How to Compress JPG Without Losing Quality

Yes — JPG compression is lossy. Each save cycle discards data. The key is compressing once from the original at the right quality setting (75–85%) rather than repeatedly re-saving. Always compress from your original file, not from a previously compressed version.

At quality 90%, the file is nearly indistinguishable from the original but only 20–40% smaller. At quality 80%, the file is typically 50–70% smaller with no visible difference at normal viewing sizes. Quality 70% can show very subtle artifacts on hard edges. For most web use, 80% is the sweet spot.

True lossless compression of JPGs (reducing file size with zero quality loss) is possible using metadata stripping and Huffman table optimization, but the savings are small — typically 5–15%. For meaningful size reduction (40%+), some quality loss is mathematically required by the JPG format.

If the original was already compressed at a similar quality level, re-compressing gives minimal additional savings. Check the original file's metadata — if it shows a quality of 80% already, compressing at 80% again will have little effect. Try 70% or lower to see meaningful reduction.

Convert to WebP. WebP achieves 25–35% better compression than JPG at equivalent visual quality, making it the recommended format for web images. ImgToolkit's Convert tool handles the conversion in your browser.