BLOCKPACK

files → email-ready blocks

100% in-browser AES-256 optional

Pack many files into one email-sized block.

Text and images are compressed into a .blk block, auto-split into parts of 10 MB or less. Recipients drop the parts back in to restore every original file. Nothing is uploaded — your files never leave this browser.

Drop text & image files here

or click to browse — any number of files

File queue

0 files · 0 B

No files yet. Drop documents, notes or photos above.

Max allowed - fits a 10 MB attachment limit

Zero-server processing · gzip compression · SHA-256 integrity check · PBKDF2 + AES-GCM encryption when a password is set. Send the password through a different channel than the email.