Use this online PDF compressor to reduce the file size of your PDF documents. Make PDFs smaller to send them by email or upload them online.
or drop, paste, or choose from cloud
How can I reduce PDF file size online? Simply upload your PDF and choose a preset to get the result you want. You can upload files from your computer or phone, from a URL, or from cloud storage services such as Google Drive or Dropbox.
Nothing is installed and no account is needed to start. The compression runs on the server, so an old laptop does the same work as a new one.
The result is a PDF again. Pages, text, and layout stay where they were, so the smaller file opens in the same reader as the original.
What does PDF compression do? It mainly affects the images inside your PDF. The compression reduces their quality, usually by lowering their DPI value.
Basic compression is the default. It aims at a medium file size and high quality, which fits most documents. Strong compression aims at a small file size and medium quality.
The quality presets each name the image resolution they target, so the tradeoff is stated rather than guessed. Insane uses 20 dpi and Minimum uses 40 dpi. Normal uses 72 dpi, Ebook 150 dpi, and Printer and Prepress both use 300 dpi.
Prepress keeps the color information as well, which matters when the file goes to a print shop.
Pick the target file size mode and type a number of megabytes. The compressor then aims at that size instead of at a fixed quality level.
The field takes 1 to 1024 MB, so 1 MB is the smallest target you can ask for. Whole numbers only, and a value outside the range is corrected for you.
There is a separate preset for email. It aims at 10 MB, which is the attachment ceiling most mail providers enforce.
The compressor runs in a browser, so the operating system does not matter. Windows, macOS, Linux, Android, and iOS all work the same way.
On a phone you can pick a PDF from the device, paste a link, or take one from cloud storage. The smaller file downloads like any other file.
There is nothing to download and nothing to install, which also means a shared or locked-down computer can still do the job.
The uploader takes more than one PDF. Every file in the batch gets the same setting, and each one comes back as its own smaller document.
Without an account you can add 5 files per job, and 10 once you register, which is free. Each file can be up to 50 MB, and the paid plans raise both limits.
Every compression mode is open to everyone, including the target file size and the email preset. No mode is held back for signed-in visitors.
All uploads use encrypted connections. The processing is fully automated with no human access to your files.
The documents you upload are not used to train AI models, and their contents are not monitored. Nobody reads them and no copies are made.
You keep the copyright and the ownership of the original and of the compressed PDF. Each download address is unique and cannot be guessed.
Most mail providers cap an attachment at about 10 MB and bounce the message above it. The email preset aims at that size, so the mail goes out on the first try.
Job portals, visa forms, and university applications usually set a hard size limit on each upload. A target of 1 MB or 2 MB clears most of them.
A scan is a photo of a page, so ten scanned pages can weigh more than a hundred pages of text. Compression brings a folder of scans down to a size worth keeping.
Upload your PDF file.
Choose a compression method (basic, strong, preset).
Convert images in the PDF to grayscale to compress the file even more. (optional)
Click "Start" when you are ready.
Yes. Upload a PDF, pick a compression mode, and download the smaller file. No account is needed and nothing is installed.
Pick a quality preset that keeps the resolution you need. Printer and Prepress both target 300 dpi, and Ebook targets 150 dpi. Compression mostly affects the images, so a document that is mostly text changes very little.
Choose the target file size mode and type the number of megabytes you want. The field takes 1 to 1024 MB, so 1 MB is the smallest target, and the compressor aims at the number you enter.
Usually yes, because the images inside the PDF are shrunk by lowering their dpi. Use Basic compression or one of the higher presets to keep more image detail.
All uploads use encrypted connections and the processing is fully automated, with no human access to your files. Your documents are not used to train AI models, and you keep the copyright and the ownership of every file.
The same way as on Windows. The compressor runs in the browser, so macOS, iOS, Android, and Linux all work without an extra app. Open the page, add the PDF, and press Start.
Up to 5 files per job without an account, and 10 once you register, which is free. Each file can be up to 50 MB. Larger batches and bigger files are part of the paid plans.
Scanned pages and photos are the usual reason. A scan stores a whole page as an image, so a few scanned pages can outweigh a long text document. Compressing those images is what makes the file smaller.
Every app here runs in the browser, with nothing to install.
