Drag the Quality slider (default 75%); the tool shows the compressed size and ratio in real time. At quality 80–85, WebP usually looks identical to the original while cutting size by 60%–90% — exactly the best practice for compressing images without losing quality.
Enable Target size, enter the target KB (e.g. 200), and the tool auto-adjusts quality via binary search to fit under that size — perfect for application photos or WeChat / email attachment limits, i.e. compress image to 200kb.
Just drag in several images, or paste a screenshot with Ctrl+V. All images enter a queue and compress in parallel; when done you can download each one or export everything as a ZIP.
No. All compression happens locally on your device and works offline; images never leave the browser and there are no upload requests — the core selling point of a private image compressor / image compressor no upload.
Yes — JPG / PNG can be converted to WebP. AVIF export falls back to WebP automatically with an on-page notice because of browser encoding limits. For extreme-size needs (AVIF converter / AVIF compression), use a browser that supports AVIF encoding.
No. This is a fully client-side tool (image compressor no watermark) — no watermarks, no usage limits, no sign-up. That's exactly why people search for photo compressor no watermark / 图片压缩 无水印.
Yes. Whether it's an application photo, WeChat avatar, email attachment or web image, use Target size to fit limits (e.g. 200KB / 100KB) or switch to WebP for big savings — covering compress photo for email / reduce image size for website / photo compressor use cases.
Yes. Smaller images speed up pages and improve Core Web Vitals (LCP), helping image compression SEO / optimize images for web. Because everything runs locally, your originals are never uploaded — performance and privacy together.