PDF Tools

PDF Compressor

Reduce PDF file size for email attachments and faster web downloads.

Batch ready

The Apex Toolz promise

No Login

100% Free

No Upload

Local Files

Browser-Based

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4 min readLast reviewed 2026-07-06

What this tool does

PDF Compressor rewrites PDFs with optimized images and structure to shrink file size while keeping text readable for sharing and submission.

Compression executes client-side—ideal for confidential reports that cannot go to third-party SaaS compressors.

Why you might need it

Many email systems block attachments above 10–25 MB. Scanned color PDFs blow past that quickly.

Government and university portals publish hard megabyte caps; compression avoids last-minute export panic.

Common use cases

  • Email a signed contract scan under Outlook limits
  • Upload thesis chapters to a submission site with size caps
  • Shrink real estate disclosure packets for clients on mobile data
  • Compress exported slide decks before archiving in ticket systems
  • Reduce scanned receipt PDFs for expense tools

Step-by-step guide

  1. 1Upload the PDF or multiple PDFs needing size reduction.
  2. 2Choose compression strength if options are exposed—stronger means smaller but softer images.
  3. 3Process All and compare output size to the original in the results panel.
  4. 4Open the compressed PDF locally to confirm text and signatures remain acceptable.
  5. 5Download and attach the smaller file.

Tips & best practices

  • Scan at lower DPI at the source when possible—compression cannot recover sharpness from 600 DPI color scans.
  • Merge related PDFs first if you will compress once anyway—single pass saves time.
  • Keep an uncompressed archive for legal records; distribute compressed copies externally.
  • If only images are huge, exporting pages to JPG and rebuilding may help extreme cases.

Limitations

  • Heavy compression softens photos and scanned signatures—review before legal submission.
  • Encrypted or corrupted PDFs may fail to parse.
  • Very large files may require patience or splitting on older hardware.

Frequently asked questions