To hit an exact file size target like 100KB, the best approach is to combine resizing (reduce dimensions) and compression (reduce quality). Both steps are free.
Open Fourmeld Image Tools
Go to fourmeld.com/image-tools in your browser.
Upload your file
Click Upload and select your image or PDF from your device.
Set target size to 100KB
Enter 100KB as the target file size, or drag the quality slider until the estimated output size is under 100KB.
Download the compressed file
Click Compress and download. The output will be under 100KB.
Tips
- If quality looks too low, increase the target slightly (e.g. 100KB → 150KB)
- Reduce image dimensions first (resize down) — then compress for best results at small sizes
- JPG at 60-70% quality typically hits small size targets with acceptable visual quality
FAQs
What if the image still looks bad at 100KB?
Lower the quality target slightly and try again. For very small targets, some quality loss is inevitable.
Does compression change image dimensions?
No — compression reduces file size without changing pixel dimensions. Use resize to change dimensions.
Can I compress to exactly 100KB?
The tool targets under 100KB. The actual output may be slightly smaller than 100KB.
Compress to 100KB — Free Online
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