Compress PDF

Shrink PDF size — pick a level, download. Your file is deleted after. · used 2 times

Uploaded only for the moment it’s processed — then deleted instantly. Not stored, not kept “for an hour”, not seen by anyone. The second the job’s done, your file is gone.

PDF file

Drop a PDF here or browse Up to 50 MB · compressed on our server, then deleted

Run the tool first — there’s no result to send yet.

How to compress a PDF

Add your PDF, pick a level — Recommended suits most files, Smaller squeezes hardest (lower image quality), Higher quality keeps more detail — and press Compress. You will see the before and after size, and the smaller file downloads. If a PDF is already optimised, you get the original back rather than a larger one.

Compress PDF — TechWhack Score

8.3/10

Privacy 7/10

Compressing a PDF needs a server, so your file is processed there and deleted the instant you download — never stored.
Speed 8/10

A quick server pass returns your smaller file in seconds.
Features 8/10

Pick Smaller, Recommended or Higher quality — and if it can’t shrink the file, it hands back your original instead of a pointless re-save.
Free 10/10

No sign-up and no paywalled “strong” tier — every level is free.

Verdict: Honest compression: it deletes your file the moment it’s done, never paywalls the strongest setting, and won’t pretend to shrink a PDF it can’t.

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Compressing a PDF reduces its file size by down-sampling images and stripping waste, so it is easier to email or upload. Choose a level — smaller, recommended, or higher quality — and download the result. Your file is processed on our server and deleted immediately after.

How the compression works

Your file runs through Ghostscript on the server, which re-encodes embedded images to the chosen resolution and removes redundant data. It is processed in a private temp area and deleted the instant the download is sent — nothing is stored or logged.

FAQ

How can I compress a PDF without losing quality?Pick the lighter level for documents where you want changes to stay invisible, and a stronger level when you need the smallest file. Compression mainly re-encodes images and strips redundant data, so text-heavy PDFs shrink less than image-heavy ones; choose the level that balances size against how sharp the images need to stay.

Why did my PDF barely get smaller after compressing?PDFs shrink mostly by re-compressing images, so a file that is mainly text or vector content has little to remove. If the tool cannot make a file meaningfully smaller, it returns the original unchanged rather than producing a larger or degraded copy.

What is the largest PDF I can compress?Files up to about 50MB are supported. The file is processed on a server and then deleted immediately after you download the result, so larger scans and image-heavy reports are handled without keeping anything afterward.

What is the difference between lossless and lossy PDF compression?Lossless compression removes only redundant data and repeated patterns, so quality is untouched but savings are modest. Lossy compression reduces image resolution and detail for much smaller files; the stronger levels lean lossy, which is why image quality drops as you push the size down further.

Is it safe to compress a confidential PDF here?The file is sent to a server only for processing and is deleted right after your download, with nothing retained. For highly sensitive documents that must never leave your machine, an in-browser tool is preferable, but for routine compression the immediate deletion keeps exposure brief.