PDF Compressor
Try reducing PDF size by clearing document fields and rewriting structure.
Drop a file, get the result. Nothing is uploaded. Accepted formats: PDF. Maximum file size: 100 MB. Files stay in your browser — nothing is uploaded.
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Drop a file, get the result. Nothing is uploaded.
Files stay in your browser — nothing is uploaded
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- Runs in your browser: nothing is uploaded
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When to use this
Try this when a PDF is over an attachment or upload limit and you want to see whether a structural rewrite makes it smaller. The tool clears standard title, author, subject, keywords, producer, and creator fields, then saves the PDF with object streams. It works in your browser without uploading the file.
It does not downsample photos or scanned pages. Some PDFs shrink, while already optimized files may barely change or even get larger. Compare the reported before-and-after sizes rather than assuming a reduction.
Good to know
Check the result. Open the downloaded PDF and inspect pages, links, forms, and annotations you rely on. Keep the source until you have verified the output.
Do not rewrite a signed PDF. Re-saving a PDF can invalidate digital signatures. Use the original if its signature must remain valid.
This is not a privacy scrubber. Clearing standard document fields does not guarantee removal of every embedded identifier, attachment, comment, or XMP metadata item. Do not rely on this tool to sanitize sensitive documents.
Image-heavy PDFs need a different approach. This tool does not recompress embedded images. If scans dominate the file size, a smaller result may require image resampling, which can reduce readability.
Quick Reference
| PDF type | Likely outcome | What to do |
|---|---|---|
| Unoptimized structure | May get smaller | Compare the output size |
| Scanned or photo-heavy | Often little reduction | Consider image resampling elsewhere |
| Already optimized | May stay similar or grow | Keep the smaller original |
| Digitally signed | Signature may be invalidated | Do not process the signed copy |