You choose
The browser reads only the files you select. Nothing starts in the background.
The shortest possible trip.
Your file moves from your folder into your browser and back into your downloads. No processing server sits in the middle.
Your device works
JavaScript, browser codecs, and focused Web Workers perform the task locally.
You download
The finished Blob becomes a download, then temporary browser memory is released.
Local first, with honest limits.
Browser processing depends on your device’s available memory and format support. Filemazing checks reasonable limits, loads heavy engines only when needed, and tells you when a job is better suited to a desktop.