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Compress PDF
Shrink large PDFs so they’re easy to email, upload, and share. Choose a compression level and reduce file size in seconds — all processed in your browser, with nothing uploaded.
✓ Free✓ No signup✓ Privacy first✓ Runs in your browser
Compress PDF – ToolPremier

Drop PDF files here

or click to browse — up to 15 files at once

Choose files
Files never leave your device. Compression happens locally.

Batch up to 15 PDFs · 50 MB each · compressed locally · no signup, no server, no tracking.

How it works
Convert in three steps

Add your PDFs

Drag in files or browse. Scanned and image-heavy PDFs compress the most.

Pick a level

Light keeps the most detail; Strong makes the smallest files. Balanced is a great default.

Download

See how much each file shrank, then download individually or all at once.

FAQ
Common questions
No. Compression runs entirely in your browser. Your files never leave your device — there’s nothing to upload, store, or delete.

Each page is rebuilt as an optimized image at a resolution and quality matched to your chosen level. This dramatically reduces size for scans and image-rich documents, while keeping pages looking the same.

Because pages are rebuilt as images, text is no longer selectable or searchable in the compressed file. If you need selectable text, keep the original — this tool is designed for the smallest possible visual file.
PDFs that are mostly plain text are already very efficient, so image-based compression can occasionally produce a similar or slightly larger file. The tool flags this so you can simply keep your original.
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About the PDF Compressor

Large PDFs are a common headache — too big to email, slow to upload, and awkward to store. Compressing a PDF reduces its file size so it’s easy to share while keeping every page readable. This tool is especially effective on scanned documents and image-heavy files, where it can cut size dramatically. Everything is processed in your browser, so even big files compress quickly and stay completely private.

Benefits
  • Three clear compression levels to balance size against clarity
  • Big savings on scanned and image-heavy PDFs
  • Batch up to 15 files at once with one-click download all
  • See exactly how much each file shrank before downloading
  • Processed locally — private by design, nothing ever leaves your device
Privacy

All compression happens client-side in your browser. No files are uploaded, logged, or stored on any server. The only external requests are one-time loads of the open-source PDF engines, after which everything runs on your device.