All tools

How to Reduce PDF Size to Under 1 MB, 500 KB or 200 KB (Free)

2 min read

The quick answer: open the Compress PDF tool, drop in your file, choose Smallest file, and download the result. It takes under a minute and your file is never uploaded, because everything runs in your browser. If the file is still too big, the other methods below will get it down.

Why is my PDF so big?

Almost always, it is the images. A text-only PDF is usually a few hundred KB. A scanned document, where every page is a photo of paper, can easily reach tens of MB. Compression works by shrinking those page images, not the text.

Method 1: Compress the whole file (fastest)

  1. Open Compress PDF.
  2. Drop in your PDF or choose it from your device.
  3. Pick a level: Smallest file for the biggest cut, Balanced for a middle option, or Sharpest if quality matters most.
  4. Select Compress PDF and compare the before and after size.
  5. Download the new file.

Scans of paper usually shrink a lot. A file that is already mostly text may barely change, and the tool will tell you if the result is not smaller.

Method 2: Remove pages you do not need

Cover sheets, blank pages and duplicates add up. Use Delete PDF Pages to remove them, then compress the result.

Method 3: Send only the pages that matter

If the portal only needs a few pages, use Split PDF to extract just those. Fewer pages means a smaller file.

Method 4: Split one big file into parts

If the limit applies per file but you can attach several, use Split PDF to cut the document into two or three parts, each under the limit.

Method 5: Fix the source

If you are making the PDF from photos, shrink the photos first, then use JPG to PDF. If you are scanning, choose a lower scan resolution. 150 DPI is plenty for reading on screen.

Size limits to aim for

Where it is going Typical limit
Gmail attachment About 25 MB
Outlook.com attachment About 20 MB
Job, visa and exam portals Often 1 to 5 MB, sometimes less. Check the form.

Providers change their limits, so check the one you are using.

What compression changes

Compressed pages are saved as images, so text in the compressed copy cannot be selected or searched. Always keep your original. If you need selectable text, use methods 2 to 4 instead.

Still too big? Try this

  • The result is larger than the original. The file is already well optimised. Use method 2 or 3.
  • It says the PDF is password-protected. Remove the password first, then try again.
  • Text looks blurry. Run it again with Sharpest, starting from your original file, not the compressed copy.

Frequently asked questions

Is it safe to compress a PDF online?

With this tool, yes. Files are processed inside your browser and are not uploaded to our servers.

Can I reduce a PDF to an exact size like 200 KB?

The levels get you close, but the result depends on what is inside the file. If you are slightly over the limit, combine compression with method 2 or 3.

Will compression lower print quality?

It can. For printing, keep the original and compress a copy for email.

Does it work on a phone?

Yes, it runs in any modern mobile browser.

Need something else? Try Merge PDF, Rotate PDF or PDF to JPG.