Compress and reduce PDF file size online for free — one file or a whole batch. Files are processed entirely in your browser, so nothing is ever uploaded.
Compress PDF
Reduce PDF file size locally in your browser — single files or batches of up to 10.
Drag & drop PDF files here
or click to browse — add multiple PDFs to compress them in a batch
PDF files only — up to 50MB each
AdFrequently Asked Questions
Does compressing reduce PDF quality?
Our tool optimizes the PDF structure by removing redundant objects, enabling object streams, and compressing operators — without losing visual quality. For scanned/image-heavy PDFs, the reduction may be less than for text-based documents.
Are my files uploaded to a server?
No. All compression happens locally in your browser using pdf-lib. Files are processed in memory and never leave your device.
Can I compress multiple PDFs at once?
Yes — drop up to 10 PDFs and they are compressed one after another with live per-file status. When finished you can download each file or grab everything as a single ZIP.
What happens if one file in the batch fails?
Only that file is marked as failed with an explanation; every other file in the batch still completes normally and remains downloadable individually or in the ZIP.