About Aback Video

What it is

Aback Video is a set of free video tools that run entirely in your browser. Trim, compress, convert, merge, resize, subtitle, record and inspect video without installing anything and without uploading your files.

How it works

Each tool page loads FFmpeg, the open-source media engine, compiled to WebAssembly and running in a background worker. Your file is read straight from your disk, processed in memory, and saved back with a download. Where the browser can do the job itself, such as grabbing frames or recording the screen, we use the browser's own hardware-accelerated decoders instead.

FFmpeg is licensed under the LGPL/GPL by its authors; the WebAssembly build comes from the ffmpeg.wasm project. Fonts used for burned-in text are Geist (OFL) and Noto Sans (OFL).

Who makes it

Aback Video is part of Aback Group, alongside Aback Tools, Aback Audio, Aback Images and Aback Transcript. Feedback and requests: hello@aback.group.