Compress PDF files online with scan-first quality presets. Reduce scanned PDF size privately in your browser with clear before-and-after reporting.
Processing stays in your browser.
Choose a quality preset, review a page, then rasterize and rebuild the document locally in your browser.
Every page becomes a JPEG scan. Selectable text, forms, links, layers, metadata, and cryptographic signatures are removed or invalidated.
Preview is selected-page only. Compression processes every page at the chosen preset.
Pages run sequentially and yield between pages. Cancellation can stop PDF rendering, but JPEG encoding and final rebuild may finish their current browser call first.
Practical guide
This browser-based PDF compressor is designed for image-heavy scans that are too large to email, store, or upload. It renders each page at the selected resolution and rebuilds a smaller scan-first PDF with the same physical page dimensions.
Balanced is the default for everyday scanned documents. Clear uses a higher resolution for small print and detailed forms, while Smaller applies stronger image compression when reducing PDF file size matters more than fine detail.
Pages are processed sequentially to keep browser memory more predictable, with live progress and cancellation between stages. Mixed portrait, landscape, rotated, and differently sized pages keep their original physical layout in the output.
Raster compression flattens selectable text, forms, links, layers, metadata, and cryptographic signatures into page images. The result screen reports the actual output size and says “No size reduction” when an already efficient PDF does not become smaller.
Practical answers about privacy, formats, and output quality.
Every page is rendered as a JPEG image and rebuilt into a new PDF. Selectable text, forms, links, layers, source metadata, and cryptographic signatures are removed or invalidated.
Balanced is the default at 150 DPI and JPEG quality 0.78. Clear keeps more detail at 180 DPI. Smaller uses 120 DPI and stronger JPEG compression.
No. Validation, page rendering, rebuilding, previewing, and download preparation all run inside your browser.
No. Very small or already efficient PDFs can grow after rasterization. The tool reports No size reduction honestly and still lets you download the valid output.
PDFs over 50 MB or 100 pages show a workload warning because browser rasterization can use substantial memory and CPU. You can continue after acknowledging the risk.
Yes. Rendering stops when the browser library allows it, and processing also checks cancellation between pages. A JPEG encoding or final rebuild call may finish before cancellation takes effect.
No. Password-protected and encrypted PDFs are rejected before processing. Remove protection with an authorized PDF application, then try the unlocked copy.