助力日常工作的高精度数字工具。

Yes, completely free. We do not require accounts, logins, or credit cards, and there are no artificial daily limits. Our platform is supported through unobtrusive ads, allowing us to provide premium-grade utilities to everyone worldwide.

Your files never leave your computer or smartphone. All image resizing, image compression, background removal, PDF watermarking, password encryption, and conversion calculations execute strictly inside your local browser memory sandbox. Zero file data is uploaded to remote servers.

Yes! Our HEIC to JPG tool decodes Apple High Efficiency Image Container (.heic and .heif) files directly in your web browser using WebAssembly. You can convert single photos or batch process multiple images at once with a convenient one-click ZIP download.

Use our Protect PDF tool to apply robust AES-256 or RC4-128 encryption with a custom password, or use our Add Watermark to PDF tool to stamp custom text (like Confidential, Draft, or Copyright) across all pages with full control over rotation, opacity, and positioning.

No. The QR Code Generator creates static, permanent QR codes where the link, Wi-Fi credentials, or text are encoded directly into the pixel pattern. They never expire, contain no tracking redirects, and can be downloaded in high-res PNG or vector SVG.

Yes. Every tool is fully responsive and optimized for touchscreens on iPhones, iPads, Android phones, and tablets. You do not need to install any apps or software from app stores.