Compress PDF. Smaller file, no upload.
Shrink a bulky PDF on your own device — strong recompress for the biggest savings, or a lossless re-save that keeps text selectable. Everything runs in your browser; nothing is ever uploaded.
A free online tool by Digital HeroesLower = smaller file, softer pages. Pages are rasterised (text becomes an image and is no longer selectable).
Shrink a PDF without the upload
Most “free” compressors push your document to a server before they touch it. This one does the work entirely on your device. Recompress rasterises every page to a JPEG at the quality you choose and rebuilds the PDF for the biggest possible size reduction — ideal when a scan or image-heavy deck is far too large to email. Optimize losslessly re-saves the file structure with object streams, giving a modest saving while keeping every font, vector and selectable text intact. Pick a preset or dial the JPEG quality yourself, watch the before/after numbers, and download in one click. Instant, fully private, offline-capable once loaded. No sign-up, no size limits, free forever.
Everything a PDF compressor should do.
- Recompress for big savings — every page is rendered and re-encoded as JPEG, then a brand-new PDF is rebuilt for the maximum size reduction.
- Optimize and keep text selectable — a lossless re-save keeps fonts, vectors and searchable text fully intact.
- Pick a quality preset — Low, Recommended or High — or dial in your own JPEG quality with the slider.
- See exactly how much you saved with a before/after size comparison and a reduction percentage.
- Download the result in one click, named to match your original file with a clear suffix.
- Stay completely private — no file ever leaves your browser, no account needed, no size limit.
Five steps, no manual.
- Drop your PDF onto the zone, or click to browse. It never leaves your device.
- Choose Recompress for the biggest size reduction, or Optimize to keep text selectable.
- For recompress, pick a quality preset or fine-tune the JPEG quality slider.
- Click Compress PDF and wait a moment while your pages are processed.
- Download the result — the size saving is shown right on screen.
Frequently asked questions.
Is the Compress PDF tool free?
Is it private? Is my PDF uploaded anywhere?
Does it work offline?
What is the difference between Recompress and Optimize?
Why did my file barely shrink in Optimize mode?
Do I need to install anything or create an account?
Published · Last updated .