Three clear steps
How it works
- 1
Choose your image—the file remains in your browser.
- 2
Workbox adjusts encoding quality and, only when necessary, image dimensions.
- 3
The final file is reopened and its actual byte size is checked against 100KB.
Why some forms require images under 100KB
Older recruitment, visa, education, and government systems often enforce small upload limits to reduce storage and keep slow connections usable.
The limit applies to the real file size, not the dimensions shown on screen. Workbox validates bytes after processing so the result is not based on an estimate.
Tips for a reliable upload
- Use JPG for photographs unless the form specifically requires PNG.
- Start with the original image instead of repeatedly compressing an already compressed copy.
- If 100KB is impossible at required dimensions, use the larger limit offered by the destination form.
Frequently asked questions
Will the image be exactly 100KB?
It will be 100KB or smaller. Workbox prioritizes the highest usable quality that still satisfies the maximum.
Does compressing to 100KB reduce dimensions?
Workbox first tries to keep the current dimensions. It reduces them only if encoding quality alone cannot meet the limit.
Is my image uploaded?
No. Image processing and validation happen locally in your browser.