Three clear steps
How it works
- 1
Choose the original image—the file remains on your device.
- 2
Workbox tries to keep its dimensions and finds the highest safe quality within 50KB.
- 3
Download is enabled only after the finished file is checked against the size limit.
Why compress an image to 50KB?
Online applications, recruitment portals, registration systems, government forms, and profile-photo uploaders can impose very small file limits. The exact rule varies by website, so use the limit shown on the form you are submitting.
A 50KB cap applies to the real encoded file, not how small the preview looks. Workbox measures the final result before calling it ready.
How Workbox keeps image quality
Workbox first tries to preserve the original dimensions. It selects the highest safe image quality that satisfies the limit and reduces dimensions only when that is necessary. The final file is then reopened and validated before download.
Is 50KB enough for a photo?
It can be enough for many online submissions, but the result depends on the original dimensions, image detail, required format, and any minimum-dimension rule. Workbox will warn you instead of continuing when the target would require unacceptably low quality.
Private browser processing
Your source image is processed on your device and does not need to be uploaded to a Workbox server. Optional product analytics use broad technical categories and do not include the image, filename, requirement text, or photo metadata.
Tips for a reliable upload
- Use JPG for photographs unless the form explicitly asks for another format.
- Start with the original file to avoid compounding quality loss from earlier compression.
- Include minimum pixel dimensions when the destination form lists them.
Frequently asked questions
Will the result be exactly 50KB?
It will be 50KB or smaller. Workbox aims for the highest safe quality that satisfies the maximum rather than padding a file to an exact byte count.
Does Workbox always reduce the image dimensions?
No. It first tries to meet 50KB at the existing dimensions and reduces them only when necessary.
What happens if 50KB would make the photo look unsafe?
Workbox stops and shows a quality warning instead of producing a file below its safe visual-quality threshold.