Compress any image to 170KB or less automatically. For web images, email graphics and portals with a 170KB file size limit.
Drop your JPEG or PNG. At 170KB, images up to 1200×800 pixels compress with very good quality.
Binary search finds the highest JPEG quality at or under 170KB. Most web and email photos look excellent at this size.
Review and download your 170KB image.
Yes — 170KB is a reasonable size for individual email images. Email marketing best practices recommend keeping total email image payload under 1MB; at 170KB per image, you can include five to six images while staying within that budget. Smaller images (under 100KB) load faster on mobile, but 170KB is acceptable for hero images in well-designed email templates.
No — pixel dimensions are always preserved. Only JPEG quality is reduced to achieve the 170KB target. If your system requires both a specific file size and specific pixel dimensions, resize your image first and then compress here.
A 800×600 pixel image at 170KB achieves approximately JPEG quality 80–88 — very good for web and email use. A 1200×800 pixel blog hero image at 170KB achieves quality 70–78. Both are solid quality results for digital delivery.
The 170KB limit appears on some real estate listing platforms, professional membership systems, event registration portals, and CMS platforms that set non-standard limits between 100KB and 200KB. It is typically used when system administrators want to allow higher quality than 100KB permits while staying under a 200KB storage threshold.
A single 170KB image loads in under 0.5 seconds on a 3Mbps mobile connection. For pages with multiple images, the cumulative payload matters more than any single image. Google PageSpeed Insights flags images that could be served at smaller sizes — for images displayed at under 600px, 170KB is on the larger side; for full-width hero images, it is reasonable.
