Initializing secure environment…
Initializing secure environment…
Send a stack of PDFs as one attachment. Add every file, name the archive, and get a single ZIP containing all of them in the order you added them. Folders can be created inside the archive to keep a batch organised — sorted by the source filename or by an index you set. Nothing is uploaded: the archive is built in this tab from bytes already on your machine, so it keeps working offline. No account, no watermark, no compression of your documents inside the archive.
To combine PDFs into one ZIP free, add all the files, optionally name the archive, and press Create ZIP. The archive is assembled in your browser — nothing is uploaded, there is no sign-up and no watermark.
Because PDFs are already deflated internally. Zipping them again is like compressing a compressed file — you burn CPU for a few percent. A ZIP is still the right format here, because one attachment beats twenty, but do not expect a size win from it.
A ZIP of already-compressed PDFs is already near the floor. If the bundle is over the cap, compress the PDFs before zipping rather than after — compression works on the images inside each document, and the ZIP cannot help with that.
Sort the archive by index rather than filename so 01-invoice.pdf precedes 02-statement.pdf even though the client will receive them alphabetically. Filename sorting would silently reorder a set that only makes sense in sequence.
Scan the receipts into individual PDFs first, keep them in date order, then bundle them here. One dated archive beats thirty attachments with receipt-IMG-4821 names that nobody can sort.
They are stored, not re-compressed. PDFs are already compressed containers, so deflating them again costs time and saves nothing. The archive is roughly the sum of the file sizes plus a few kilobytes of ZIP bookkeeping.
This tool takes PDFs. If you need a mixed archive, export the other formats first — images, Word documents or spreadsheets all have converters here — and zip the results with your operating system.
No count limit and no size limit of our own. The archive is held in memory while it is built, so a few hundred megabytes on a phone is where it gets uncomfortable; on a desktop there is no practical ceiling.
Yes, unless you rename an entry in the list, in which case the archive uses your new name. Duplicate filenames are numbered on the way in so nothing is silently overwritten.
Yes. Choose a folder name and every file goes inside it, which is what mail servers and shared drives prefer because it avoids a hundred loose files at the top level.
No. Standard ZIP encryption is weak and this tool does not pretend otherwise. If you need a password on a bundle, the honest approach is an encrypted archive from a tool that does AES — and this site will not hand you a ZIP that claims to be secure when it is not.
Yes. After the first visit the archive is built entirely from local bytes, with no network involved at any point.
Yes. Free, no sign-up, no watermark, and no limit on the number of documents in the archive.
More essential pdf tools — all free, no upload.