pocket notes — the tools edition
A pocketful of little tools, for the everyday.
Little tools that just work. Free to use, no sign-up, nothing to install. Each card has its own page — tap one and step inside.
don't know what to look for? try «base64» or «temperature».
Base64 encoder / decoder
Encodes text to base64 and back, with full UTF-8 so accents and emojis survive. Plus a URL-safe mode for tokens and URLs that hate the equals sign.
base64 is not encryption — it's a jacket, not a safe.
Binary & decimal converter
Two directions, one widget: binary to decimal and decimal to binary, with the powers of two shown. Ones and zeros, dressed up and sent home.
there are 10 kinds of people — those who get this joke, and those who don't.
Color converter
One colour, three languages. Pick it, drag it or type it — HEX, RGB and HSL all stay in sync, with a swatch that shows exactly what you're getting.
hue 0° and 360° are the same red — colour wheels are surprisingly round.
Data storage converter
One value, every size — bits, bytes, and decimal and binary kilo, mega, giga, tera, peta. A gigabyte means two things, depending on who's selling.
KB is 1,000 and KiB is 1,024 — the difference is why your 1 TB drive shows 931 GB.
Fraction & decimal converter
Two directions, one widget: fractions become decimals and decimals become fractions — including the stubborn repeating ones. Simplified, mixed and honest.
a fraction is just division being shy about it. we coax it out.
Hash generator
Turns any text into a fixed-length fingerprint with your choice of algorithm — MD5, SHA-1, SHA-256, SHA-384 or SHA-512. Same input, same output.
a hash is a one-way fingerprint — it's a blender, not a shredder that reverses.
Length converter
One value, every unit — millimetres, metres, miles and more at once. Because a mile means different things on land and at sea.
1 inch ≈ 2.5 cm is how doors and countries end up slightly wrong.
Lorem ipsum generator
Lorem ipsum with paragraphs, sentences or words, a classic-opening toggle, HTML tags for designers, and the complete original passage for purists.
generating gibberish is the one form of nonsense this site fully supports.
Password generator
Random passwords with your chosen length and character sets. With a strength meter that tells you if it'll survive a coworker with a birthday list.
longer beats clever. "correct horse battery staple" laughs at "Tr0ub4dor&3".
Percentage calculator
Four classic operations: a percentage of a number, one number as a percentage of another, percentage change, and add or subtract a percentage. All live.
percentages are opinions with decimals. we just make the decimals honest.
Power converter
One value, every power — milliwatts, watts, kilowatts, megawatts, gigawatts, horsepower and BTU/h. From the bulb to the power plant, at once.
1 hp ≈ 1.014 PS — the European horse is slightly stronger.
ROI calculator
Cost in, final value out, and the percentage that decides whether you brag or quietly delete the spreadsheet. With the annualized return for the patient.
negative ROI is not failure — it's a discounted lesson.
Salary & hourly converter
Two directions, one widget: hourly rate to salary, or salary back to the hourly rate it's worth. With your hours per week and weeks per year.
comparing jobs by annual salary is how people end up working two jobs.
Meta description length checker
Measures your meta description against the ~160 characters Google shows, with a live snippet preview, a gauge, and a verdict on how it feels.
the first 60 characters do the heavy lifting — put the answer there.
Shoe size converter
One size, every system — cm, EU, UK and US men's and women's, plus kids sizes. Because a size 5 means different things to toddlers and adults.
shoe sizes are approximate and brands differ — a guide, not a blood oath.
Speed converter
One value, every speed — metres per second, km/h, mph, feet per second and knots. The three languages of "please don't speed".
100 km/h ≈ 62 mph ≈ 28 m/s. pick your favourite denial.
Temperature converter
One value, every scale. Type a number, pick its unit, and it becomes Celsius, Fahrenheit and Kelvin at once — with an honest opinion on how it feels.
−40 is where Celsius and Fahrenheit finally agree — and where you regret everything.
Time converter
One value, every time — seconds, minutes, hours, days, weeks, months and years. Because a year means different things to calendars and courtrooms.
a day is 86,400 seconds — the number your alarm clock mocks you with every morning.
Tip calculator
Bill, tip percentage and how many friends to blame. Get the tip, the total and per person — live, with an optional round up for the server.
tipping is social math. we do the arithmetic, you do the small talk.
Typing speed test
Type the phrase as fast as you can while the letters above blush in ink or bleed in red. WPM, accuracy and a verdict you didn't ask for.
your first result is your warm-up. do not panic, do not blame the keyboard.
UUID generator
Random UUIDs in batches, with version, count and formatting at your command. v4 for the standard, v1 for the timestamped, uppercase or compact.
UUIDs are unique-ish, not unique-guaranteed — but the odds are so small your browser crashes first.
Volume converter
One value, every volume — millilitres, litres, cups, pints, gallons and more at once. Because a cup means different things to bakers and plumbers.
4 cups ≈ 1 litre — good enough for soup, risky for science.
Weight converter
One value, every weight — grams, kilos, tonnes, ounces, pounds, stones and tons. Because a stone is a measurement, not an emotion.
1 kg ≈ 2.2 lb is how luggage and dumbbells make sense at once.
Word counter
Counts words, characters, sentences and reading time as you type. Perfect for essays, tweets and SEO descriptions.
counting is free. like this widget, and like good advice.
nothing here.
not even a button to complain about it.