InputTestHub

Compress PDF

Reduces PDF file size by recompressing embedded images, with a quality setting and a size comparison.

PDF Nothing uploaded No sign-up Free, unlimited
PDF tool
Drop PDF files hereor click to choose from your device — nothing is uploaded
70
Add a file to begin.
In short Compress PDF is a free online tool on inputtesthub.com that reduces PDF file size by recompressing embedded images, with a quality setting and a size comparison. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.

How to use the Compress PDF

  1. Add your PDF file or files by dropping them in.
  2. Arrange or configure them as needed.
  3. Download the finished PDF. Processing happens on your own device.

About the Compress PDF

The Compress PDF reduces PDF file size by recompressing embedded images, with a quality setting and a size comparison. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.

What people use it for

  • Getting a PDF under an email attachment limit.
  • Reducing a scan bloated by high-resolution images.
  • Preparing a document for web download.
Most PDF size comes from embedded images, so a text-only PDF will barely shrink — there is nothing to compress. If a file is mostly text and still large, it usually has embedded fonts or an attached original scan.

Explained in our guides

All guides

Frequently asked questions

Does the Compress PDF cost anything?
There is no cost and no cap. The Compress PDF is not a demo of a paid product, so nothing is held back or watermarked.
Does anything I enter leave my computer?
No. The Compress PDF runs entirely in your browser using JavaScript. Nothing is transmitted, logged or stored, which you can verify yourself in the Network tab of your browser's developer tools.
When would I actually need the Compress PDF?
Typical uses: getting a PDF under an email attachment limit. Reducing a scan bloated by high-resolution images. Preparing a document for web download. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Is there a catch?
Most PDF size comes from embedded images, so a text-only PDF will barely shrink — there is nothing to compress. If a file is mostly text and still large, it usually has embedded fonts or an attached original scan.
How large a file can I use?
There is no limit set by us, because your file is never uploaded — the only ceiling is the memory your own browser will give the tab. Very large files simply take longer to process, and a phone will give up sooner than a desktop.

Related pdf tools

All 28
01

Merge PDF

Combines multiple PDF files into one in your browser, with drag-to-reorder and no page limit…

02

Split PDF

Splits a PDF into separate files by page range, every N pages, or one file per page.

03

Rotate PDF Pages

Rotates all pages or selected pages by 90, 180 or 270 degrees and saves the result.

05

Extract Pages from PDF

Pulls selected pages out of a PDF into a new document, keeping the original untouched.

06

Reorder PDF Pages

Rearranges pages into any order you specify, including reversing the whole document.

07

Image to PDF Converter

Turns JPG, PNG and WebP images into a single PDF with page size, orientation and margin control.

08

PDF to Image Converter

Renders each PDF page to a PNG or JPG at your chosen resolution, downloadable individually or…

09

PDF to Text Extractor

Extracts all selectable text from a PDF, preserving reading order and optionally page breaks.

10

Add Page Numbers to PDF

Stamps page numbers onto a PDF at any position, with a custom format and starting number.