One tool.
No detours.
Web tools that do one thing and do it fast. Everything runs in your browser: no accounts, nothing to install, nothing uploaded anywhere.
The whole range, in one place
No menus, no folders: you come in, sort out your thing and get on with your day.
Is your gear working?
Test the hardware before you buy it or send it back.
How it works
You search
You type what you need into the search box. No categories to memorise, no nested menus.
You use it
The tool opens ready to work — no sign-up, no intermediate step. Every calculation happens in your browser.
You leave
You close the tab and nothing is left behind. If you want to understand what you just used, every tool has its manual underneath.
Every tool comes with a manual
There is always an explanation under the button: how it works inside, where it came from, how to do it by hand and what to check when the answer looks wrong.
A patent about doughnuts, and a name that stuck to the wrong thing
The engineering is much older than the appliance. Convection ovens were sold to commercial kitchens from the 1960s, on exactly the reasoning above: a fan let a baker run a lower temperature, fit more trays and finish sooner. The domestic version arrived slowly and was mostly bought by people who wanted a second oven.
Read it in Oven to air fryer →DiagnosisOne comb has gaps in it; the others look fine
Run one head cleaning cycle from the printer's own menu or its desktop utility, then print this sheet again. If it improved but is not clear, run one more. If two cleanings do nothing, leave the printer switched on and idle overnight — the ink softens — and try once more in the morning before buying anything.
Read it in Printer test page →TriviaA pinch is a scroll wearing a hat
No browser has a pinch event for a touchpad. What every major one does instead is send a `wheel` event with `ctrlKey` reported as true, because ctrl-plus-wheel was already the zoom gesture on a mouse. It is a convention nobody specified and everybody implements, and it is the only reason a web page can respond to a pinch at all.
Read it in Touchpad test →No accounts, and not out of laziness
Nothing is uploaded
Your QR text, your amounts and your passwords are processed on your machine. There is no server receiving them, so there is nothing to leak.
Works offline
Once the page has loaded, the tool keeps working even if the Wi-Fi drops.
One thing per page
Nobody needs a dashboard to generate a QR code. You come in, you sort it out, you close it.
No account, no limits
No sign-up, no watermark, no daily quota, no paid tier hiding behind it.
Missing a tool?
Tell us what you need. Every week we add the most requested ones, and they are free like the rest.
All tools
Each one does a single thing. We add new ones every week and none of them asks for an account.
Oven to air fryer
Tell it what the recipe says and it tells you what to set the basket to, with a printable chart that fits on one sheet.
Printer test page
Pick the blocks you actually need and download the sheet as a PDF, with real CMYK inks and a printed rule to prove nothing shrank on the way out.
Touchpad test
Measures what your touchpad actually sends the browser — rate, backtracks, momentum, pinch — and says plainly which parts no web page can see at all.
Bitrate calculator
Adds both tracks before it quotes a size, runs the sum backwards from a target, and measures a real file without uploading it anywhere.
Braille translator
Translates both ways in English or Spanish, contracts to grade 2, and lets you type the dots six keys at a time the way a Perkins does.
Reaction time test
Measures by sight, hearing or choice, reports the median instead of a mean one lapse ruins, and tells you how many milliseconds your kit adds.
Printable paper
Eight rulings at whatever spacing you ask for, as a PDF carrying real millimetres, with a printed line to prove your printer did not shrink it.
Spectrum analyzer
Live spectrum and spectrogram of any source, with the window function in your hands and the real resolution printed on screen.
Morse code translator
Translates both ways, sends it as tone, flash or vibration, and measures your own keying against the 1:3 the standard asks for.
Audio test
Five checks in order — left, right, stereo, microphone and latency — and a verdict that says what is broken, not just what you heard.
Online protractor
Upload a photo or measure straight on the screen: drag the arms and read the angle in degrees and radians.
Online ruler
Calibrate it once against a bank card and measure at true size, with the area and perimeter of any rectangle you draw.
Audio latency test
A click out of the speaker, recorded by the microphone. The gap is your real delay, Bluetooth included.
Fix my speaker
A sustained low tone moves the diaphragm far enough to push water out. Turn the volume all the way up and point the speaker at the floor.
Monitor calibration
Eight steps, each with its pattern, the exact state to reach, and which control to move in your monitor’s own menu.
Screen burn-in test
Flat full-screen fields at the grey levels where burn-in actually shows, plus a pixel refresher for temporary retention.
Screen test
Eleven full-screen patterns plus what your browser genuinely knows about the panel, with nothing to install.
Scroll test
Counts every notch in both directions and catches the backward jump that gives away a worn encoder.
Click speed test
Clicks per second across six durations, with the detail almost nobody shows: how steady your rhythm actually is.
Dead pixel test
Nine full-screen colours and an exerciser. Tells a dead pixel from a stuck one — different faults, different outcomes.
Decibel meter
Live level, average, peak and how long it is safe to stay. With an honest warning about accuracy.
Gamepad tester
Press every button, work the sticks, and measure drift at rest. Works with Xbox, PlayStation, Switch Pro and generic PC controllers.
Keyboard tester
Press every key and see which one does not answer. Includes a simultaneous-key test and a ghost repeat detector.
Microphone test
Watch the waveform and level as you speak, then record five seconds to hear yourself the way everyone else does.
Refresh rate test
Measures the Hz you are receiving right now, not the ones on the box. With a motion test and a full display readout.
Speaker test
Left, right, a 20 Hz to 20 kHz sweep and a polarity check. Every tone is generated in your browser.
Touchscreen test
Drag a finger over the whole screen and see which cells never light up. Includes draw mode, multi-touch and full screen.
Compound interest calculator
Project your savings with regular contributions and see how much of the result is interest rather than your own money.
Mouse tester
Check all five buttons, the wheel, and the phantom double click that gives away a worn micro-switch.
QR code generator
Links, text or Wi-Fi access. Download as PNG or SVG, with no watermark and no expiry.