Reduce the size of your PDF by choosing the compression level that suits your needs.
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Compression level
Your file is sent to our server for compression, then immediately deleted. No files are stored.
PDF compressed successfully!
This file is already well optimized, compression could not reduce its size further.
Original size
Compressed size
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Compress PDF Online: Free, Fast and Effective
PDF files can quickly become large, especially when they contain high-resolution images, scans or graphics. An oversized PDF is difficult to send by email, slow to load and wastes storage space. Our PDF compression tool allows you to significantly reduce the size of your documents in seconds.
Unlike tools that only strip metadata, our compressor performs real image recompression: resampling, format conversion and optimization of the document's internal structure.
Three compression levels are available to suit every use case. Maximum compression (72 dpi) is ideal for documents intended for web viewing or email: images are significantly reduced but remain readable on screen. Recommended compression (150 dpi) offers the best trade-off between visual quality and file size. Light compression (300 dpi) preserves print quality while optimizing the file structure.
Your file is sent to our server only for the duration of the compression, then immediately deleted. No documents are stored or shared. The tool works with all modern browsers on desktop, tablet and mobile.
Frequently Asked Questions
Our tool analyzes your document, resamples embedded images to the target resolution (72, 150 or 300 dpi depending on the level chosen), recompresses data and optimizes the internal file structure. The result is a lighter PDF while preserving the original text and layout.
Compression mainly affects images embedded in the document. Text, fonts and layout remain unchanged. With the "Recommended" level (150 dpi), visual quality is very close to the original for on-screen viewing. The "Light" level (300 dpi) preserves print-ready quality. Only the "Maximum" level (72 dpi) noticeably reduces image resolution.
The tool accepts PDF files up to 50 MB. This limit covers the vast majority of common documents (reports, presentations, scans) while ensuring reasonable processing times.
Your file is sent to our server only for the duration of the compression. It is processed via a temporary file, then immediately deleted once the result is returned. No files are stored, shared or used for any other purpose. Our server is hosted in Europe (Hetzner, Germany).
For email or online sharing, choose "Maximum" (72 dpi) for the greatest size reduction. For general use (archiving, on-screen reading), "Recommended" (150 dpi) offers the best trade-off. If you need to print the document, choose "Light" (300 dpi) to preserve image quality.
Some PDFs are already optimized, especially those generated by professional software (Adobe Acrobat, Office). If your document contains few images or already compressed images, the reduction will be minimal. PDFs containing mainly vector text are also difficult to compress further.
Yes. The tool is fully responsive and works on smartphones and tablets. You can select a file from your file manager and compress it directly in your mobile browser.