Compress PDF Without Losing Quality
Reduce PDF file size online free with our multi-stage compression pipeline. Strip metadata, re-compress images, and optimize streams — all while keeping your text selectable and your fonts intact.
PDF Compressor
Multi-Stage Compression · Text & Fonts Stay Intact
Our PDF compressor uses a 4-stage pipeline — metadata stripping, image re-compression, stream optimization, and output verification — to shrink your files while keeping them readable. Because the pipeline targets embedded images and internal object streams rather than the text layer, your document stays fully selectable and searchable, and embedded fonts render exactly as before. Scanned or image-heavy PDFs — contracts, reports, ID scans, photo-based pages — typically see the biggest size reduction, since most of their weight comes from the page images rather than the text itself.
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How PDF Compression Works
PDFs are usually large because of embedded page images, duplicated fonts, and leftover editing metadata — not because of the text itself. Here's what our pipeline actually does with each of those.
Upload Your PDF
Drag & drop a text-based, scanned, or mixed PDF. Files up to 50MB are supported.
Choose Compression Level
Low keeps images near-original for archival copies; Extreme resamples images most aggressively for the smallest file.
Multi-Stage Processing
XMP metadata and unused objects are stripped first, embedded JPEG/PNG images are resampled, then remaining object streams get zlib max-level recompression.
Review & Download
See exact before/after sizes and the percentage saved, then open the PDF to confirm text and images still look right before you share it.
Text Stays Searchable
Compression targets images and streams, not the text layer, so words remain selectable and copy-pasteable
Four Compression Levels
Low, Medium, High, and Extreme presets let you trade image sharpness for file size on your terms
Best For Scanned PDFs
Image-heavy and scanned documents shrink the most, since page images — not text — usually make up most of the file size
Automatic Fallback
The verification stage compares sizes and keeps the original if compression wouldn't actually make it smaller
Pro Tips for Compressing PDFs
Scanned PDFs Compress the Most
If your PDF is a scan or photo-based document, expect a much bigger reduction than a text-only report — most of the size is in the page images.
Text-Only PDFs Won't Shrink as Much
A text-only PDF (like a Word export with no images) is already small and compact, so don't expect the same dramatic size drop.
Use Low for Signed or Legal Documents
Choose Low if your PDF contains signatures, seals, or fine print — it keeps images closest to original quality.
Always Zoom In Before Sharing
After compressing, zoom into stamps, QR codes, and small print to confirm they're still legible at your chosen level.
Security & Privacy
Your documents are safe with us - learn about our commitment to privacy and security
Automatic File Cleanup
Every PDF you upload — including any it contains scanned pages, forms, or signatures — is processed on our servers and permanently deleted after 1 hour. No document is stored longer than necessary.
Encrypted Transfer
Files are uploaded over a secure HTTPS connection at every step.
No Registration Required
Use our tool without creating an account or providing any personal information.
No Document History
We don't store any information about your compressed files or usage history.
1-Hour Auto Delete
Uploaded and compressed files are automatically removed from our servers after 60 minutes.
Frequently Asked Questions
Find answers to common questions about our PDF compression tool
Upload your PDF using our PDF compressor, pick a compression level, and the tool will reduce your file size automatically without leaving your browser.
Medium works well for most PDFs. Use Low if quality matters most — signatures, legal documents, fine print — or Extreme when you need the smallest possible file, such as fitting an email attachment limit.
No. The pipeline only touches embedded images, metadata, and internal streams — your text stays fully selectable, searchable, and copy-pasteable at every compression level.
Embedded fonts are preserved so text keeps its original look. Only unused font data and metadata like XMP tags and editing comments are removed.
Yes — scanned and image-heavy PDFs usually see the biggest size reduction, since most of their weight comes from the embedded page images rather than the text.
Our online PDF compressor supports files up to 50MB per upload.
Yes, this PDF size reducer is 100% free with unlimited usage and no watermark.
Yes. Files are transferred over HTTPS and automatically deleted from our servers after 1 hour.