Your files stay on your device

Browser tools

What this browser is, and what it can really do, read live from your own tab with every limitation stated. Nothing uploaded.

6 tools

- Browser report

Every identity field your browser volunteers, read live in this tab, caveats included.
 (/browser/ua-report)
- UA parser

Paste any user-agent string, see the browser, engine, OS, and device it claims.
 (/browser/ua-parser)
- Capability dashboard

Which APIs this browser has: presence measured, permissions only queried, never asked.
 (/browser/capabilities)
- Feature support

A dated web-platform snapshot checked live, so you see where this browser agrees, leads, or lags.
 (/browser/feature-support)
- Screen & viewport

Screen, DPR, layout and visual viewports, orientation, preferences. Live values, fingerprinting labeled.
 (/browser/screen)
- Deep probes

Fonts, codecs, WebGL/WebGPU, storage, permissions: the five probes that need real work.
 (/browser/probes)

Your files are processed on your device. The few tools that talk to the internet say so before they do.

Canonical HTML: https://nutter.tools/browser/
Markdown version: https://nutter.tools/browser/index.md
Plain-text version: https://nutter.tools/browser/index.txt
Agent index: https://nutter.tools/llms.txt