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§ · free tool

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 Heroes
Drop a PDF here or click to browse
🔒 Files never leave your browser

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.

§ 02 · what you can do

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.
§ 03 · how to use it

Five steps, no manual.

  1. Drop your PDF onto the zone, or click to browse. It never leaves your device.
  2. Choose Recompress for the biggest size reduction, or Optimize to keep text selectable.
  3. For recompress, pick a quality preset or fine-tune the JPEG quality slider.
  4. Click Compress PDF and wait a moment while your pages are processed.
  5. Download the result — the size saving is shown right on screen.
§ 04 · faq

Frequently asked questions.

Is the Compress PDF tool free?
Yes — completely free for everyone. No sign-up, no account and no usage limits.
Is it private? Is my PDF uploaded anywhere?
No upload, ever. The whole thing runs in your browser on your own device — your PDF never leaves your computer and nothing is sent to a server.
Does it work offline?
Yes — once the page and its compression libraries have loaded, everything happens locally, so it keeps working without a connection.
What is the difference between Recompress and Optimize?
Recompress rasterises each page to a JPEG image and rebuilds the PDF. This gives the biggest savings, but the text is no longer selectable or searchable. Optimize losslessly re-saves the file structure, giving a modest saving while keeping text, fonts and vectors fully intact.
Why did my file barely shrink in Optimize mode?
Optimize only re-packs the PDF's structure without touching image data, so an already well-compressed file has little to gain. If you need a big reduction, switch to Recompress mode and lower the JPEG quality — the tool will tell you when a file is already tightly compressed.
Do I need to install anything or create an account?
No. Just open the page and start compressing — there is no software to install and no account to create.

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