Compress a PDF to fit your email's size limit
Shrink a PDF so it slips under the 25 MB email cap — without uploading it. Compression runs in your browser, so the file never leaves your device.
Drag & drop your file here
or click to choose — your file is processed locally and never uploaded
Uploads of your file
0
Bytes of your file sent
0 B
Verified — your file never left this device.
Process a file and watch these stay at zero.
Smaller file, same privacy
Beat the size cap
Reduce a heavy PDF so it fits common 25 MB attachment limits.
Nothing uploaded
The document is compressed on your device — no server ever holds a copy.
Free and clean
No watermark, no account, no daily limit on the output.
Why not to upload a file just to email it
It's ironic: to send a document privately by email, people often upload it to a compression website first — handing a copy to a third party on the way. If the PDF is an invoice, a scan or a signed form, that defeats the point. Compressing it in your browser keeps the whole exchange between you and the recipient.
How the compression works
pdfnoupload analyses your PDF and picks the right approach: scanned, image-heavy pages are downsampled, while text-based PDFs are optimised structurally — all locally, using WebAssembly. You get a noticeably smaller file that still reads cleanly, ready to attach. Once the page has loaded, it even works offline.
Frequently asked questions
Is my PDF uploaded to compress it?+
No. Compression runs in your browser; you can verify there are no uploads in DevTools → Network.
Will it get under 25 MB?+
Most oversized PDFs compress well below common email limits; the exact result depends on the content, especially scanned images.
Does compression hurt quality?+
Text stays sharp; image-heavy pages are downsampled to save space, which you can weigh against the size you need.
Is there a watermark or limit?+
No watermark and no daily cap — compress and download for free.