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Compress PDF Online Free — Reduce PDF Size

Free compress pdf online — Reduce file size while keeping pages readable. Also useful when you need reduce PDF size. Private browser processing, no account required.

PrivateLocalMax 100MB
Set a target size in KB/MB, or pick a quality level. Works best on scanned / image-heavy PDFs — we never return a file larger than your original. Upload multiple PDFs, then download each or a ZIP.
How do you want to compress?

Target file size

We'll compress as close as possible to your goal (never larger than the original).

About this tool

About Compress PDF

Compress PDF reduces file size so documents are easier to email, upload, or store. Processing stays on your device, and the tool aims to keep pages readable while lowering weight. People also look for reduce PDF size.

Compress PDF is part of Free Converter Tool — a private, browser-first toolkit for PDF, image, video, audio, and everyday utilities. Use compress pdf online free without installing software.

  • Shrink PDFs for email attachments
  • Browser-based — no server upload
  • Designed not to produce a larger file than the original
  • Great for scanned documents and image-heavy PDFs
  • Private browser-side processing
  • No account required for core use

Why use Compress PDF?

Choose Compress PDF online when you want a free, private way to process files without uploading them to the cloud. Free Converter Tool runs Compress PDF in your browser so you keep control of sensitive documents, photos, and media. No install, no watermark on core results, and no account required to get started.

How to use Compress PDF

Follow these steps to run Compress PDF in your browser.

  1. 1

    Upload PDF

    Choose the PDF that is too large to share.

  2. 2

    Compress

    Run compression to reduce size while keeping text readable.

  3. 3

    Compare & download

    Check the new size and download the smaller PDF.

Tips for best Compress PDF results

For the best Compress PDF results, use a clear original file and avoid extremely large uploads when you can. Keep this tab open until the download finishes. If something looks wrong, try a smaller file or a different browser. Your file stays local while Compress PDF runs.

Private by design

Files stay in your browser — not uploaded to our servers.

Instant local processing

Process on this page and download results right away.

Free Compress online

No install needed for core Compress PDF use on Free Converter Tool.

Related tools

More free browser tools for the same file type.

MergeSplitPDF → WordPDF → PPTPDF → ExcelWord → PDF

Compress PDF FAQs

Common questions about using Compress PDF free online on Free Converter Tool. Common searches: compress PDF, reduce PDF size, PDF compressor, compress PDF online free.

Some visual detail may be reduced to save space, especially in image-heavy PDFs. Text-focused pages usually remain clear.
Already-optimized PDFs or text-only files may not shrink much. Scanned or high-resolution image PDFs usually compress better.
Yes. Compress PDF on Free Converter Tool is free to use in your browser with no account required for core processing.
Files are processed locally in your browser and are never uploaded to our servers. Nothing is stored after you close the tab.
Open the Compress PDF page, upload or drop your file, choose any options you need, then process and download the result — all on this page.
No. Compress PDF runs in a modern browser (Chrome, Edge, Firefox, Safari). There is nothing to install or update.
Yes. Compress PDF is designed for private, browser-side processing so your file stays on your device instead of being sent to a server.
Images and audio up to 50 MB, PDFs up to 100 MB, and videos up to 500 MB. For the best speed, keep files reasonably sized for your device.
Yes. Compress PDF works on mobile browsers. Large files may process faster on a desktop or laptop.
No. Free Converter Tool does not add a watermark to results from Compress PDF for normal use.
Free Converter Tool keeps Compress PDF private and free in the browser — no signup wall for core tools, and your files are not uploaded to our servers.