Compress
PDF Compressor
Reduce PDF size in your browser with honest limits.
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Basic
What it is & how to use it
Shrink PDF payloads for email and portals. Browser-local compression has honest limits versus heavy server pipelines.
How to use the PDF Compressor
1) Drop a PDF.
2) Choose compression strength if offered.
3) Compare output size and open once to verify readability.
4) Keep the original archive.
Intermediate
Formula & worked example
Size reduction depends on embedded images and structure — not a fixed ratio.
Practical rule: image-heavy decks shrink more than text-only docs.
Advanced
Interpretation, edge cases & next steps
Aggressive compression can blur fine print.
Advanced: merge/split first if you only need part of a file; use hosted OCR suites when you need deep rebuilds and accept uploads.
See Compare.
Go deeper: Browser-Local Tools vs Upload Suites
Frequently asked questions
Are files uploaded?
No — designed for in-browser processing.
Guaranteed size?
No — results vary by content.
Scanned PDFs?
May need different tooling (OCR) than light compress.
Limits?
Respect MB/page caps in the UI.
Password PDFs?
Unlock first.
Deep guide
Read the full guide
Longer teaching, worked scenarios and mistakes — then jump back into this tool with example numbers.