System tools

See everything your browser reveals about your system: browser and OS version, CPU, GPU, memory, screen, network, time zone, storage, media formats, permissions, and supported web APIs.

Edit your hosts file in a form. Add, remove, and switch entries on or off, get warnings for invalid addresses, wildcards, and duplicate hostnames, and download the result or restore the Windows, macOS, or Linux default.

Convert chmod modes between octal and symbolic notation: 755 to u=rwx,g=rx,o=rx and back. Also applies changes like u+x or go-w to a current mode, handles setuid, setgid, and the sticky bit, and reads ls -l strings. Runs in your browser.

Test the stereo balance of your headphones or earbuds. Check that left and right are the right way round, find where the sound is centered to see which side is quieter, and follow a sweep from ear to ear, with test sounds or your own audio file. Runs in your browser.

See the image on your clipboard, such as a screenshot or a picture you copied. Paste it to view it with zoom, check its type, size in pixels, and file size, and save it as a file. Runs in your browser.

Generate sample ZIP archives with any number of files, folders and file sizes for testing uploads and extractors.

Generate a dummy file of an exact size with any name and extension, filled with zeros, random bytes or repeated text.

Generate a native bash or zsh command that sends a Wake on LAN magic packet from Linux. Uses Python 3, Perl or bash /dev/udp, so you do not need to install wakeonlan or etherwake.

Test your Xbox Series X|S controller in your browser. Press the buttons to see them light up, check the sticks for drift, see how far the triggers pull and try the vibration.

Test your Xbox One or Xbox One S controller in your browser. Press the buttons to see them light up, check the sticks for drift, see how far the triggers pull and try the vibration.

Test your Xbox Elite Series 2 or Elite controller in your browser. Press the buttons and back paddles to see them light up, check the sticks for drift and see how far the triggers pull. Chrome and Edge on Windows show the paddles as P1 to P4.

Test your wired or wireless Xbox 360 controller in your browser. Press the buttons to see them light up, check the sticks for drift, see how far the triggers pull and try the vibration.

Test your PS5 DualSense controller in your browser. Press the buttons and the touchpad to see them light up, check the sticks for drift, see how far L2 and R2 pull and try the vibration.

Test your PS5 DualSense Edge controller in your browser. Press the buttons and the touchpad to see them light up, check the sticks for drift and see how far L2 and R2 pull. Back buttons show up as the buttons you assigned to them.

Test your PS4 DualShock 4 controller in your browser. Press the buttons and the touchpad to see them light up, check the sticks for drift, see how far L2 and R2 pull and try the vibration.

Test your PS3 DualShock 3 or Sixaxis controller in your browser. Press the buttons to see them light up, check the sticks for drift and see how far L2 and R2 pull.

Test your Nintendo Switch Pro Controller in your browser. Press the buttons to see them light up, check the sticks for drift, try ZL, ZR and Capture, and feel the vibration.

Test your Nintendo Switch Joy-Con controllers in your browser and check the sticks for Joy-Con drift. Press the buttons to see them light up, including SL and SR, and try the vibration.

Test your 8BitDo Pro 2, Ultimate, SN30 Pro or other 8BitDo controller in your browser. Press the buttons to see them light up, check the sticks for drift and see how far the triggers pull.

Test your Logitech F310, F510 or F710 gamepad in your browser. Press the buttons to see them light up, check the sticks for drift and see the value of every button and axis.

Test your Google Stadia Controller over USB or in Bluetooth mode in your browser. Press the buttons to see them light up, check the sticks for drift, see how far L2 and R2 pull and try the vibration.

Test your GameSir G7, Nova, Cyclone, T4 or other GameSir controller in your browser. Press the buttons to see them light up, check the sticks for drift, see how far the triggers pull and try the vibration.

Test your Flydigi Vader, Apex or Direwolf controller in your browser. Press the buttons to see them light up, check the sticks for drift, see how far the triggers pull and try the vibration.

Test your Razer Wolverine V3, V2 or other Wolverine controller in your browser. Press the buttons to see them light up, check the sticks for drift, see how far the triggers pull and try the vibration.