Reduce PDF file size right in your browser — pick a compression level, drop in one or more PDFs, and download smaller files. Free, no signup, your documents stay on your device.
Drop PDF files here
or click to browse from your device
Files Selected
Compression Level
Compressing your files…
Larger PDFs take a moment.
Done — files ready to download
The Compress PDF tool reduces the file size of a PDF by re-rendering each page as a JPEG image at a chosen quality, then assembling those images back into a new PDF at the original page dimensions. Pick a compression level, drop in one or more PDFs, and download the smaller versions.
Everything runs in your browser using pdf.js and jsPDF. Your document never leaves your device — the libraries are downloaded from a CDN, but your file isn't uploaded anywhere. That matters when the PDF is a contract, invoice, medical record, or anything else sensitive.
One trade-off worth knowing: because pages are rebuilt as images, selectable text becomes part of the page image. Text stays sharp and the PDF still prints and reads normally, but you can't copy text or search inside the compressed file. If preserving selectable text is critical, use the Light level (which preserves the most visual detail) or skip compression for that document.
Aggressive — smallest file size. Pages render at 1.2× and JPEG quality is 55%. Best for email attachments, web uploads, and digital sharing where size is the priority and a small drop in image sharpness is acceptable.
Balanced (recommended) — pages render at 1.5× and JPEG quality is 78%. Significant size reduction with text and most images still looking sharp. The right default for business documents, reports, and presentations.
Light — minimal compression. Pages render at 2.0× and JPEG quality is 90%. Smaller file than the original, but visual fidelity stays close to pristine. Best for portfolios, design files, and photography PDFs.
Email services cap attachment sizes around 10–25MB (Gmail, Outlook, Yahoo), and a single scanned document or image-heavy report easily blows past that. Cloud storage tiers (Drive, Dropbox, OneDrive) fill faster with bloated PDFs. Government submission portals and CMS uploaders both enforce strict file-size limits. And on mobile, large PDFs are slow to open, scroll painfully, and chew through memory. Compressing before sharing fixes all of that.
Drop in your PDF
Drag in one or more files, or click Select PDFs to browse.
Pick a compression level
Aggressive, Balanced, or Light — Balanced is the safe default.
Click Compress PDF
Each file is processed in turn — large or image-heavy PDFs take longer.
Download each result
You'll see the original and compressed sizes side-by-side with the percentage saved.
Image-heavy PDFs — scans, photo-rich reports, brochures — compress the most, often 50–80%. Text-only PDFs already use efficient encoding, so the savings are typically smaller — maybe 10–30%, and in some cases the compressed file can be very close to the original or even slightly larger. PDFs that already went through a compressor have less left to give. If you see "Already optimal" on a result, it means the rebuilt file wasn't smaller than what you started with.
3 Compression Levels
Aggressive, Balanced, or Light — your choice.
Batch Multiple PDFs
Drop several files; each compresses individually.
Original Page Size
Pages keep their exact dimensions — no cropping.
Your File Stays Local
The PDF is processed in your browser, not on a server.
Size Reduction Stats
See original vs. compressed and percent saved.
Free Forever
No signup, no watermark, no per-file fees.