About
A collection of small, fast conversion tools that respect your data.
FileMancer exists because converting a file should not require creating an account, watching an advertisement, waiting in an upload queue, or handing a spreadsheet full of customer records to a stranger.
There are 61 converters here today, covering data formats, developer utilities, text encodings, images and documents. All of them are free, and all of them work the same way.
How it works
Every converter on this site runs entirely inside your browser tab. When you paste JSON and press Convert, the parsing and the CSV generation happen on your own device in JavaScript. When you drop in a PNG, your browser decodes it, redraws it on a canvas and re-encodes it as a JPEG.
Nothing is transmitted. There is no upload endpoint, no processing queue and no temporary storage bucket, because there is no server involved in the conversion at all.
This is also why the tools feel instant: the round trip that normally dominates the wait simply is not there.
What that means in practice
The benefits are real, and so are the limits. Being honest about both is more useful than marketing copy.
- Your data never leaves your device, so there is nothing for us to leak, log, retain or hand over.
- Conversions work without a network connection once the page has loaded.
- File size limits come from your device’s memory, not from a plan tier.
- Some conversions are genuinely impossible in a browser today. Where that is the case, the tool is not listed rather than shipped as a stub.
What is not here
You will not find PDF-to-Word, video transcoding or OCR on this site yet. Those need either a very large library or real server-side processing, and adding a converter that quietly uploads your file would undermine the reason the rest of them exist.
They are on the roadmap, and if they arrive with a server behind them, the page will say so plainly before you upload anything.
Built with
Angular with server-side rendering, plain CSS, and the standard web platform APIs — Canvas, Web Crypto, TextEncoder, File and Blob. Deliberately few dependencies, which keeps pages small and fast.