Compress PDF
AADDYY’s Compress PDF makes PDF files smaller, right in your browser. Basic keeps text and links and re-compresses photos; Strong turns pages into images for the smallest files; or type a target such as 100 KB or 200 KB. Compress up to 10 PDFs at once, free, and nothing is uploaded.
- Free, no sign-up
- Files never leave your device
- No watermark, no daily limit
Processed on this device0 bytes uploaded
Drop PDFs here.
or choose files from your device
PDF · up to 10 files · up to 200 MB each
How it works.
Add your PDFs
Drop up to 10 PDF files onto the page or choose them from your device. Password-protected files ask for their password.
Choose how small
Basic keeps text selectable. Strong goes further by turning pages into images. Target size aims for a limit such as 200 KB and keeps text if it can.
Compress and download
Select Compress. You see the size before and after for each file, and can download them one by one or together as a ZIP.
Options, explained.
- Basic
- Re-saves the PDF compactly: drops unused and editor-only data, packs the file structure, and re-compresses photos that hold more detail than a page needs at 150 dpi. Text, links, bookmarks and form fields stay as they are.
- Strong
- Turns every page into a JPEG image at 72, 100 or 150 dpi, so scans shrink the most. Text can no longer be selected, searched or copied, and links and form fields stop working.
- Target size
- Aims for the size you need, such as 100 KB, 200 KB, 500 KB or 1 MB. It tries Basic first, so text is kept when that is enough, and only then turns pages into images, at the best quality that fits.
- Results
- Every file shows its size before and after. If a file can’t be made smaller, you get the original back unchanged, password and all. Files that do get smaller are saved without a password.
Private by design.
Compress PDF runs entirely in your browser. Your files are read into this tab’s memory, processed by code running on your device and saved straight back to it. Nothing is uploaded, so there’s no queue to wait in and nothing to delete afterwards.
Like the rest of AADDYY, this page counts visits with analytics. The tool area is hidden from session recordings, and usage events record only counts and sizes, never file names or contents.
- Read from your deviceyour files
- Processed in this tabon-device
- Saved back to youdownload
- Sent to a server0 bytes
Questions.
Is Compress PDF free?
Yes. There’s no sign-up, no daily limit and no watermark, and you can compress up to 10 PDFs at a time.
Are my PDFs uploaded?
No. Compression runs in your browser, on your device. No file data is sent to AADDYY or anyone else.
How do I compress a PDF to 100 KB or 200 KB?
Choose Target size and pick 100 KB or 200 KB, or type your own limit. The tool first tries to get there while keeping text; if it can’t, it turns pages into images at the highest quality that fits. If even that isn’t small enough, you get the smallest version with a note.
What’s the difference between Basic and Strong?
Basic rewrites the file and re-compresses its photos, so text stays selectable and links keep working. Strong replaces each page with an image: files get much smaller, especially scans, but text can’t be selected or searched afterwards.
Why did my PDF barely shrink?
PDFs made mostly of text and drawings are already compact, and Basic changes only what it can without a visible loss. Strong or a target size helps most with scans and photo-heavy files; for text documents the saving is usually small.
Will compression reduce the quality?
Basic keeps text and drawings exactly as they are and re-compresses only large photos, which can soften them slightly. Strong and small targets lower the resolution of the whole page, so check small print before you send the file.
Can I compress a password-protected PDF?
Yes, if you know the password. Enter it when asked; it’s used only in your browser, and the compressed file is saved without a password. If the file can’t be made smaller, you get your original back, still with its password.
Does it work for scanned documents?
Yes. Scans are usually large photos of pages, which is where compression saves the most. When Strong or a target size turns pages into images, pages with no colour are saved in greyscale, which makes them smaller still.
