Simple tools that solve one problem well. No strings attached.
Character codes.
Scale dimensions proportionally.
Export & restore all app data.
Make EAN, UPC & Code 128 codes.
EAN, UPC, Code 128 & more.
Binary, hex, octal, decimal.
Encode & decode base64.
Parimutuel pool betting.
Huge message across the room.
Split bills by who ordered what.
Box breathing to calm down.
Decode capacitor color bands.
camelCase, snake_case & more.
Copy em dashes, arrows & more.
Two-player game timer.
Unix permissions decoder.
Shift a chord sheet to a new key.
Generate random colors.
See images as colorblind users do.
Device magnetometer.
Share contact details as a QR.
WCAG color contrast ratios.
Count down to zero.
Decode cron expressions.
Convert both directions.
Days between dates, ages.
Days since & until saved dates.
Fullscreen display check.
Battery, network, hardware.
Roll D&D dice with history.
Sum up hours and minutes.
What a device costs to run.
AES encryption with password.
Measure password strength.
Remove photo metadata & GPS.
Pick colors from your screen.
All favicon sizes from one image.
Camera flash or bright screen.
Test controller buttons & sticks.
Speed from GPS.
Compress & decompress files.
SHA hashes as you type.
Encode & decode & friends.
Check account numbers offline.
Shrink images, all on-device.
Data URIs from any image.
Mic pitch detection.
Work/rest rounds with beeps.
Project investment growth.
Format and validate JSON.
Decode JWT tokens.
Stop screen from sleeping.
See JS key event values.
Essential knot reference.
Calculate LED resistor value.
Ambient light sensor.
Sort, dedupe & shuffle lines.
Calculate loan payments.
Placeholder text on demand.
Mindfulness timer.
Web Audio rhythm keeper.
Front camera as a mirror.
Today's moon and what's next.
Encode/decode morse.
Read & write NFC tags.
White, brown, pink noise.
Markdown notes with live preview, saved locally.
1234 in plain English.
Temporary group chat & file sharing.
Send files device to device, no server.
Distance, time & running pace.
Calculate parking costs.
Stateless password generation.
Combine PDFs, fully offline.
Step counter.
The three % questions.
Element lookup & info.
NATO phonetic codes.
Key physics values.
Solar system reference.
25 min work + 5 min break.
Generate QR codes instantly.
Scan QR codes with camera.
Pick a name from a list.
Test your reflexes.
Scale ingredients by servings.
Test regex patterns live.
Decode resistor color bands.
MCMXC ⇄ 1990.
Keep score on game night.
Screencasts: screen, voice & webcam.
Vibration trace from sensors.
Track what you need to buy.
Units & prefixes.
Emergency signaling.
EU, US & UK clothing sizes.
Draw & sign, save as PNG.
Bedtimes by sleep cycles.
Live mic level in dB.
Left, right & sweep.
Browser announces time.
Browser transcribes your voice.
Flash words at your reading pace.
Check if surface is level.
Simple timer that counts up.
CIDR to ranges & masks.
Sun times and golden hour.
Count anything, one tap at a time.
Tap along to find the tempo.
Auto-scrolling script reader.
Compare two texts line by line.
Browser speaks your text.
Convert times across timezones.
Pure tones, any frequency.
2FA codes from a secret, offline.
Multi-touch visualizer.
Measure your typing speed.
Reveal hidden characters in text.
Convert units instantly.
Which package is the better deal?
Timestamp ↔️ date converter.
Break URLs into parts.
Generate unique IDs.
Record audio, download it.
Calculate output voltage.
Your GPS coordinates.
Share your Wi-Fi as a QR code.
Words, chars, reading time.
See time across timezones.
Convert either way, instantly.