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Compress PDF
Reduce the file size of a PDF right in your browser — free, fast, and 100% private. Your file is never uploaded.
Upload a PDF to compress
Shrink its file size — your PDF never leaves your device.
Shrink a heavy PDF so it slips under an email or upload limit. Image Machine compresses your PDF in the browser — no upload, no account — by re-encoding its pages at a quality you choose. It's ideal for scanned, image-heavy documents, and because everything runs locally your file never leaves your device.
How It Works
Choose a tool
Pick from 120+ tools to resize, convert, compress, or enhance your image.
Upload & edit
Drag and drop your image and adjust the settings. It stays on your device.
Download
Save your result instantly — no watermark, no sign-up required.
Why Image Machine?
Your files never leave your device
All processing runs locally in your browser. Your images are never uploaded to a server.
Completely free
Every tool is free, with no limits, no watermarks, and no hidden costs.
Lightning fast
No upload waiting — your images are processed instantly on your own device.
Professional quality
Pixel-perfect output with full control over format, size, and quality.
Frequently Asked Questions
How do I reduce the size of a PDF?
Load the PDF and pick a compression level; each page is re-rendered and re-encoded to cut the file size. Lower quality means a smaller file, so balance the setting against how sharp you need the pages.
Why is my scanned PDF so large?
Scanned PDFs store each page as a high-resolution image, which adds up fast. Compressing them re-encodes those images at a lower size — exactly where this tool delivers the biggest savings.
Will compressing keep my text selectable?
This compressor rasterizes pages to shrink image-heavy files, so selectable text and crisp vectors are flattened. It's best for scans and photo PDFs; keep the original if you need the live text layer.