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Compression happens on your device. Your PDF is not sent to a processing server.
Best for email attachments, upload limits, school portals, job applications, and messaging apps.
Yes. Compress PDF is completely free — no signup, no watermarks, and no file limits. It runs locally in your browser, so there is no server cost to pass on.
No. Compression happens on your device. Your PDF is not sent to a processing server. Processing happens with JavaScript in your browser, so your document never leaves your device.
Yes. Once the page has loaded, processing runs entirely on your device, so it keeps working without an internet connection.
Compress PDF accepts PDF files and produces a Compressed PDF. Best for email attachments, upload limits, school portals, job applications, and messaging apps.
No. Compress PDF works in any modern browser — Chrome, Firefox, Safari, or Edge — on Windows, macOS, Linux, iOS, and Android. There is nothing to download or install.