Shrink a PDF for easier sharing
A PDF that's too large to email, too slow to upload, or rejected by a form with a size limit is a common frustration — usually caused by high-resolution scans or photos bloating an otherwise simple document. This free compress PDF tool shrinks a PDF by re-rendering each page at a quality level you choose and rebuilding a smaller file from those pages, entirely in your browser.
Where a PDF's size actually comes from
Text is remarkably cheap to store — a page of dense text might take just a few kilobytes. Images are a different story: a single high-resolution photo or scanned page can weigh several megabytes on its own. In practice, a bloated PDF is almost always one with several large, high-resolution scans or photos in it, which is exactly the case this tool is built for.
An honest trade-off worth understanding
This tool compresses a PDF by re-rendering every page as an image at your chosen quality level and reassembling those images into a new, smaller PDF. That's a reliable way to shrink scanned documents and photo-heavy files, but it comes with a real trade-off: because every page becomes an image, any text on that page is no longer selectable, searchable or copyable in the compressed result. For a scanned contract or a folder of photographed receipts — where the pages were already just images — this costs you nothing. For a text-heavy report where you rely on searching or copying the text, this may not be the right trade-off, and keeping the original file (or using it as-is, since text-only PDFs are usually already small) is often the better choice.
Why this matters in practice
- Email attachment limits — many providers cap attachments around 20–25MB.
- Upload limits — job portals, application forms and CMSs often reject oversized files.
- Faster sharing — a smaller file uploads and downloads faster on a slow connection.
- Storage — smaller files add up when you're archiving many documents.
How to use it
Upload your PDF, choose a compression level, and download the smaller file. Compare the before-and-after size shown on screen to judge whether you've struck the right balance between file size and image quality for your needs.
Private compression, not just smaller files
Because the entire process — reading the PDF, re-encoding its images, rebuilding the file — happens locally in your browser, a document you're compressing never has to be uploaded to a stranger's server just to make it smaller. For anything even mildly sensitive, that is a meaningful advantage over a typical "upload and wait" compression website.
Frequently asked questions
How does compressing a PDF actually reduce its size?
Each page is re-rendered as an image at a quality level you choose and reassembled into a new PDF, which is a reliable way to shrink files that are large because of high-resolution scans or photos.
Will compressing make my PDF blurry, and can I still select text afterwards?
There is a genuine trade-off: stronger compression saves more space at the cost of some sharpness. Because pages become images, text in the compressed file is no longer selectable or searchable — this tool suits scanned documents and photo-heavy PDFs best.
Should I use this on a text-heavy document I need to keep searchable?
Probably not — since compression rasterizes every page, a text-heavy PDF will lose selectable text. For documents where searchable text matters most, this trade-off may not be worth the size savings.
Is my file uploaded to compress it?
No. Compression happens entirely in your browser, so the document never leaves your device.