Fix PDF Printing Stuck in Print Queue — Won't Print or Cancel
A PDF stuck in the print queue that won't print or cancel is a print spooler issue. Here's how to force-clear the queue and prevent it from happening again.
A PDF print job stuck in the queue — showing "Deleting" forever, or refusing to cancel — is a Windows Print Spooler problem, not a PDF problem. The spooler service locked on the job and can't release it. Standard "cancel" doesn't work because the spooler process itself is frozen. This requires stopping the service to force-clear the queue.
The Three-Step Force-Clear (Windows)
This procedure clears any stuck print queue on Windows. Step 1: Press Win+R, type net stop spooler and press Enter — this stops the Print Spooler service. Step 2: Open File Explorer and navigate to C:\Windows\System32\spool\PRINTERS — delete all files in this folder (leave the folder itself). These are the stuck job files. Step 3: Press Win+R again, type net start spooler and press Enter to restart the service. Open your print queue — it should now be empty. Try printing again.
Force-Clear on Mac
On Mac: open System Settings → Printers & Scanners. Right-click (or Control+click) on your printer in the left list. Select "Reset printing system." This clears all queued jobs and removes and re-adds all printers. You'll need to re-add your printer after: click the "+" button in Printers & Scanners and add it again. This is more disruptive than the Windows approach but is similarly reliable at clearing completely stuck jobs. After re-adding, try printing again.
Why PDF Print Jobs Get Stuck
PDFs with transparency, large file sizes (over 50 MB), complex vector graphics, or embedded fonts the print driver doesn't recognise create oversized PostScript spool files. The spooler sometimes fails writing these large spool files and locks. To prevent recurrence: (1) Flatten transparency before printing with FixMyPDF's flatten tool — this dramatically reduces spool file size. (2) Compress large PDFs before printing. (3) In Adobe Reader's print settings, check "Print as Image" for complex documents — this converts to a simple bitmap that spools reliably.
If the Queue Gets Stuck Again Immediately
If print jobs keep getting stuck on the same printer, the driver is likely incompatible with certain PDF content. Try: (1) Update the print driver from the manufacturer's website. (2) Switch between PostScript and PCL driver variants if both are available. (3) Print using a different application — if Adobe Reader always jams but Chrome doesn't, use Chrome as your PDF printing app. (4) For network printers, the issue may be on the print server — have IT check spooler health on the server.
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