Sending a PDF by text message is possible but comes with size constraints that make it less straightforward than sending by email. SMS messages can't carry attachments at all. MMS (multimedia messaging) supports files but has strict size limits โ typically 1-3MB depending on the carrier. Most real-world PDFs exceed this. Here's what actually works.
The Size Problem With MMS
Standard SMS text messages have no file attachment capability at all. MMS โ which enables photos, videos, and files via text โ exists but carriers typically limit MMS attachments to 1-3MB. A PDF of a contract, a report, or a scanned document almost always exceeds this. Even a short document with a few images can easily be 5-10MB.
Before trying to send a PDF via MMS, check its size. If it's under 1MB โ a text-only document with no images โ MMS may work directly. If it's larger, you'll need to either compress it first or use a different delivery method.
Option 1: Compress First, Then Send as MMS
For small PDFs that can be reduced to under 1MB, PDF Compression is the fastest path. WukongPDF at www.wukongpdf.com reduces most PDFs significantly โ upload, compress, download the smaller version. If the compressed result is under your carrier's MMS limit, attach it to a text message and send.
On iPhone, attach the compressed PDF from the Files app: tap the attachment icon in Messages, select the file from Files, and send. On Android, the process is similar โ tap the attachment icon in your messaging app and select the PDF from your storage. The recipient receives it as an MMS attachment they can open directly on their phone.
Option 2: Send a Link Instead of the File
For larger PDFs, the most reliable approach is to upload the file to cloud storage and send a link via text. Upload the PDF to Google Drive, Dropbox, or iCloud Drive, generate a shareable link, and paste the link into a text message. The recipient taps the link and views or downloads the PDF on their phone.
This works for any file size and any carrier โ links in text messages have no size restrictions. The tradeoff is that the recipient needs internet access to view the file, and if the link expires (some sharing services generate time-limited links), the PDF becomes inaccessible. For important documents, use a permanent link from Google Drive or Dropbox rather than a temporary link from a file transfer service.
Option 3: Use iMessage or WhatsApp
iMessage (iPhone to iPhone, shown in blue) and WhatsApp both support larger file attachments than standard MMS. iMessage supports attachments up to 100MB โ large enough for almost any PDF. WhatsApp supports attachments up to 100MB for documents. If you and the recipient both use either of these platforms, sending a PDF as an attachment works without compression or cloud links.
On iPhone, in iMessage: tap the + button, select Files, navigate to the PDF, and tap to attach. The recipient receives it as an attachment they can view inline or save to their Files app.
On WhatsApp: tap the paperclip icon, select Document, and choose the PDF from your storage. WhatsApp sends it as a document attachment that the recipient can open directly in the app or save to their device.
The Simplest Decision Guide
- PDF under 1MB: try sending directly as MMS attachment
- PDF 1-10MB and can be compressed below 1MB: compress with PDF Compression then send as MMS
- Both parties use iMessage or WhatsApp: send directly as attachment โ no size issues
- Large PDF or unknown recipient platform: upload to Google Drive and send the link as a text message