How is this different from Compress PDF?
Advanced PDF Compression uses server-side Ghostscript; the normal tool runs on-device with safe re-save and raster options.
pdf tool · Secure server processing
Advanced PDF Compression
Compress large PDFs with FileLume Pro server processing.
The document is uploaded over HTTPS for this operation. Temporary working files are deleted when the request finishes, including failed requests.
Accepted input
Secure server processing
The document is uploaded over HTTPS for this operation. Temporary working files are deleted when the request finishes, including failed requests.
Access
No account required for core tools
Formats: PDF
Privacy: Secure server processing. The document is uploaded over HTTPS for this operation. Temporary working files are deleted when the request finishes, including failed requests. The private PDF worker uses structural PDF optimization and owned image re-encoding. An optional Ghostscript fallback remains disabled unless both operational and licensing release gates are approved. Source and output files are not added to FileLume product storage. The current server limit is 200MB per file.
Outcome: Compress large PDFs with FileLume Pro server processing.
Choose files
Tap to choose from Files.Click to browse, drag and drop multiple files.
Supported: PDF · Outcome: Compress large PDFs with FileLume Pro server processing.
Limits: Up to 20 files · 200 MB per file · 1 GB total
The document is uploaded over HTTPS for this operation. Temporary working files are deleted when the request finishes, including failed requests.
Settings
Strong defaults are selected. Open Advanced only when you need more control.
Named presets
Save, duplicate and edit recurring jobs locally. No account, file, filename, or file content is stored.
Helpful details before processing
Upload a PDF to FileLume Pro so server-side Ghostscript can perform stronger compression than the normal on-device PDF tool.
Technical details · Reviewed 2026-07-13
What this tool does
Upload a PDF to FileLume Pro so server-side Ghostscript can perform stronger compression than the normal on-device PDF tool.
How it works in FileLume
- The selected PDF is uploaded over HTTPS to the FileLume processing service.
- Ghostscript runs inside the service to create the compressed PDF response.
- The current server limit is 500MB per file. The file is uploaded over HTTPS for the requested operation, and temporary working files are deleted when the request finishes, including failed requests.
Best for
- Compressing larger PDFs that exceed comfortable browser memory limits.
- Trying stronger server-side optimization after the normal Compress PDF tool produces limited savings.
- Reducing image-heavy or scanned documents before transfer or upload.
Format and quality guidance
- Keep the original PDF because stronger compression can reduce image clarity or alter complex content.
- Open the output and check small text, forms, page count, links, and visual quality before relying on it.
Trade-offs to expect
- Stronger compression can produce better size reduction but may introduce visible quality loss.
- This operation requires a server upload and Pro access.
Limitations
- Already optimized, mostly text, encrypted, damaged, or unusual PDFs may show limited savings or fail.
- The smallest possible file is not guaranteed because PDF structure and image content vary.
Common errors and fixes
- The PDF did not shrink enough.
- Remove unnecessary pages or reduce source scan resolution; some documents are already optimized.
- Images look softer.
- Keep the original and use a less aggressive compression path when clarity matters.
- The PDF cannot be processed.
- Confirm the file opens normally, is not password-protected, and is below the current server limit.
Advanced PDF Compression FAQ
Is an exact output size guaranteed?
No. The result depends on the PDF structure and embedded content.
How are files handled?
The PDF is uploaded over HTTPS for this operation, and temporary working files are deleted when it finishes.