Compress PDF files online
Most oversized PDFs are oversized because of the images inside them. Compression re-encodes those images at a resolution and quality you choose, so you can trade exactly as much sharpness as you are willing to lose — and see the result before committing to it.
Private by design: your files are held in your browser. Anything processed on the server is deleted within the hour, automatically — we keep no copies.
How to compress PDF files online
Open the file, click Tools, then Compress.
Pick a level — low, medium, high, or set a custom DPI and quality.
Apply, compare the before/after size, then keep it as a new file or replace the original.
Questions
- How much smaller will my file get?
- It depends entirely on what is inside. Image-heavy scans often drop by 60-90%. A text-only PDF is already compact and may barely change — that is expected, not a failure. The before/after comparison tells you before you commit.
- Will the text stay sharp and selectable?
- Yes. Text is not rasterised, so it stays selectable and searchable at full sharpness. Compression works on the embedded images.
- What if the result looks too rough?
- Discard it and try a lower level, or set a custom DPI. Nothing is overwritten unless you explicitly choose to replace the original.
- Do my files stay private?
- Yes. Your files are held in your own browser, not in an account on our servers. When a tool has to run server-side, the file is staged for the few seconds the operation takes and then deleted — everything is purged within an hour at the latest, automatically. We store no copies and nothing that identifies you.
- Is it really free, and are there watermarks?
- It is free and it adds no watermark of its own. There is no page limit, no daily quota and no paid tier holding features back.