Compress PDF
Reduce a PDF’s file size by re-rendering its pages as optimised images, at a quality level you choose. Best suited to scanned or image-heavy PDFs, where it can cut the size dramatically. Runs fully in your browser — the file is never uploaded.
🔒 100% private — this tool runs in your browser; files are never uploaded.
How it works
- Add your PDF. Drop a PDF onto the page. It is read locally in your browser.
- Pick a quality level. Choose High, Balanced, or Strong compression. Stronger settings produce smaller files with softer image quality.
- Compress and download. Click Compress. Each page is re-rendered and re-packed in your browser, and you see the before/after size before downloading.
Honest limitations
- Output pages are images — text becomes non-selectable and non-searchable.
- Text-only PDFs may not shrink (the tool tells you instead of silently delivering a bigger file).
- Encrypted PDFs must be unlocked first.
Frequently asked questions
How does the compression work?
Each page is re-rendered as an optimised JPEG image and re-packed into a new PDF. That is why it works so well on scans — and why text in the output is no longer selectable. If you need selectable text, keep the original alongside the compressed copy.
Will it always make my PDF smaller?
No — and we show you the before/after size instead of pretending. Text-only PDFs are already compact and can even get bigger when rasterised; the tool warns you when the result is not smaller.
Is my PDF uploaded?
No. Rendering and re-packing run entirely in your browser.
More free tools
- Merge PDF — Combine several PDFs into one file — private, in your browser.
- Split PDF — Extract pages or page ranges from a PDF into a new file.
- JPG to PDF — Turn JPG and PNG images into a single PDF document.
- PDF to JPG — Turn each page of a PDF into a downloadable image.
- Rotate PDF — Rotate the pages of a PDF and save the result.
- Delete PDF Pages — Remove unwanted pages from a PDF and keep the rest.
- CSV to Chart — Paste or drop a CSV and get a clean, downloadable chart.
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