Privacy-first browser utilities
80+ free tools for files, images, code, calculations and more — all running locally in your browser.
Your tools.
Your browser.
Your privacy.
Powerful utilities, no uploads, no tracking, no limits.
Image to PDF
Convert images to PDF
PDF Merge
Combine multiple PDF files
JSON Beautifier
Format JSON data instantly
Image Compressor
Reduce image size instantly
SIP Calculator
Plan your investments
Video to MP3
Extract audio from videos
Zero Uploads
Offline Ready
Fast & Simple
100% Private
Zero Uploads
Your files never leave your device.
Offline Ready
Works without an internet connection.
Fast & Simple
Get things done, instantly.
100% Private
No tracking, no data collection.
Popular tools
Most used tools on OctalOne
Browse by category
Explore all 106+ tools across 9 categories
Runs in your browser
No installs, no uploads, no tracking.
Stay chill
No files leave your device
Every tool includes drag-and-drop, loading states, and downloads that only appear when results are ready. Files never leave your device; processing happens in the browser.
Offline-first
Tip: load any tool, then turn off your internet — the tools continue to run completely offline.