How to Compress a PDF for Gmail
Gmail blocks attachments larger than 25 MB and quietly switches big files to a Drive link.
Open the Compress PDF toolIf you want the PDF to land as a real attachment instead of a Google Drive link, it needs to be under Gmail's 25 MB ceiling. Compressing first keeps the document inline so recipients can open it without a second click or a permissions prompt.
Drop your file in below, compress, and attach the smaller version straight to your Gmail message.
Steps to Compress a PDF for Gmail
Upload your PDF
Drag the file into the tool or click to browse. It loads instantly in your browser.
Pick a compression level
Choose light, balanced, or strong compression depending on how small you need the file.
Download the smaller PDF
Save the compressed file in one click — ready to attach, upload, or submit.
Keeps text sharp
Smart compression strips redundant data and recompresses images without making text fuzzy.
100% private
Everything happens in your browser. Your files are never uploaded to a server, so nothing is stored, shared, or seen by anyone but you.
Free, no sign-up
No account, no watermark, and no install. Use it as many times as you need, completely free.
Ready to start?
Compress PDF runs free in your browser — your files never leave your device.
Open Compress PDFFrequently asked questions
Why does Gmail turn my PDF into a Drive link?+
Gmail does that automatically when an attachment is over 25 MB. Compress the PDF below that threshold and it will attach normally.
Will compressing reduce the quality of my PDF?+
Text stays crisp because it is vector-based. Image-heavy pages are recompressed, and you control how aggressive that is with the compression level.
Is there a file size limit?+
The tool runs in your browser, so it comfortably handles typical documents. Very large scans may take a few extra seconds to process.