上传一张图片，立即检测它的“退化分数”，并一键导出为无损格式，阻止质量继续下降。
Every time you save a JPEG, it gets recompressed — losing detail, introducing blocky artifacts, and muddying colors. A recent Hacker News post (646 upvotes, 65 comments) showed how a simple image becomes unrecognizable after just a few saves. This isn't a niche problem: designers, developers, and everyday users all hit this wall when they re-edit a photo or download a file from social media.
Existing tools either ignore the issue (compression services like TinyPNG focus on file size, not quality) or overcomplicate it (Photoshop is overkill for a single image). AI enhancers promise to "fix" blur but often change the image's character — and they're slow. What's missing is a straightforward tool that tells you how degraded your JPEG is and gives you a clean, lossless copy to stop the rot.
The timing is perfect: as more people share images across platforms, the "save → upload → re-save" cycle accelerates. Awareness is spiking — the HN thread, Reddit discussions in r/photography and r/webdev, and tweets about "JPEG decay" are all signals that the market is ready for a dead-simple solution. No sign-up, no AI hype, just a clear diagnosis and a one-click fix.
Drag and drop or click to select any JPEG from your computer. The image stays in your browser — nothing is uploaded to a server, so your privacy is guaranteed.
Our algorithm analyzes compression artifacts, blockiness, and save history to give you a clear 1–10 score. You'll see exactly how many generations of re-saving have damaged your image.
One click and you download a pristine, lossless copy. No more quality loss — your image is frozen in its best possible state, ready to share, edit, or archive.
See exactly how many times your JPEG has been re-saved and where the quality loss is worst. Our score gives you a clear, honest picture of your image's health — no guesswork.
Stop the rot instantly. Export your image as PNG or WebP — both lossless formats — so you never lose another pixel. No sign-up, no payment, just a clean download.
All processing happens in your browser using Canvas API. Your image never touches a server — perfect for sensitive designs or personal photos. Free, fast, and secure.