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Tools / PDF compressor

PDF compressor

Scanned documents are large because every page is a photograph. This finds the JPEG images inside a PDF, re-encodes them at a quality and resolution you choose, and writes the file back out — typically the difference between a 20 MB scan and a 2 MB one. It runs entirely in your browser, so contracts and statements are not uploaded to a stranger’s server. Text-only PDFs are already compressed and will not shrink; the tool says so rather than pretending otherwise.

Runs entirely in your browser

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About this tool

Scanned PDFs are large because every page is essentially a photograph. This compressor finds the JPEG images inside a PDF, re-encodes them at a resolution and quality you choose, and writes the file back out — typically turning a 20 MB scan into something around 2 MB.

It runs entirely in your browser, which for contracts, statements and other documents is the whole point: the file is not uploaded to a stranger’s server. And it is honest about what it can do — a text-only PDF is already compressed and will not shrink meaningfully, so the tool tells you that rather than pretending to save space it cannot.

Use it when a PDF is too big to email or upload, especially scanned documents. You choose the balance between file size and image quality, so you can keep pages readable while getting under a limit.

Frequently asked questions

How does it make a PDF smaller?
It re-encodes the JPEG images inside the PDF at a lower resolution and quality that you choose, which is where the size of scanned documents comes from.
Why won’t my text PDF get smaller?
Text-based PDFs are already efficiently stored, so there is little to compress. The tool tells you this rather than appearing to shrink a file it cannot.
Is my PDF uploaded?
No. Compression happens in your browser, so contracts, statements and other documents are not sent to a server.
How much smaller will my scan get?
Scanned documents often drop dramatically — for example from around 20 MB to roughly 2 MB — depending on the quality and resolution you choose.
Can I control the quality?
Yes. You choose the resolution and quality, balancing a smaller file against keeping the pages readable.

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