https://qilingtools.com/en/blog The QiLing Tools blog: practical tips and tutorials for PDF, image, audio and video tasks, how each free online tool works, and why your files never need to be uploaded. en Thu, 29 Oct 2026 00:00:00 GMT https://qilingtools.com/en/blog/files-stay-in-your-browser https://qilingtools.com/en/blog/files-stay-in-your-browser Thu, 29 Oct 2026 00:00:00 GMT QiLing Tools' PDF, image, audio and video tools run inside your browser, so files never touch a server. Here is how that works, how to verify it yourself, and its limits. How It Works Privacy Browser WebAssembly https://qilingtools.com/en/blog/pdf-too-large https://qilingtools.com/en/blog/pdf-too-large Thu, 29 Oct 2026 00:00:00 GMT Large PDFs get large for different reasons. Scans shrink best as compressed images, text PDFs need lossless optimization to keep selectable text, and the rest can be split by size. Tutorials PDF Compression Tutorial