Free · No signup required

Convert any file
in seconds

Images, documents, audio — pick your format and go. Private, instant, free.

Why TwentyOneTools

Everything a converter should be

100% Private

Your files never leave your device. All processing happens locally in your browser using WebAssembly — zero server uploads.

Lightning Fast

Conversions finish in under a second. No queues, no waiting, no refresh. Just instant results every single time.

Maximum Quality

Output preserves as much quality as the format allows. No unnecessary compression, no data loss — perfect fidelity from original to converted.

Batch Convert

Drop up to 50 files at once. Convert an entire folder in one click — all downloaded as a neat ZIP.

Works Everywhere

Desktop, tablet, phone. No app to install. If you have a browser you have TwentyOneTools — any OS, any device.

Process

Upload your File

Drag and drop or click to browse. Single file or batch — up to 50 files at once, up to 25 MB each.

Instant Conversion

TwentyOneTools converts your file entirely in your browser — no uploads, no waiting. Done in under a second.

Download Your File

Your converted file downloads automatically. Batch converts arrive as a single ZIP — clean, organised, ready to use.