Compress Many PDFs in One Go
When a whole set of scans, invoices or reports is too big to email or upload, compressing them one by one takes ages. Batch PDF runs the same compression on every file in turn and keeps a running list, so you can download each PDF or all of them as a ZIP. A file that can't get any smaller keeps its original size, and nothing ever leaves your device.
Your file is processed by your own browser and never uploaded. Most online tools send your document to their servers and delete it later — this one never receives it at all.
Why use Compress Multiple PDFs
- Ten actions: compress, watermark, page numbers, rotate, grayscale, resize, protect, unlock, remove metadata and flatten
- Up to 50 PDFs per batch, processed one at a time with a live progress list
- Old and new size shown for every file
- Download files one by one or all together as a ZIP
- A file that fails is listed with the reason, and the rest still finish
- Processed on your device, never uploaded
Popular uses
- Compress a month of scanned receipts or invoices before sending them to an accountant
- Stamp CONFIDENTIAL or DRAFT on every report in a folder
- Password-protect a set of statements with the same password
- Remove author names and dates from documents before publishing them
Compress Multiple PDFs: frequently asked questions
How many PDFs can I compress at once?
Up to 50 per batch. They're compressed one after another in your browser, with a list showing each file's old and new size. For more, start another batch when the first one finishes.
Which compression level should I pick?
Balanced suits most files: it re-compresses photos and scans at screen resolution while text, links and form fields stay as they were. Lossless only tidies the file structure, and Strong turns pages into images for the smallest size, at the cost of selectable text.
What if a PDF doesn't get smaller?
Some PDFs are already well optimized. When the compressed copy would be the same size or larger, the original is kept and marked in the list, so you never end up with a bigger file.
Can I compress password-protected PDFs?
Protected PDFs are listed with an error and skipped. Run a batch with the Unlock action first (you'll need the password for files that ask for one), then compress the unlocked copies.
Is batch compression free?
Batch PDF is part of PDFSpark Pro, along with every other tool and no daily limit. The single-file Compress tool is free, 3 operations a day, without an account.
More ways to use Batch PDF
Related tools
Batch PDF
Compress, watermark, number, rotate or protect up to 50 PDFs at once
Compress PDF
Make PDFs smaller while keeping text sharp, or hit a size like 100 KB or 1 MB
Add Watermark
Add text watermarks to your PDF pages
Protect PDF
Add password protection to your PDF
Merge PDF
Combine multiple PDF files into one document