How to Compress Images for YouTube Thumbnails on Windows
On Windows, a browser-based compressor avoids installing extra software. Thumbnails are shown at many sizes across devices, and a clean, light file keeps text and faces crisp.
Recommended settings for YouTube thumbnails
| Setting | Starting point |
|---|---|
| Format | JPEG (WebP where accepted) |
| Width | about 1280 px on the long edge |
| Quality | 78 |
| File size | 500 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 YouTube thumbnails with the original files untouched.
Step by step with TheCompressJPEG
- Open the compress JPEG to 500 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 1280 and the target size to 500 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
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.
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.
Wrapping up
For YouTube thumbnails, the reliable recipe is simple: resize to around 1280 pixels, compress at quality 78 or to a 500 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 YouTube Thumbnails on Mac
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