ToolHandful
All tools
Your toolbox
30 tools
Time zone converterCompare times across cities and find overlapping work hours.Pomodoro timerA 25-minute focus timer with short and long breaks.White screenFill your screen with white or any solid color.Black screenA full-screen black display for checking light bleed.Dead pixel testFind and fix dead or stuck pixels with solid colors.FPS testMeasure your browser frame rate and refresh rate.Color blind testScreen your color vision with freshly drawn dot plates.Mic testCheck your microphone level, waveform and a recording.Camera testSee your webcam preview, real resolution and frame rate.Sound testCheck left and right speakers, stereo and frequency range.Headphone testCheck balance, bass, frequency range and polarity.CPS testMeasure your clicks per second from 1 to 100 seconds.Mouse testerTest every button, double click, scroll and polling rate.Keyboard testCheck every key, rollover and possible key chatter.Controller testerTest gamepad buttons, triggers and stick drift.Character counterCount characters, words and bytes against platform limits.Case converterSwitch text to upper, lower, title or sentence case.Morse codeTranslate text to Morse and back, with sound and light.Binary translatorTranslate UTF-8 text and convert whole numbers between bases.Fancy textTurn text into copy-and-paste Unicode styles.Spin the wheelPick a random name or option on a fair spinning wheel.Yes or no wheelSpin for Yes, No or Maybe, or play best of three.Big Five personality testReflect on five traits with 50 public-domain IPIP items.Attachment style quizReflect on closeness, reassurance and relationship patterns.Enneagram testFree nine-type personality test with wings, no email.QR code generatorMake QR codes for links, Wi-Fi and contacts. PNG or SVG, no sign-up.Random team generatorSplit a list of names into fair random teams.Barcode generatorMake Code 128, UPC, EAN and other barcodes. PNG or SVG.Base64 decode & encodeDecode or encode Base64 text and files, right in your browser.JSON formatterFormat, validate and minify JSON, with clear error messages.
Everything runs in your browser.Free tools. No sign-up.

About ToolHandful

ToolHandful is a small collection of free tools for checking the hardware you use every day: your microphone, your webcam and your screen. Every tool runs in your web browser, so there is nothing to download or install.

How the tools work

The tools use standard browser features. The mic and camera tests use your browser's media access, which only starts after you press Start and agree to the permission prompt. Audio and video are processed on your own device and are not sent to us.

The screen tools simply fill your display with color, and the FPS test counts the frames your browser draws.

Accuracy

The results show what your browser reports and measures. They are a practical check, not a laboratory measurement. Each tool page explains what its numbers mean and where a browser test has limits.

Contact

Found a bug or have an idea for a tool? Email contact@toolhandful.com.