How to compress a PDF on your phone
Your phone is where the PDF problem usually arrives: a portal, an email or a message says the file is too big, and the file is sitting in your phone's downloads or photos. You do not need a special app. Because every tool on this site runs in the browser itself, your phone can do the whole job - and your document is never uploaded anywhere.
Two phone tips before you start. First, work on Wi-Fi if the file is huge, because the download at the end is the new file coming back to you. Second, for very large scans a computer is faster and gentler on memory; phones handle everyday documents - forms, certificates, a few scanned pages - without any trouble.
How to do it
- Open this site in your phone browser and tap Compress PDF (this page's guide links straight to the tool below).
- Add the PDF from your files, downloads or document app.
- Type the exact target your portal or email asks for, in KB or MB.
- Tap Compress PDF and download the smaller file.
- Share or upload the new file from your downloads.
Common questions
Does this work on iPhone and Android?
Yes. Any modern phone browser works - Safari, Chrome or Samsung Internet - because the tool is a web page, not an app.
Where does the compressed file go?
To your downloads, like any file your browser saves. From there you can attach it to email or upload it to the portal.
Is it safe to compress private documents on a website?
On this site, yes - the file is processed on your phone and never sent to a server. That is the design, not a promise buried in small print.
Related tools
Every tool on PDFExactSize
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