In this article
You try to send your CV or a project file and get the message: “File exceeds the size limit.” It happens all the time, and the fix isn’t always deleting pages or accepting blurry results. You just need to understand what makes a PDF heavy.
Why do PDF files get so large?
- High-resolution images: the number-one cause. A single phone photo can exceed 4 MB.
- Scanned pages: every scanned page is actually a full image, not text.
- Embedded fonts: some apps embed the whole font instead of only the characters used.
- Hidden data: old revisions, thumbnails and metadata the reader never needs.
Pick a compression level for the job
| Use | Suggested level |
|---|---|
| Email or messaging apps | Medium: good balance of size and clarity |
| Upload portal with a 2 MB limit | Strong, then check readability |
| Professional printing | Light or none |
| Long-term archiving | Light, and keep the original |
Step by step
- Open the Compress PDF tool and drop in your file.
- Start with the medium level and compare the new size with the old one.
- Open the result and zoom in on a page with small text and a picture. If the text is still crisp, you’re done.
- If it’s still too big, choose a stronger level instead of re-compressing the already compressed file.
Tricks to cut size before compressing
- Remove blank or duplicate pages with the Organize PDF tool.
- Only need part of the document? Extract it with Split PDF and send that.
- If the file is made of photos, shrink them first with the Image Compressor, then convert them to PDF.
Common mistakes
Compressing the same file over and over degrades images each time for almost no saving. Converting a PDF to images and back turns text into pictures, so it can no longer be searched or copied. Always keep the original and compress a copy.
Bottom line
Most of a PDF’s weight comes from images. Choose the level according to where the file is going, check the result with your own eyes, and remove what you don’t need first. Because the tool runs in your browser, your private documents stay on your device.
