Real numbers
The size you see before the download is the size of the file you download.
Compress PDF
Make PDF files smaller.
Import your PDFs
PDF
Related tools
How to compress a PDF
The video could not load. You can still follow the instructions below.
Drop one or more PDFs, or select them.
Compress PDF options
Photos
Recommended brings photos to 150 dpi, Strong to 110 dpi. Text stays sharp.
Lossless
Lossless keeps every pixel and only packs the file better.
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Target size
Type a size such as 1 MB. When a file cannot get that small, you see the smallest size it can reach.
Never bigger
A file that would not get smaller stays as it was.
Signed files
A digitally signed file is marked before you compress it, because a new file no longer carries a valid signature.
Frequently asked questions
How do I compress a PDF?
Drop your PDF and choose a level. The new size shows on the file. Select Compress, then Download.
Which level should I choose?
Recommended suits most files. Strong makes photos smaller still. Lossless changes nothing you can see.
Can I compress several files?
Yes. Each file is compressed on its own, and you download them together as a ZIP.
Are my files uploaded?
No. The files are processed in your browser and never leave your device.
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Is it free?
Yes. No account, no usage limits and no watermark.
Technical details
Processing
The files are compressed in a background worker in your browser. Photos are re-encoded as JPEG with mozjpeg, every stream is packed again, and unused objects are removed.
What stays
Links, bookmarks, form fields, attachments and metadata stay in the file.
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Limits
CMYK photos and some image formats are kept as they are. A digital signature is no longer valid after compression.