How to Compress Images for PDF Documents on Windows
On Windows, a browser-based compressor avoids installing extra software. Images are usually the reason a PDF becomes too large to email, so compressing them before inserting keeps the PDF small.
Recommended settings for PDF documents
| Setting | Starting point |
|---|---|
| Format | JPEG (WebP where accepted) |
| Width | about 1600 px on the long edge |
| Quality | 78 |
| File size | 200 KB or less |
These are practical defaults. If the platform or form you are using publishes its own limits, follow those instead.
How to Compress Images
Open Edge, Chrome or Firefox, drag your photos from File Explorer into the drop zone, and set quality around 78.
For several files, use Download all to get a single ZIP. Extract it and your images are ready for PDF documents with the original files untouched.
Step by step with TheCompressJPEG
- Open the compress JPEG to 200 KB tool, or the main compressor for custom settings.
- Drop in your image. Nothing is uploaded; it is processed in your browser.
- Set the maximum width to 1600 and the target size to 200 KB.
- Press Compress, check the result and download it.
Quick tips
- Always keep the original file and compress a copy.
- Use JPEG for photos and PNG for logos and line art.
- Name files descriptively with lowercase words and hyphens.
- Check the result on a phone, where most people will see it.
FAQ
What size should an image be for e-learning courses?
A practical default is about 1600 pixels wide and 200 KB or less, unless the destination states its own limits.
Can I compress images for e-learning courses without uploading them?
Yes. TheCompressJPEG runs entirely in your browser, so your images never leave your device.
Is WebP accepted for e-learning courses?
It depends on the platform. JPEG is the safest choice when you are not sure.
Wrapping up
For PDF documents, the reliable recipe is simple: resize to around 1600 pixels, compress at quality 78 or to a 200 KB target, and check the result before you upload. Keep the original so you can always start again.
Related guides
- How to Compress Images for PDF Documents on Mac
Mac users can compress JPEGs without opening Preview or Photoshop.
- How to Compress Images for PDF Documents Without Losing Quality
Strictly speaking, JPEG compression always discards something, but you can make the loss invisible.
- Batch Compressing Photos for PDF Documents
When you have dozens of images, consistency matters as much as size.
- Why Your Images Are Too Large for PDF Documents
If an upload keeps failing, the image is usually larger than it needs to be in more ways than one.
- How to Compress Images for Profile Pictures on Mac
Mac users can compress JPEGs without opening Preview or Photoshop.
- Batch Compressing Photos for SMS and MMS Messages
When you have dozens of images, consistency matters as much as size.