From the moment you drop a file to the moment the result lands in your downloads — here's exactly what happens, and what never happens.
Pick any of the 14 tools, then drag files onto the dropzone — or click to browse. Your browser reads the file straight from disk into memory using the File API. No upload request is ever made.
Every tool exposes the settings that matter — page size, orientation and margins for PDFs; format and quality for images; ranges for splitting. Nothing is processed yet: settings are simply remembered until you hit convert.
The engine runs entirely on your device — Canvas for pixels, pdf-lib for document surgery, WebAssembly for AI. A progress bar tracks the job, and the finished file is handed straight to your downloads folder.
Your device does the work a server used to do.
Reads files you select directly from disk into browser memory — the replacement for uploading.
Pixel-level image work: resizing, compression, and format conversion (JPEG / PNG / WebP).
Surgical PDF manipulation: merging, splitting, page copying — and building brand-new PDFs from images or text.
Runs the AI background-removal model at near-native speed on your own CPU — privately.
Different engines, same privacy guarantee.
pdf-lib parses the PDF structure and copies page objects into a new document — your original content is never re-rendered, so quality stays pixel-perfect.
Images are drawn onto a Canvas at your chosen dimensions, then re-encoded in your chosen format and quality. WebP output typically saves 60–90%.
A ~40 MB neural network downloads once, caches in IndexedDB, and runs inference via WebAssembly. After first use it works even offline.
JSON formatting, Base64, color math, word stats and password generation are pure JavaScript — instant, with zero dependencies.
ConverterTools is an installable Progressive Web App. A service worker caches the app shell, every tool page, and the conversion libraries on your first visit.
After that, pages load instantly from cache — and if your connection drops mid-task, tools you've already used keep working. The AI model for background removal is cached separately in IndexedDB.
Install it from the install button that appears in the corner, or from your browser menu, and it launches in its own window like a native app.
The best way to understand it is to drop a file in. It takes ten seconds.