How to send images, PDFs and files to multiple WhatsApp contacts

Ways to send images and PDFs to multiple WhatsApp contacts

On your phone you can attach a file to a broadcast list or forward it to a few chats. Both work, with the same limits as text: broadcast lists only reach people who saved your number, and forwarding is capped to a few chats at a time.

To send images, PDFs and other files to multiple WhatsApp contacts from a list, a WhatsApp Web tool attaches the file in each chat for you.

Files are where manual sending becomes really slow: open the chat, click attach, find the file, wait for upload, type the caption, send, and repeat for every customer. For twenty customers that is easily half an hour of clicking, with a real risk of attaching last month's file by mistake.

A campaign with an attachment removes that repetition: you choose the file once, write one caption with variables, and the same file goes to every chat in the list at the pace you set. You still see each chat open and each message appear, exactly as if you had sent it yourself.

What you can attach in Wassender

A campaign can include an image, a video or a document such as a PDF, with an optional caption. The caption can use the same variables as a text message, so the file can arrive with "Hi [name], here is the new price list".

WhatsApp's own size limits for media and documents still apply, because the file is sent through your WhatsApp Web account.

Prepare the file

Keep images clear but not huge, and name documents in a way that makes sense to the customer, such as price-list-november.pdf rather than final_v3.pdf. The file name is visible to the person who receives it.

Test the attachment by sending the campaign to your own number first, and open it on a phone to see how it looks.

Personal files for each customer

If every customer needs a different image, such as their own invoice or a personalized card, see the personal images guide: Wassender can match a file to each row instead of sending one file to everyone.

Example campaigns with files

Price list: attach price-list-november.pdf with the caption "Hi [name|there], here is our updated price list for November. Reply with the item code and quantity and we will confirm availability today." Customers can forward the PDF to colleagues, which plain text cannot do as neatly.

New stock: attach one clear photo of the collection with "{Hi|Hello} [name], the new [category|collection] just arrived. Want us to hold your size?" One strong photo usually works better than an album; if you need several images, send a link to your catalog in a follow-up only to those who reply.

Event or class: attach the timetable as an image rather than a PDF when most people read on their phone, because an image opens instantly inside the chat. Use a PDF for anything people need to print or keep, such as a contract, an invoice or a menu.

Common mistakes with attachments

Huge files: a 25 MB scanned PDF is slow to send and slow for the customer to download on mobile data. Export or compress it to a smaller size before attaching.

Text inside the image only: if the price or date exists only in the picture, customers searching their chats later will not find it. Repeat the key detail in the caption.

Wrong file for the wrong people: sending the wholesale price list to retail customers happens when two lists are mixed. Keep one campaign per audience, and check the confirmation count and preview before you start.

Testing on desktop only: a file can look fine on a wide screen and be unreadable on a phone. Always open your test message on a phone first. If a recipient fails, read the note in the log before retrying, rather than restarting the whole campaign.

Image, video or PDF: which to choose

Images are the quickest to view. They open inside the chat, show up in the customer's media gallery and are ideal for a product photo, a poster or a short timetable. Keep the important text large enough to read on a small phone screen, and repeat prices or dates in the caption so they can be searched later.

Videos show a product in use or a quick walkthrough of a service, but they are larger and take longer to send and to download. Keep them short, a few seconds to under a minute, and only send video to customers who have engaged with you before. A good caption explains what the video shows in one line, so people know whether to play it.

PDFs suit anything with several pages or that people need to keep: price lists, catalogs, menus, contracts and invoices. Give the file a clear name, keep the size reasonable and put a short summary in the caption, for example "Our November price list, 3 pages". When every customer needs their own document, such as an invoice, use the personal images approach so each row gets its own file instead of everyone receiving the same one.

Pace and consent still matter

Messages with files take a little longer to send. Choose a careful pace and a daily limit for large lists, and send files only to people who expect them; an unexpected PDF from an unknown number is a common reason people report a chat.

Step by step

1. Open WhatsApp Web with Wassender and start a campaign.
2. Import your list or choose recipients.
3. Use the attachment control to add an image, video or PDF.
4. Write a caption with variables such as [name].
5. Send a test to your own number, then pick a pace and start.

Plan: Every new account gets 1 hour of Unlimited free from its first campaign, no card needed. After that, sending needs a paid plan: US$9.99 a month, US$79 a year or US$99 once for Lifetime. Nothing renews unless you switch on auto-renew for Monthly at checkout, and you can cancel that anytime.

Frequently asked questions

Keep reading

• Personal images guide →
• Campaigns guide →
• Send one message to many contacts →