How to Compress Any Image Under 100KB
Why 100KB is the Magic Number
Many online application portals, government forms, and academic submission systems enforce strict file size limits, often capping uploads at exactly 100KB. When you take a photo with a modern smartphone, the file is typically between 3MB and 5MB. Trying to shrink a 5MB image down to under 100KB manually can result in unrecognizable pixelation. PhotoDiet uses an advanced lossy compression technique that safely reduces file sizes by up to 95% while keeping the image completely legible.
How to Achieve Maximum Compression
- Step 1: Drag and drop your oversized image into the dropzone above.
- Step 2: Wait less than a second as your browser's WebAssembly engine crunches the pixels.
- Step 3: Review the before-and-after preview to ensure the text or faces in your photo are still clear.
- Step 4: Click download to get your perfectly sized, sub-100KB file.
Frequently Asked Questions
Q: How do you shrink an image so much without ruining it?
A: We use a technique called Chroma Subsampling and intelligent quantization. The human eye is very sensitive to changes in brightness, but much less sensitive to slight shifts in color. By grouping similar colors together, we delete data you can't even see.
Q: Is this safe for passports or ID cards?
A: Yes! Because the compression happens 100% locally on your device, your highly sensitive ID documents are completely safe. They never leave your computer.
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