About
MultiKit is a growing collection of developer and everyday utilities that run entirely in your browser. No accounts, no uploads, no tracking of what you paste in.
What MultiKit is
MultiKit gathers the small utilities people reach for all day and gives each its own fast, clutter-free page. Each tool does one thing and loads instantly, with no setup and no sign-in.
The collection spans more than forty tools across eight categories and keeps growing. Every new tool follows the same principle as the first: do the work in the browser and nowhere else.
What you’ll find
On the encoding and data side there is Base64, URL, and string escaping, plus JSON formatting, a regex tester, and timestamp and UTM helpers. For working with text there is case conversion, find and replace, diffing, sorting, and word counts.
The image tools resize, compress, convert, crop, and build icons and sprite sheets, while the document tools merge, split, and assemble PDFs. Rounding it out are hash and JWT inspectors, a password and UUID generator, and calculators for percentages, loans, compound interest, and subnets.
How it works
Every tool runs 100% client-side. When you encode a string or decode a file, the computation happens in your browser using native web APIs. The data you enter is never sent to a server, because there is no server to send it to.
MultiKit is a static site: just HTML, CSS, and a little JavaScript delivered from a CDN. That is what keeps it fast and what makes "nothing leaves your browser" a structural guarantee rather than a promise.
Who makes it
MultiKit is built and maintained as an independent project. If you have a tool you wish existed, a bug to report, or feedback of any kind, we would like to hear it. See the Contact page.