About toolkit

toolkit is a collection of file and text utilities that run entirely inside your browser: image conversion (HEIC, camera RAW, WebP, AVIF, PNG, TIFF and more), video container conversion and compression, ZIP archive cleanup, Base64 and quoted-printable encoding, text encoding conversion, and code formatting for HTML, XML, JSON, JS/TS and YAML.

It is built and maintained by Gyrus Solutions, a small independent studio. We made it because the ordinary way to convert a file on the web is to upload it to a stranger's server, and that is a bad trade for a photo, a scanned document, or anything else you would not post publicly. Changing a file's format should not require handing the file to someone.

Every conversion here runs on your own device. The decoders and encoders are WebAssembly modules your browser fetches and runs locally; there is no upload endpoint in this site's code for file contents to reach, because none was ever written. A Content Security Policy served with every page restricts where the site is permitted to send anything at all — which is what turns “nothing is uploaded” into something you can check in your browser's network tab rather than a promise you have to take on trust.

That design has real costs, and we would rather name them than hide them. Your device's CPU does the work, so a large video takes real time and a very large file needs the memory to hold it. Some conversions a server could do are simply not possible in a browser. And a container conversion changes the container, not the codec: an HEVC video from an iPhone becomes an MP4 that still will not play on a machine with no HEVC decoder, so the tool tells you that instead of reporting a success you would discover was useless later.

There is no account, no install, and no record of what you convert — the file contents never reach the server, so there is nothing on our side to keep. The Privacy page covers what the site itself does collect.

The site is available in English and Ukrainian. Questions, bug reports and feature requests are welcome at info@gyrussolutions.com.