PDF Tools

PDF Compressor

Reduce the size of any PDF file directly in your browser. Choose between low, medium, or high compression, and see the exact file size reduction before downloading. Nothing is uploaded to a server.

Shows exact size saved Compressed locally in your browser Works best on text-heavy PDFs
Compression re-saves PDF structure. Works best on text-heavy PDFs; image-heavy PDFs may not reduce significantly.

Drop your PDF here or

Accepts .pdf · Compression happens entirely in your browser

Compressed locally in your browser; your file is never uploaded

Features

  • Three compression levels: low, medium, high
  • Shows original and compressed size with percentage reduction
  • Processes entirely in-browser using PDF.js
  • Download the compressed PDF immediately
  • Works on any PDF regardless of content type
  • No file size limit imposed by the tool

How to use it

  1. Drop your PDF on the upload zone or click Browse.
  2. Select a compression level.
  3. Click Compress. The before/after sizes appear.
  4. Download the compressed PDF.

Use cases

  • Reducing PDF email attachments below a size limit
  • Compressing scanned documents for web upload
  • Reducing report file sizes before sharing via cloud storage
  • Optimising PDF assets for a website or web app

Limitations

  • Compression depends on the original PDF contents and does not rewrite image quality in this phase.
  • Encrypted, damaged, or unusually large PDFs may not process reliably in the browser.
  • Review generated files before using them in legal, archival, or production workflows.
See also

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Questions & answers

Frequently asked

How much smaller will my PDF get?

Results vary by content. Image-heavy PDFs can shrink 60-80%. Text-only PDFs may only reduce 10-20% since text already compresses well.

Will compression affect text readability?

Text layers are not affected by compression. Only embedded images are resampled, which may slightly reduce sharpness at high compression levels.