Compress PDF
PopularAnalyze size and optimize losslessly.
Browser-firstIn: PDFOut: PDF
Analyzed privately in your browser. Any secure-worker step is optional and clearly labeled before a file is uploaded.
About this tool
See exactly what's inflating your PDF and losslessly repack it in your browser. Deep image downsampling runs on a secure, auto-deleting worker.
Runs in your browser when possible, with an encrypted server fallback for large or complex files.
How it works
- 1Add your PDF — it's analyzed privately, right in your browser.
- 2Review the size breakdown and download a lossless-optimized copy.
- 3For image-heavy files, deep image compression runs on a secure, auto-deleting worker — the page checks one is available before anything leaves your device.
What this tool can do
- Two paths
- Lossless structural repack always runs in your browser; deep image compression is an optional, clearly-labeled secure-worker step that needs a native engine.
Common questions
What happens to my file after Compress PDF runs?
The file is processed on an encrypted, isolated worker. Inputs are wiped when the job finishes, the download link stops working after 60 minutes, and stored copies are erased by a daily storage rule.
How large can my file be?
Up to 100 MB per file.
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All toolsNo sign-up required. Your files stay on your device until you run a tool.