在线免费图片压缩工具

Switch to Lossless mode before compressing. Lossless compression removes redundant data without discarding any image information, so the output is visually identical to the original. File size reduction is smaller than Lossy but image quality is fully preserved.

The compressor runs entirely in your browser, so the practical limit depends on your device's available memory. Most modern devices handle images up to 20–30 MB without issue. Very large RAW or high-resolution files may cause the browser to slow down.

Lossy compression permanently removes some image data to achieve smaller file sizes — ideal for web and social media where a small quality trade-off is acceptable. Lossless keeps all data intact; the file is smaller only because redundant patterns are encoded more efficiently.

No. All compression happens directly in your browser using the Canvas API. Your image never leaves your device and nothing is stored or transmitted anywhere.

Set mode to Lossy, drag the quality slider to around 60–70%, and watch the output size in the result panel. Adjust the slider until the displayed file size drops below 100 KB, then click Download.

Yes, the 图片压缩工具 on Allio Tools is completely free with no sign-up or registration required. It works directly in your browser.

无损压缩图片，适合网页使用。 No data is sent to a server — everything runs locally in your browser for maximum privacy and speed.

No installation needed. The 图片压缩工具 runs entirely in your web browser on any device — desktop, tablet, or mobile.

Completely safe. The 图片压缩工具 processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.

After the page loads for the first time, the 图片压缩工具 works without an internet connection for all client-side processing. Tools that fetch live external data (such as DNS or network lookups) require an active connection.

The 图片压缩工具 works with common image formats supported by your browser, including JPEG, PNG, WebP, and GIF. SVG support varies by tool. No format conversion plugin or driver is needed.

Yes. The 图片压缩工具 processes files entirely in your browser using the Canvas API. Very large files (over 20 MB) may take a few extra seconds on older or lower-powered devices. Closing other tabs can free up memory for better performance.

Yes. The 图片压缩工具 is built with standard browser APIs and works on all modern browsers including Chrome, Firefox, Safari, and Edge — on both desktop and mobile. No plugins, extensions, or third-party software are required.

Select and copy the result text to paste into any document or app. For image tools, a Download button saves the file directly to your device. Your browser's built-in screenshot function also captures results quickly. No account or login is required.