Compress PDF for Email
Reduce the size of a PDF so it fits in an email attachment — processed entirely in your browser. Nothing is uploaded, so your documents never leave your device. Compression is best-effort and most effective on PDFs with embedded images.
Drop your file here
…or click to browse. Nothing leaves your device.
Private by design — no uploads, ever
Every tool on MergePDFs processes your file entirely in your browser.
No documents stored
Nothing is saved on any server or database — your files never leave your device.
No upload step
Merge PDF without uploading. It is instant and private because there is no upload at all.
Compress for email
Shrink a PDF for email attachments, entirely on your own machine.
Secure & free
No account, no watermarks, no queued jobs. Results download directly to you.
Frequently asked questions
Can I compress a PDF for email here?▾
Yes — this tool reduces the file size of a PDF so it fits neatly in an email attachment. Processing runs entirely in your browser, so nothing is uploaded.
How much can a PDF be compressed?▾
It depends on the file. Text-heavy PDFs often shrink a lot; image-heavy files compress less because your browser cannot fully re-encode embedded images. The result shows you the before and after size.
Is the compression done on my device?▾
Yes. Every byte is processed locally with JavaScript. Your compressed PDF is generated in your browser and downloaded straight to you.
Are my files uploaded to any server?▾
No. There is no upload step and no document is ever stored or copied on a server or database. Your file never leaves your device.
Is a smaller PDF lower quality?▾
The lower the quality setting, the smaller the file, but there can be a trade-off. Start with "Balanced" and only drop to "Low" if you need a much smaller attachment.