Create an upload-ready photo before submitting a registration or account form.
Exact size image compressor
Compress images for online forms
Fix a photo that an online form rejects for being too large. Start at 100KB, or set the exact limit shown by the form.
Compress image to 100KB →Work from the maximum file size shown by the form instead of guessing a quality setting.
Meet pixel dimensions and square-photo requirements before you upload.
How to compress an image to 100KB
First check the form’s maximum file size, accepted format, and required dimensions. Then enter the stated limit, resize or crop only when needed, and download a JPG that is ready to upload. For a strict “under 100KB” rule, leave a little room below the limit.
- Open the TargetKB compressor with the 100KB limit already selected.
- Upload one image or up to 10 images at once.
- Download the optimized image and check its dimensions and file size before uploading.
Read the checklist: reduce image size for online forms
Why use an exact-size compressor?
Many upload forms reject files for being only slightly too large. TargetKB works backwards from your requested limit, automatically balancing image dimensions and JPEG quality instead of asking you to guess a quality percentage.
Check byte limits, output quality and format limitations if your upload is still rejected.
Frequently asked questions
Can I set an exact custom file-size target?
Yes. Enter any target in KB or MB, then TargetKB finds the clearest result below that limit.
What should I check when an online form rejects my image?
Check the maximum file size, width and height, aspect ratio, and accepted file type. Any one of these can cause an upload failure.
Should I use JPG or PNG for an online form?
Use the format the form accepts. JPG is usually the smaller choice for photographs, while PNG may be useful for screenshots or images that need transparency.
Are photos uploaded to TargetKB?
Processing happens locally in your browser whenever your device supports it.