Free · No Account · No Upload

Offline File Converter

Private by Design.

Convert files entirely in your browser. Nothing is uploaded. Ever. Your files stay on your machine — powered by WebAssembly running fully in the browser.

Try at offlinefileconverter.com Free forever · No signup needed
81+ converters. All local.
Images
Convert between JPG, PNG, WebP, GIF, BMP, TIFF, and more. Resize, crop, and optimize — all locally.
PDFs
Merge, split, compress, and convert PDFs. No cloud service, no file size limit from upload restrictions.
Video
Trim, convert, and process video files using FFmpeg compiled to WebAssembly. No server, no wait times.
Developer Tools
Format JSON, minify CSS and JS, Base64 encode/decode, and more utility tools for developers.
Works Offline
After initial load, the tool works without internet. Take it anywhere, use it anytime — no connectivity needed.
Zero Tracking
No account, no analytics on file contents, no data collection. Your files are entirely private — they never leave your device.

Your files never leave your device.

Every conversion happens in your browser using WebAssembly. There is no server. Nothing is uploaded. This is what "private by design" actually means.