How to back up WhatsApp documents, photos and media from your computer
Keep the PDFs, photos, videos and voice notes from your WhatsApp chats in an encrypted backup on your computer, next to the messages they came with.
Kaption AI·Updated November 9, 2026
A lot of real work arrives on WhatsApp as files. Invoices as PDFs, photos of a signed page, a video of a damaged shipment, a voice note with instructions. Saving them one by one from WhatsApp Web works for a single file. It does not work for a year of chats.
This article shows how to keep your WhatsApp documents and media in an encrypted backup on your computer, still attached to the message and the chat they came in, and what to expect from it.
Updated November 2026
Why saving files one by one falls short
You lose the context. A PDF in your Downloads folder doesn't say who sent it, in which chat or why.
It's manual. Nobody saves every file from every customer.
WhatsApp's backup is for the phone. It restores media onto a phone. You can't browse it on a computer.
Media in a Kaption backup
Kaption Backups keeps one password-encrypted backup file of your WhatsApp chats in a folder you choose. It works in WhatsApp Web with the Kaption extension for Chrome and Edge, and in the Kaption desktop app for Mac and Windows.
On paid plans, the backup can include media:
Photos and videos
Voice notes and audio
Documents: PDFs, spreadsheets, Word files and other attachments
Each file stays inside its chat, next to its message and caption. On Free, a backup holds messages and voice-note transcripts, and media shows as a placeholder. See pricing for what each plan includes.
How to turn it on
Open Backups in Kaption and pick a folder: one inside iCloud Drive, Google Drive or OneDrive, or on an external drive.
Set a password of at least 10 characters. Nobody, not even Kaption, can open the file without it. There is no recovery.
Turn on continuous backups (paid plans).
Keep Include photos, videos, voice notes and documents on. It is on unless you turn it off.
When you turn media on, Kaption adds the media already on that computer, then keeps adding new media every hour with the rest of what changed.
A note on file size
Media makes the backup much bigger than text. The switch shows the file's size, so you can see how it grows. If space is tight, turn media off: Kaption stops adding new media and keeps what the file already holds. The same photo is stored only once, even if it was sent in several chats.
Finding and opening a document later
Choose View backup, type the password, and the backup opens read-only in a new tab, laid out like WhatsApp:
Use the With media filter to see chats that have files.
Search every chat and transcript for the name of a customer or a document.
A document shows its type, name and size, with Open and Save when the file is in the backup.
Photos open larger on click. Videos play from the backup. Voice notes play, with their transcript under them.
The file is decrypted in memory on your computer. Nothing is uploaded.
What to expect
Older media may be partial. Kaption fetches each file through WhatsApp. If a file is no longer available, the backup may hold only WhatsApp's small preview, marked "Full image not in this backup".
It is view-only. You can open and save files from the backup, but it can't put them back into WhatsApp.
It keeps what it saved. If a sender deletes a file after it was backed up, the backup still has it.