Upload a PDF, pick a compression level, and download a smaller file ready to email or upload. Everything happens inside your browser your file is never uploaded to a server. 100% free, no watermark.
Shrink large PDFs without installing software or creating an account. Everything runs locally in your browser using JavaScript, so your file stays private.
Your PDF is processed entirely on your device. Nothing is uploaded to any server.
Most documents compress in a few seconds, right in your browser tab.
No subscription, no watermark, no page limits, and no signup required.
Use it on desktop, tablet, or mobile in any modern browser.
PDF compression is the process of reducing a document's file size while keeping it usable. NexaTools does this by rendering each page of your PDF onto a canvas in your browser, converting it into a compressed JPEG image at the quality level you choose, and rebuilding a new, smaller PDF from those images. The result is a file that opens the same way in any PDF viewer, just at a fraction of the original size.
Because the entire process happens with JavaScript running locally, no part of your document is sent anywhere while it's being compressed. This is different from many online compressors that upload your file to a remote server, process it there, and send it back you avoid that step entirely here.
Reducing a PDF's file size takes less than a minute. Follow these steps:
Drag and drop your PDF file into the upload area, or click to browse your device.
Choose Low, Medium, or High compression depending on how much size you need to save.
Press "Compress PDF" the tool rebuilds a smaller PDF locally in your browser.
Click "Download Compressed PDF" to save your smaller document instantly.
100% Private. Your PDF never leaves your device. There is no server upload involved.
Completely Free. No credit card, no hidden fees, no premium tier. Unlimited compressions.
Instant Results. No waiting in a queue and no email verification needed to download.
3 Compression Levels. Choose exactly the balance of size and quality you need.
No Watermark. Your compressed document is clean, with no branding added to the file.
Works on Mobile. Fully responsive on desktop, tablet, and mobile browsers.
NexaTools Compress PDF is built for anyone who needs a smaller file quickly, without installing software or uploading documents to a third-party server.
Email senders shrinking attachments to fit under provider size limits before sending.
Students and researchers compressing scanned assignments, theses, or reports for easier uploading to portals.
Office professionals reducing the size of reports, scanned contracts, and presentations for faster sharing.
Anyone scanning documents who needs to shrink large scanned PDFs from a scanner or phone app.
Website owners compressing PDFs before publishing them online to keep page load times fast.
Privacy-conscious users who prefer compressing files locally instead of uploading them to a remote server.
People compress PDFs for many different reasons. Some of the most common include:
Shrink a PDF so it fits within your email provider's attachment size limit.
Reduce file size before uploading to portals, forms, or cloud storage with size restrictions.
Shrink large scanned documents to save space on your device or shared drive.
Compress PDFs hosted on a website so they load faster for visitors.
Use Low if the PDF will be printed or needs the sharpest possible detail. Medium works for most everyday sharing. High is best when you just need the smallest possible file, such as for email attachments.
Compression here gives the biggest savings on scanned pages, photo-heavy reports, and design files with large images.
Since each page becomes an image, text in the compressed file is no longer selectable or searchable. If you need to keep editable text, compress a copy instead of your original.
If a PDF is encrypted or password protected, remove the password first using a PDF editor, then compress it here.
This button only activates once a valid PDF has finished loading into the tool. If it stays greyed out, check that your file appears in the upload area above and that the compression level selector has appeared.
This means the compression libraries couldn't load in your browser. Check your internet connection and refresh the page, then try again.
This usually happens when the PDF is corrupted or password-protected. Remove the password using a PDF editor first, then try compressing again.
Files larger than 25 MB or files that aren't valid PDFs are rejected automatically, and a warning message will explain why.
Try a higher compression level (Medium or High) for smaller output, or note that already-optimized text-based PDFs may not shrink as dramatically as scanned image-heavy files.
This is expected each page is rasterized into an image during compression. If you need to keep selectable text, compress a copy and keep your original PDF for editing.
Everything you need to know about the NexaTools free Compress PDF tool.
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Rashid Amin is the founder of NexaTools and builds browser-based productivity tools focused on privacy, speed, and usability. NexaTools helps users convert images, edit PDFs, use developer utilities, and access AI-powered tools directly in the browser without unnecessary uploads or signups.
Last Updated: July 2026
Shrink your file size in seconds free, private, and no signup required.