PDF Size Compressor (KB/MB)
Reduce PDFs to a target file size
The essentials
The PDF Size Compressor hits an exact file-size limit — 500 KB for a visa portal, 2 MB for email — by automatically tuning page quality until your document fits.
How to use it
- Upload your PDF.
- Type the target size and choose KB or MB.
- Run the compression — the tool searches for the best quality that fits.
- Download the PDF, guaranteed at or under your limit.
Pro tips
- Check the portal's exact limit (some count KB as 1000 bytes, others 1024) and aim slightly below.
- Very small targets on long documents require aggressive page simplification.
- Keep the original if you need selectable text — compressed pages are rebuilt as images.
Behind the result
The tool searches for the best page quality that fits your limit: it rebuilds pages, measures the actual output bytes, and iterates until the PDF is at or under the target — never returning a bigger file than you started with.
A worked example
A visa portal caps uploads at 500 KB.
- Input
- A 4.6 MB PDF of supporting documents.
- Output
- A 487 KB PDF that passes the portal's size check.