PDF Compressor
Downsample and recompress embedded photos, remove unused objects and compress streams. Savings depend on the PDF: image-heavy files shrink most.
Select a file for PDF Compressor
Drag & drop your files here, or click to browse
Lossless removes unused objects and recompresses streams. Other levels also recompress embedded images as JPEG.
- Three techniques are applied depending on the level: removing unused objects and metadata, re-compressing streams with object streams, and downsampling/re-encoding large images as JPEG.
- Text and vector graphics are never rasterized. PDFs that are mostly text or already optimized may shrink very little — the report shows the actual result.
How to use PDF Compressor
From upload to download in 3 steps.
- 1
Add your file
Choose or drag a PDF file into the upload area (up to 200 MB each).
- 2
Adjust the settings
Optionally change the compression level — the defaults work well for most files.
- 3
Compress and download
Click Compress, follow the progress, and download the result. Files are deleted from the server automatically afterwards.
Supported formats and settings
- Input formats
- Output formats
- Limits
- Up to 200 MB per file
- One file per job
- Files are deleted automatically after processing
- Compression Level
- Lossless (structure only), Recommended (images 150 DPI) and Strong (images 96 DPI)
- Convert Images to Grayscale
- On or off
Why use our PDF Compressor?
Genuine Processing
Real conversions by proven engines — never renamed copies or fake results.
Private by Design
Files are deleted automatically after processing and never used for training.
Free to Use
No account, no subscription and no watermarks on your files.
Frequently Asked Questions
Which file formats does PDF Compressor support?
PDF Compressor accepts PDF files. It produces PDF.
Is there a file size limit?
Each file can be up to 200 MB. Larger files take longer to upload and process.
What happens to my files?
Files are uploaded only when you start processing. They are stored under random names in a private temporary folder, processed, and deleted automatically shortly afterwards — the exact time is shown with your result — or immediately when you click “Delete files now”. Files are never shared or used for training.
How does PDF Compressor work, and what are its limitations?
Three techniques are applied depending on the level: removing unused objects and metadata, re-compressing streams with object streams, and downsampling/re-encoding large images as JPEG. Text and vector graphics are never rasterized. PDFs that are mostly text or already optimized may shrink very little — the report shows the actual result.
Is PDF Compressor free to use?
Yes. PDF Compressor is free, needs no account, and does not add watermarks to your files.
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