Reduce PDF file size for faster sharing and email attachments, then review quality before you download.
Read the guide Get help with this toolMost oversized PDFs are image-heavy: scanned pages, embedded photos, or slide exports saved at full resolution. Text and vector graphics barely contribute to file size, so a 30-page text contract might be 200KB while a 3-page phone scan of the same document can reach 20MB. Compression works by re-encoding those embedded images at a more efficient quality level and stripping data the viewer does not need.
This tool processes one PDF locally in your browser and measures the saved size after processing, so you see the real before/after numbers rather than a promise. The tradeoff is visual: heavier compression softens photographs and scan detail. Text-heavy PDFs compress least, because there is little image data to re-encode — if your file is already small, the result may be close to the original size.
Four compression presets let you choose the tradeoff: Maximum Quality (lightest compression, sharpest images), Balanced (good reduction with usually acceptable quality), Smaller File (stronger compression, review photos), and Email Friendly (aggressive compression for attachment limits, significant quality loss expected).
Choose your PDF (up to 25MB).
Select a compression preset: Maximum Quality, Balanced, Smaller File, or Email Friendly.
Compress locally — no upload.
Review original vs. compressed size and download.
Preparing a document for an email attachment
Keeping a smaller copy for sharing
Measured results: the tool reports the actual size change after processing, not an estimate.
Runs locally in the browser, so the document never leaves your device.
The original file is untouched; you download a separate smaller copy to review first.
Four presets cover different needs: from preserving image quality to maximizing email attachment compatibility.
No. The result depends on page count, images, fonts, and the original structure. This tool re-encodes embedded images; text-heavy PDFs compress least.
No. Text and vector content are preserved. Page count and page dimensions stay the same.
The tool measures and reports the real before/after sizes. If compression doesn't help, it tells you honestly — the output may even be slightly larger for already-optimized PDFs.
Start with 'Email Friendly' for maximum reduction, or 'Balanced' for a good compromise. Always review the result before sending.
Yes, the browser tool is free within its 25MB file limit. No upload, no account.
A ZIP archive and PDF compression are different. This tool reduces the size of one PDF; it does not create a ZIP archive. If you have multiple files, a ZIP may be appropriate when the recipient accepts it.
If one compression pass doesn't reach your target size, you can re-compress the output or use Split PDF to break the document into smaller parts. This tool does not guarantee a specific output size.