Reduce file size instantly — quality, layout and text preserved perfectly.
Convixy PDF Compressor reduces the file size of your PDF documents instantly — right from your browser. No software to install, no account to create, and no technical knowledge required. It works by optimising the internal structure of your PDF: resampling embedded images to a screen-friendly resolution, removing redundant data streams, stripping unused font subsets, and eliminating unnecessary internal objects. The result is a significantly smaller file that retains the same readable layout, crisp text, and complete page structure as the original. Whether you are on a laptop, tablet, or mobile phone, the tool works seamlessly across all devices and operating systems including Windows, macOS, Android, and iOS.
PDF files accumulate size quickly — especially those exported from design software, generated from scanned pages, or produced from presentations with high-resolution images. A large PDF creates real, practical problems: email services like Gmail and Outlook enforce attachment size limits, many online portals and government forms cap uploads at 5MB or 10MB, and large files take longer to load and send over mobile connections or slow broadband. Compressing your PDF solves all of these problems at once. You get a smaller, faster, more shareable file without having to redo any of the original work. If you need to create PDFs from scratch first, our Word to PDF, Excel to PDF, and PowerPoint to PDF converters are a good starting point before compressing.
There are several everyday situations where compression makes an immediate and meaningful difference:
The amount of compression depends entirely on what is inside the PDF. Files with many high-resolution photographs or large scanned images typically see the most dramatic reductions — often 60% to 85% smaller. PDFs that are already well-optimised, or that consist mostly of text and simple vector graphics, will see smaller but still meaningful reductions of 10% to 30%. After every compression, Convixy shows you the exact original file size, the new compressed file size, and the percentage reduction achieved — so you always know precisely what was saved. If you need to combine multiple compressed PDFs into one, use our Merge PDF tool afterwards.
Convixy uses the /screen optimisation profile from Ghostscript, which targets a practical balance between file size and readability for digital use. Images are resampled to 72 DPI — the standard resolution for on-screen display — which is more than sufficient for documents you intend to read, share digitally, email, or display on a screen. Text, vector graphics, fonts, and document structure are completely unaffected by compression and remain perfectly sharp at any zoom level. The main trade-off to be aware of is that if your PDF contains high-resolution photographs specifically intended for professional print output at large sizes, the compressed version may show a slight reduction in print crispness at very high magnification. For all other everyday uses — contracts, reports, invoices, presentations, correspondence — the visual quality of the compressed PDF is indistinguishable from the original.
Ghostscript is an open-source PostScript and PDF interpreter that has been actively maintained since 1988 and is widely regarded as the most reliable server-side PDF processing engine available. When you upload a PDF, our server passes it through Ghostscript with the -dPDFSETTINGS=/screen flag and -dCompatibilityLevel=1.4. Ghostscript re-renders the PDF internally, resampling all raster images to 72 DPI, applying JPEG and JBIG2 compression to image streams, removing embedded data that is no longer referenced, subsetting fonts to include only the characters used in the document, and writing a clean, optimised PDF 1.4-compatible output file. The process is fully lossless for text and vector content, and lossy only for raster image resolution — which is the primary source of large PDF file sizes in most documents.
The most dramatic results come from PDFs that contain large embedded raster images. Specifically:
Text-only PDFs — such as a plain word-processed document, a legal contract, or a technical specification — compress less dramatically since they contain little or no raster image data. However, the process still removes internal structural overhead and is always worthwhile.
No. Password-protected PDFs that require a password to open cannot be processed by this tool, because the compression engine needs full access to the document’s content to re-render it. If you need to compress a password-protected PDF, you will first need to remove the password protection using your original PDF software and then upload the unlocked file. PDFs with owner-level passwords (which restrict printing and editing but not opening) can usually be processed without any issue.
Yes. Convixy supports uploading and compressing multiple PDF files in a single session. Each file is processed individually and made available for download as a separate compressed PDF. This is especially convenient when you have a batch of reports, invoices, or scanned contracts that all need to be reduced before uploading to a document portal or archiving in a folder. Need to combine all the compressed files into one document? Use our Merge PDF tool, or trim out unwanted pages first with Split PDF.
The current file size limit is 10MB per file. The vast majority of everyday PDF documents fall well within this limit. If your original file exceeds 10MB, the most effective approach is to return to the source document and reduce image resolution before re-exporting. In Microsoft Word, go to File → Compress Pictures and select a lower resolution. Re-export as PDF using our Word to PDF or Excel to PDF tools, then compress the result here.
Privacy is taken seriously at every step. Your file is transferred to our servers over an encrypted TLS connection — the same standard used by banks and secure websites. Once your compressed PDF is generated and downloaded, both the uploaded original and the compressed version are automatically and permanently deleted from our servers. We do not read, index, store, or share your document content in any way. Since no account or login is required, there is no user profile or upload history associated with your files. Your documents remain entirely your own throughout the entire process.
Nothing to install, nothing to update, and nothing to configure. Convixy runs entirely in your browser. This means it works on Windows, macOS, Linux, Android, and iOS without any setup whatsoever. There is no desktop application to download, no browser extension required, and no dependency on having Adobe Acrobat, Ghostscript, or any other software installed on your device. Simply open the page, upload your PDF, and download the compressed result — the entire process takes seconds.
Once you have your compressed PDF, Convixy has everything you need to manage it further:
Word to PDF
Excel to PDF
PowerPoint to PDF
CSV to PDF
TXT to PDF
Image to PDF
Merge PDF
Split PDF