Convert files on your device.

No. fileclay has no upload step: your browser opens the file, converts it in the tab and saves the result to your device. No copy reaches a server, and closing the tab discards everything, so it’s safe to use with confidential documents.

Yes. There’s no paid plan, no account, no watermark and no daily limit on conversions. Your own device does the work, so converting a thousand files costs the site the same as converting one.

Images, audio, video, documents, spreadsheets and PDF: more than a hundred formats, including HEIC, WebP, MP4, MOV, MP3, WAV, DOCX, EPUB and XLSX. There are also nineteen tools for the PDFs you already have, such as merge, split, compress and sign. The format guide lists each format and what it converts to.

Up to 2 GB per file and 200 files per batch. The real ceiling is your device memory, because that’s where the conversion happens: a computer with 16 GB of RAM reaches the 2 GB, a phone handles less. fileclay checks this before it starts and tells you if a file won’t fit, instead of failing halfway.

Only when the target format is lossy. PNG, WAV and FLAC keep every detail; JPG, WebP, MP3 and MP4 discard some, and you choose how much in the advanced settings, where Auto suits almost everything. When a video only changes container and its codecs fit, as in many MKV to MP4 conversions, it’s copied without re-encoding and nothing is lost.

Yes, in the browser, with nothing to install. Phones have less memory than a computer, so a long video may be more than the phone can convert, and fileclay warns you before it starts. You can also add it to your home screen from the browser menu and open it like an app.

Most online converters upload your file, convert it on their server and send it back: you wait for the upload and a copy of your file sits on a machine you don’t control. In fileclay the conversion runs on your device, so there’s no upload to wait for and no copy anywhere else.