Compress PDFs.
Smaller files. No upload.
Shrink large PDFs to email-friendly sizes — entirely in your browser. Choose a quality preset, and we'll do the rest. Your file never leaves your device.
How to compress a PDF
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Step 01
Add your PDF
Drag and drop a PDF file into the upload area, or tap to choose from your device.
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Step 02
Pick a compression level
Low keeps the file high-quality. High squeezes it down hardest. Medium is a good default — try it first.
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Step 03
Download instantly
Tap "Compress PDF." The smaller file is built locally and saved straight to your downloads.
Why this compressor?
Fast
Compression runs at native browser speed. No upload queues, no waiting on a server.
Private
Your PDF is read, re-encoded, and saved entirely on your device. Especially important for compressed PDFs — they're often the ones you want to email or text.
Free forever
No accounts, no daily limits, no watermarks on the result.
Reduce PDF size without uploading
PDFs are usually compressed for one of two reasons: emailing them (most providers cap attachments around 25 MB), or sharing them on chat apps. In both cases, the file is something you want to keep in your control — a contract, a CV, a scanned ID, a tax form.
Most "compress PDF" sites work by uploading your file, processing it on a server, and sending the smaller version back. That defeats the point of privacy. This tool does the same job locally: each page is re-rendered to a JPEG at a quality matched to the preset, then assembled into a fresh PDF using pdf-lib. Layout stays identical, file size drops dramatically, and your file never leaves your device.
After compressing, you might want to combine multiple files with our PDF merger or extract specific pages with the PDF splitter.
Questions, answered.
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Yes. Your PDF is processed entirely in your browser. It is never uploaded, and we have no way to see or store it.
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It depends on the source. PDFs with embedded images often shrink 50-80%. Text-only PDFs see smaller gains. Try Medium first, then bump to High if you need more reduction.
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Yes. Each page is re-rendered as an image at a quality appropriate to the preset, so layout and readability are preserved. Low keeps text crisp; High prioritizes file size.
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Because compression rasterizes pages, text becomes part of the image. The result is still printable and shareable but no longer text-selectable. If you need a searchable result, keep the original.
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No. There is no upload. The compressed PDF is built on your device using JavaScript and saved directly to your downloads folder.
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Yes. It works on phones and tablets. Large PDFs may take longer on phones since processing is limited by your device's CPU and memory.