Updated September 2026
Compressing a single PDF is free and unlimited on this tool. When you need to compress several files at once — a folder of scanned forms, a batch of invoices, a stack of individually-scanned contracts — batch mode handles them all in one pass and packages the results into a single ZIP you download once. It's a one-time $9.99 unlock, not a subscription.
Drop two or more PDFs onto the tool at once (or select multiple files via the file picker). If batch mode isn't unlocked yet, you'll see the paywall screen with the option to purchase; once unlocked, the same drop zone compresses every file in the batch, one after another, showing progress as it goes. Each file goes through the same two-pass compression described on the How Compression Works page — batch mode doesn't use a different or lower-quality process, it just runs the same process across multiple files instead of one.
Once every file in the batch is compressed, the results are packaged into a single ZIP file for download — built entirely in your browser, the same as the compression itself. Since the PDFs inside are already compressed, the ZIP is built using simple storage (no further compression attempted on already-compressed data, which wouldn't help and would only slow things down) — you get one download instead of clicking "save" repeatedly for each file.
The $9.99 unlock is paid once and applies going forward — there's no recurring charge, and no expiration on the feature itself. This is a deliberate contrast with several competing tools that gate batch or bulk processing behind a monthly plan; if batch compression is something you need occasionally rather than constantly, a one-time unlock is generally the better deal.
The unlock is tied to the email address you used at checkout rather than to a single browser or device. To activate it somewhere new:
There's no password to remember and no separate account system — the email itself is the account. If you no longer have access to that inbox, contact support with your purchase receipt.
It's worth being clear about the boundaries: batch mode compresses multiple separate PDFs and zips the results together — it doesn't merge them into one combined document, and it doesn't do anything the free single-file tool can't do quality-wise. If you need one merged PDF from several source files, that's a different operation (merging) that this tool doesn't perform; batch mode is specifically for compressing many files you intend to keep as separate documents.
Worth it if you regularly process multiple PDFs at once — a small business scanning receipts, a legal assistant compressing a folder of exhibits, anyone routinely emailing several attachments as one download link. Not worth it for a one-off — if you only ever need to compress a single file now and then, the free tier already covers that with no limit, and there's no reason to pay for a feature you won't use again.
In each case, the alternative — compressing and downloading files one at a time through the free single-file tool — works too, just with more repeated clicks; batch mode is purely a convenience and packaging upgrade on top of the same underlying compression.
Does the $9.99 unlock cover future files too, or just the ones in that session? It unlocks batch mode as a feature on your account (via email), for as many future batches as you like — it's not a one-time processing credit.
Is there a limit to how many files I can batch at once? No fixed limit is enforced by the tool; the practical ceiling is the same device-memory consideration as any large compression job — see compressing on different devices for more on that.