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Upload your PDF to PDFTash above. Most PDFs compress by 70–90% in one pass. A 10MB PDF becomes 1–2MB — easily under any email provider's limit.
Gmail allows attachments up to 25MB total per email. However, for reliability, Google recommends keeping attachments under 10MB. Corporate Gmail accounts (Google Workspace) may have lower limits set by the admin.
For the vast majority of documents, no. Text is always crisp (it's vector). Images may have marginally lower resolution but look identical on screen and when printed on A4 paper.
Yes. PDFTash works in any mobile browser — Safari on iPhone, Chrome on Android. Upload, compress, download, and attach to your email app in under a minute.
That works too, but attachments are often preferred in professional settings. If you need an actual attached PDF, compressing with PDFTash is the fastest solution and doesn't require the recipient to have a Google account.