Working with a 100 KB limit
Start with the limit already set
Choose a still JPG, PNG, WebP or DNG image, leave the maximum at 100 KB, and select Resize & compress. The result includes the actual byte count, dimensions and format.
If it cannot fit
A detailed image may not fit at its current dimensions within the available quality settings. If the upload form does not require exact dimensions, allow smaller dimensions. Otherwise, keep the required dimensions and try another format accepted by the form.
Using this limit for a batch
Each image is checked separately against 100,000 bytes. A ZIP containing several successful images will normally be larger than 100 KB, so use individual files if the receiving form expects separate uploads.
KB and KiB are different
Here, 100 KB means 100,000 bytes. Some services use 100 KiB (102,400 bytes). A file below our 100 KB limit is also below 100 KiB, but the receiving service may have other requirements.