Offkit

37 file tools that run on your device. Use them here in your browser, or download the desktop app for Windows, macOS and Linux. Your files are never uploaded.

Download the desktop app Read the docs

Windows 10 or later (64-bit), macOS 11 or later, or 64-bit Linux.

Tools

Audio

Tools

Convert Extract Edit Join

Video

Tools

Convert Frames Edit Merge

Dev

Tools

Scaffold Extract Archive

Images

Tools

Crop Convert

SVG

Tools

Animate Pattern Optimize

Colors

Tools

Gradients Library Library Extract Convert Convert

CSS

Tools

Blob Glass Shadow

PDF

Tools

Toolkit Convert Merge Split Compress To PDF From PDF

Text

Tools

Lorem Diff Format Base64 Markdown

How it stays local

No uploads: Your files are read and written on your own device by engines that run there, in the browser and in the app alike: FFmpeg, ImageMagick and pdf.js.
No file traffic: No tool sends your files anywhere. The one tool that goes online is Directory Scaffold, which asks GitHub for a repository's file list when you use it. The desktop app makes no network requests of its own.
No account: There is nothing to sign in to. This website counts page views and reports script errors, and never sees your files. The desktop app collects nothing.