Image File Size Checklist for Signature Uploads
Run through this list before you upload. Signature images are simple black-on-white marks, so they can be very small while staying perfectly legible.
Recommended settings for signature uploads
| Setting | Starting point |
|---|---|
| Format | JPEG (WebP where accepted) |
| Width | about 300 px on the long edge |
| Quality | 60 |
| File size | 20 KB or less |
These are practical defaults. If the platform or form you are using publishes its own limits, follow those instead.
Image File Size Checklist
Is it the right format? Photos should be JPEG or WebP. Is it the right width? Around 300 pixels suits signature uploads. Is it under the limit? Aim for 20 KB or whatever the destination specifies.
Is it oriented correctly, cropped cleanly and free of private metadata? Our compressor handles orientation and strips metadata automatically when it re-encodes the image.
Step by step with TheCompressJPEG
- Open the compress JPEG to 20 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 300 and the target size to 20 KB.
- Press Compress, check the result and download it.
Quick tips
- Check the result on a phone, where most people will see it.
- Use consistent dimensions for a set of related images.
- Resize before you compress; it improves quality at any file size.
- Write a size limit slightly below the stated maximum to leave a margin.
FAQ
What JPEG quality should I use for e-learning courses?
Quality around 78 keeps photos looking natural while cutting file size substantially.
Will compressing reduce image quality for e-learning courses?
Some detail is removed, but at sensible settings the difference is not visible at normal viewing size.
How do I compress many images for e-learning courses at once?
Drop all of them into the tool together and use Download all to get a single ZIP.
Wrapping up
For signature uploads, the reliable recipe is simple: resize to around 300 pixels, compress at quality 60 or to a 20 KB target, and check the result before you upload. Keep the original so you can always start again.
Related guides
- How to Get a JPEG Under 20 KB for Signature Uploads
Hitting an exact size limit is easier with a target-size compressor.
- Does Compression Affect Image Quality for Signature Uploads?
Yes, but how much depends on your settings.
- Fixing Blurry Images After Compressing for Signature Uploads
Blurriness after compression usually comes from resizing too far, not from JPEG itself.
- Should You Strip EXIF Data From Images for Signature Uploads?
Photos carry hidden metadata such as camera model, date and sometimes GPS location.
- How to Get a JPEG Under 500 KB for Slack Messages
Hitting an exact size limit is easier with a target-size compressor.
- Fixing Blurry Images After Compressing for Cloud Backups
Blurriness after compression usually comes from resizing too far, not from JPEG itself.