Attach a photo or a PDF to any message using Attach photo or PDF.
What's allowed
- Photos (JPEG, PNG, WebP) and PDFs
- Checked by content, not by filename — renaming a file to .pdf doesn't get it through
Each file's fingerprint is recorded alongside the message, so an attachment can be shown later to be the same file that was sent.
Attachments are part of the record too. They can't be removed once sent.