Compress PDF
Reduce PDF file size right in your browser with lossless clean-up or maximum image compression. Your document never leaves your device.
Maximum mode converts each page to an optimized image: ideal for scans and sharing, but text is no longer selectable.
How to compress a PDF online
Choose a PDF, pick a mode and click Compress PDF. Maximum mode re-encodes every page as an optimized image — scanned documents often shrink by 70% or more. Lossless mode rewrites the file structure and strips unused objects while keeping text selectable. Everything runs locally in your browser: your document is never uploaded, so it is safe for contracts, invoices and IDs.
Compress PDF reduces the file size of a PDF document directly in your browser, with two modes for two very different needs. Lossless mode rewrites the internal structure of the file, packs objects into compressed streams and drops unused data — the content, text and quality remain exactly the same, which makes it ideal for text documents that just need a light trim. Maximum mode re-renders every page as an optimized JPEG at the resolution and quality you choose, which routinely cuts scanned contracts, photographed receipts and image-heavy decks by 50–90%.
Because everything runs locally, the tool is safe for sensitive paperwork: contracts, invoices, IDs and medical documents are processed on your own device and never uploaded to any server. It also works offline once the page is loaded. Typical uses include squeezing an attachment under an email limit, meeting a portal’s upload cap, or archiving scans without eating storage.
FAQ
Is this PDF compressor free?
Yes. It is completely free, with no signup, no watermark and no daily limit — the only practical bound is your device memory.
Is my PDF uploaded to a server?
No. Compression runs entirely in your browser. Your document never leaves your device, and the tool even works offline after the page has loaded once.
How much smaller will my PDF get?
Scanned documents and image-heavy PDFs typically shrink by 50–90% in Maximum mode. Clean text-based PDFs have less waste to remove; use Lossless mode on those to tidy the structure without any quality change.
Will the text stay selectable after compression?
In Lossless mode, yes — content is untouched. Maximum mode re-renders each page as an image for the biggest savings, so text is no longer selectable or searchable. Pick the mode that matches what the file is for.
How do I compress a PDF to a specific size like 1 MB?
Use Maximum mode, then lower the quality slider or the resolution until the result fits your cap. The before/after size appears right after each run, so two or three quick tries usually get you under the limit.
Why did my PDF not get smaller?
Some PDFs are already highly optimized — their images are compressed and their structure is clean. In that case Lossless mode finds nothing to remove, and Maximum mode may even produce a larger file at high quality settings. Lowering quality or resolution will still force a reduction if you need one.
Does it work with password-protected PDFs?
No. Encrypted PDFs cannot be opened by the browser without the password. Remove the protection first, then compress the file.
Is there a page or size limit?
The tool processes up to 300 pages per file, and very large documents are limited only by your device memory. A typical 50-page scan compresses in well under a minute.