Compress PDF
Scans and photo-heavy PDFs cut down to size — text untouched, compressed on your own device.
Drop your PDF here
or
One PDF — any size, no upload
🔒 Files never leave your device — everything runs in your browser.
A heavy PDF is almost always heavy because of its images — scans, photos, pasted screenshots. This tool shrinks exactly that: the images inside are downscaled and re-encoded at your chosen strength, while text and vector content are never touched — they stay razor-sharp and selectable, byte for byte.
That focus is also this tool's honesty: a text-only PDF is already compact, and instead of pretending otherwise, the tool hands your original back unchanged and says so. Compression never produces a bigger file than you dropped in — and the document never leaves your device, which matters when it is a contract or an ID scan.
How it works
- Drop your file
Any common format, any size. Nothing is uploaded — the tool runs in your browser.
- Run the tool
One click does the work for compress pdf — pages are processed right in your browser, in order.
- Download
Your converted file is ready on your device — nothing to wait for, nothing to delete from a server.
Frequently asked questions
How much smaller will my PDF get?
It depends entirely on the images inside. Scanned documents and photo-heavy reports routinely shrink 40–70%; a PDF that is mostly text has little to compress, and the tool returns it unchanged rather than inflating it.
Will the text get blurry like other PDF compressors?
No — that blur happens when tools rasterize whole pages. This one re-encodes only the embedded images; text and vector graphics are not touched at all, so they print and zoom exactly as before, and the text stays selectable.
Which strength should I pick?
Balanced suits nearly everything — documents stay clearly readable at a fraction of the size. Use Light when the images themselves matter (portfolios, photography) and Strong when small size beats image finesse, like email attachment limits.
Is my file uploaded to a server?
No. ConvertUno runs entirely in your browser on your own device. Your file never leaves your computer or phone — there is no upload at all.
Is it really free, with no watermark?
Yes. Processing happens on your device, so serving you costs us almost nothing — no watermark, no account, no file-size limit, no daily quota.