Articles
Plain-language explainers on private, local file handling: why it matters, how it works, and what to watch out for.
- Why process files locally? Every time you use an online file tool, you are trusting a stranger’s server with your data. There is another way: let your own browser do the work.
- Privacy risks of online file tools Free online file tools are convenient, but uploading a file hands it to a server you do not control. Here is what that means in practice, and how to protect yourself.
- What is client-side processing? Most file tools work by sending your document to a remote computer, which does the heavy lifting and sends a result back. Client-side processing flips that: your own browser does the work, and your file never leaves your device.
- Convert and clean up audio in your browser Audio editing used to mean desktop software, large downloads and sending files to conversion services. Every task described here now runs entirely in your browser using FFmpeg compiled to WebAssembly. Your files never leave your device, the tools work offline after the first load, and there is no account to create.
- Choosing the right image format JPEG, PNG, WebP, HEIC, AVIF: picking an image format sounds technical, but the decision comes down to three questions: what is in the image, where is it going, and does it need a transparent background? This article cuts through the noise and gives you a clear answer for the most common cases.
- Sending a file that is too big You try to attach a file to an email, drop it into a chat, or share it on a messaging app. A red error message tells you the file is too large. Here is what that limit actually means, where it comes from, and how to get under it without sending your file to a third-party server.
- Prepare your documents for online administrative procedures Submitting documents for a rental application, a tax declaration or a visa request used to mean photocopies and a trip to an office. Today most of that happens online, which is faster but comes with a real risk: your ID card, your bank statement and your payslips end up on servers you do not control. This article covers the formats portals expect, how to protect your documents before sharing them and how to do all of it without uploading your files anywhere.
- Optimize website media for speed and Core Web Vitals Images and videos typically account for 60 to 80 percent of a web page's total weight. Getting them right is the single highest-leverage thing you can do for loading speed, Core Web Vitals scores and search ranking. The good news: none of it requires specialized software or a server, and your files never need to leave your device.
- QR codes for a business or venue: the why and what A QR code is a machine-readable square that can point to anything: a website, a Wi-Fi credential, a phone number, or a contact card. For a physical business, that means turning a printed surface into an active link without forcing customers to type a URL or a password.