WhatsApp did not blur your contract. You sent a photograph of a page, and the app compressed it the way it compresses every chat photo. Fine print, stamps, and signatures go first. Attach the file as a Document instead. The other person then gets a real .pdf they can open, zoom, and print.
WhatsApp's help pages say a document can be up to 2 GB. That is far larger than almost any PDF people actually send. When a transfer fails, the usual causes are a dropped connection, a full phone, or attaching a screenshot from the gallery.
Send it as a Document
On Android
- Open the chat.
- Tap the attachment icon (the paperclip).
- Choose Document, not Gallery or Camera.
- Browse to the PDF in Downloads, Files, or Drive, then send it.
On iPhone
- Open the chat.
- Tap the + button beside the message field.
- Choose Document.
- Pick the file from Files, iCloud Drive, or another location WhatsApp lists, such as Google Drive or Dropbox if you use them.
WhatsApp's iPhone help text states that a document can be up to 2 GB.
On WhatsApp Web or desktop
- Open the chat in the browser or desktop app.
- Click the paperclip.
- Choose Document and select the PDF from your computer.
If the chat already shows a photo thumbnail of one page, you sent an image. Delete that message if you can and resend the file through Document. A real PDF attachment shows a filename that ends in .pdf.
If you already have a PDF, stop there
You do not need OurPDFPal, or any converter, if the file on your phone already ends in .pdf and opens cleanly. Just attach that file. Running it through a website wastes one of the five free conversions the site allows each day and does not change how WhatsApp treats a proper document.
When all you have are photos of pages
That is the usual mix-up. You photographed a form, so what you have is a set of JPEGs. Sending those pictures one by one looks messy and loses quality.
- Open JPG to PDF.
- Upload the photos (JPG, PNG, or WEBP; up to 30 images and 80 MB total). Drag the thumbnails into the right order.
- Choose A4 or Letter if a school or office named a page size. Choose Fit to image if you want each photo to keep its own shape.
- Press Create PDF, download the file, and send that PDF as a WhatsApp Document.
iPhone photos are often saved as HEIC. The website converter does not accept HEIC, so export those shots to JPG or PNG first, or use the OurPDFPal Android app, which can read HEIC. There is a separate walkthrough on converting iPhone photos to PDF.
The file that works in chat and fails in email
A 40 MB scan may crawl through WhatsApp on a slow connection, then fail the moment someone forwards it by email. Personal Gmail accounts cap attachments at 25 MB, according to Google's Gmail help.
- Run a heavy scan through Compress PDF (files up to 120 MB). Start with Medium (E-book). Use Low (Smallest File) only if you still need a smaller copy and the text stays readable.
- If only some pages matter, use Split PDF and send those pages.
- If you created the file yourself, export a fresh PDF from Word or Google Docs instead of photographing a printout.
There is a longer guide on compressing a PDF for email. If the next stop is a job or school portal, see what to do when a portal says your PDF is too large.
One extra note: software that sends WhatsApp messages through the WhatsApp Business Platform (the Cloud API used by some business inboxes) lists a 100 MB maximum for PDF documents in Meta's developer documentation. That cap applies to those integrations, not to a person attaching a file in the regular WhatsApp app.
A quick check before you tap Send
- The attachment shows a document name ending in .pdf, not a photo of one page.
- You opened the file yourself and can read small text and signatures.
- Pages are in the right order and none are upside down. Fix rotation with Rotate PDF if needed.
- You are comfortable sharing that document in a chat. Chats can be forwarded. For IDs or contracts, ask whether a portal or email is more appropriate, and consider locking the file as described in how to password protect a PDF.
If you used the website to build the file, download it before you close the tab. Temporary uploads are cleared after about 15 to 20 minutes.
Frequently asked questions
Does WhatsApp compress PDF files?
If you send the PDF as a Document, WhatsApp keeps it as a file rather than recompressing it the way it does with chat photos. A screenshot or a photo of the page is treated as an image, and the quality usually drops.
What is the WhatsApp PDF file size limit?
WhatsApp's help center says documents can be up to 2 GB when you attach them from the Document option in the app or on WhatsApp Web. Some business systems that send WhatsApp messages through Meta's Cloud API list a 100 MB limit for PDF files.
Why can't my contact open the PDF I sent?
They may have received a photo instead of a file, their phone storage may be full, or the download may have been interrupted. Resend the same PDF using Document, and ask them to open it with a PDF viewer after it finishes downloading.
Should I send each page as a photo so it loads faster?
That is usually worse for anything official. Photos get compressed, page order is easy to mix up, and the recipient cannot save one tidy document. Convert the pages to a single PDF and send that file.
Liked this? Explore more tools like PDF to Word, Compress PDF, and Merge PDF.