
Is it safe to delete AutoCAD & Autodesk WebServices Cache & .ac$ Temp?
Yes, 100% safe. Safe to clean when all Autodesk applications are closed.
How much storage space will cleaning AutoCAD & Autodesk WebServices Cache & .ac$ Temp free up?
Users typically reclaim 2.0 GB – 15.0 GB on Windows 10 and Windows 11 systems depending on update frequency and active cache retention in %LocalAppData%\Autodesk\Web Services and %Temp%.
Will clearing AutoCAD & Autodesk WebServices Cache & .ac$ Temp delete my video projects, drafts, or saved recordings?
No. Project timelines, source media clips, and exported videos are stored in your project folders—not in %LocalAppData%\Autodesk\Web Services and %Temp%. If you reopen an active project after cleaning, the software automatically rebuilds any needed waveform peaks or preview frames.
Where is AutoCAD & Autodesk WebServices Cache & .ac$ Temp located on Windows 10 and Windows 11?
It is stored at %LocalAppData%\Autodesk\Web Services and %Temp%. You can paste that path directly into the Windows Run dialog (Win + R) or File Explorer address bar to inspect it.
Manual File Explorer vs. 1-Click SWEEPR Cleanup
| Feature | Manual Deletion | SWEEPR Cleaner |
|---|---|---|
| Locked File Handling | Fails on locked processes | Safe background release |
| Accidental Deletion Risk | Moderate (easy to delete wrong folder) | Zero (strict rules & hashes) |
| Safety Undo Rollback | None (Shift+Del is permanent) | 7-Day Automatic Rollback |
| Time Required | 10–20 minutes per app | < 60 seconds across 40+ areas |
Related Windows Cleanup Guides & Hidden Space Hogs
Clean AutoCAD & Autodesk WebServices Cache & .ac$ Temp Automatically
SWEEPR Cleaner safely clears AutoCAD & Autodesk WebServices Cache & .ac$ Temp along with 40+ other hidden app folders and leftover files in one click—covering up to 5 devices (Windows, Mac, Android & iOS) with a 7-day undo safety net.