About KitDevs

KitDevs is a suite of browser-based file tools designed around one principle: your files are yours. Nothing is uploaded. Nothing is stored. Everything happens on your device.

Why we built KitDevs

Most online file tools work by uploading your files to a server, processing them, and returning a download link. That approach works - but it comes with tradeoffs you often don't think about: your files pass through someone else's infrastructure, wait in a queue, and may be stored or logged in ways you can't audit.

Modern browsers are capable of far more than people realize. With WebAssembly, OffscreenCanvas, and the File API, a browser tab can now run FFmpeg, decode and re-encode images, and process PDFs - all without any network requests. KitDevs is built entirely on these technologies.

The result is a tool that's not just private - it's also faster than server-based tools for most tasks, because there's no upload time, no queue, and no download latency.

Privacy as a design requirement

Privacy in KitDevs isn't a marketing claim - it's a structural property of how the software works. When you compress an image or convert a video, the bytes of that file never leave your browser tab. There is no server to subpoena, no log to leak, no breach to worry about.

This makes KitDevs suitable for files you wouldn't want to upload anywhere: confidential contracts, personal photos, medical records, internal business documents. The tool genuinely cannot see them.

You can verify this yourself. Open DevTools -> Network tab, then compress or convert a file. You'll see no requests containing your file data. The only network requests are loading the page itself and locally hosted browser libraries on first use.

Technology we use

KitDevs is built as a static HTML, CSS, and JavaScript app. Every tool runs in a single browser context with processing libraries hosted locally alongside the site files:

FFmpeg.wasm - The full FFmpeg toolchain compiled to WebAssembly for video and audio processing.
pdf-lib - A pure JavaScript library for reading and writing PDF files.
Canvas API / OffscreenCanvas - Native browser APIs for image decoding, re-encoding, and resizing.
JSZip - In-browser ZIP file creation for batch download support.

Our mission

We want to make file processing accessible to everyone without requiring accounts, subscriptions, or trust in third-party servers. The web platform can handle these tasks - KitDevs makes that capability easier to use.

We plan to keep expanding the toolkit. Background removal, video trimming, image format conversion, and PDF merging are all on the roadmap - all built on the same privacy-first architecture.

Try a tool

No account, no upload, no waiting. Just open and use.

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