About katingmi

katingmi Creator Toolbox is a free collection of online tools that I build and maintain on my own. Every tool here follows the same principle: your files are processed on your own computer or phone and are never uploaded to a server.

Why this site exists

It started with something simple: I wanted a PDF reader that opens right in the browser. But most online PDF tools require you to upload your file to someone else's server first, and I was never comfortable handing over handouts, contracts or documents with personal information. So I built my own — open the page and read, the file never leaves your device, and once it has loaded it keeps working even without an internet connection.

After the PDF reader, I noticed many similar everyday needs: merging or signing PDFs, trimming a video, adding subtitles, removing a photo background, tuning a guitar… Each one usually meant installing software, creating an account, or handing files to an unfamiliar website. So I built these tools one by one, and they became today's katingmi Creator Toolbox.

Principles

• Local processing: PDFs, videos, photos and audio are processed in your browser and never uploaded to my server. The few features that need the internet (such as "AI subtitle editing by prompt" or wireless screen casting) say so clearly before you use them.
• Free, no sign-up: no account needed — open the page and every tool is ready to use.
• Works offline: the site can be installed as an app, and tools you have used before open even without a connection.
• Always improving: bugs are fixed and features added based on user feedback, and every tool keeps getting updates.

Tools available now

• 🎬 Video & Subtitles：Video Editor、Video Converter & Compressor、AI Auto Subtitles、Quick MTS Merge、Media Player、Wireless Cast / Presenter Extension
• 📄 Documents & PDF：PDF Toolbox、PDF Reader、Document Scanner、Online Bible
• 🖼️ Image Tools：Image Editor、Smart Background Remover、AI Object Remover、QR Code & Barcode Generator、Batch Certificate & ID Card Maker、Photo Measure
• 🎵 Music Practice & Presenting：Chord Finder、AI Stem Splitter

To learn more about how data is handled and which features use the internet, please see the Privacy Policy.

Contact

If you have feature suggestions, bug reports, or partnership/advertising inquiries, feel free to reach us at:

Email:contact@katingmi.com

Disclaimer

All tools on this site are provided free of charge. We do our best to keep the service stable and our data handling transparent, but we still recommend backing up important files before processing them here. For details, see our Terms of Service.