To convert Base64 to an image, you decode the text back into the picture it was made from. Base64 is a way of writing binary data, like a photo or an icon, as plain text so it can travel inside HTML, CSS, JSON, or an email. That text looks like a long random string, but … Read more
To convert text to Morse code, each letter is replaced by its own pattern of dots and dashes. The word SOS becomes … — …, three short signals, three long, three short. Morse code was built in the 1830s to send messages over a telegraph wire using nothing but short and long pulses, and it … Read more
Converting ASCII to hex means taking each character of text and writing its number code in hexadecimal. The letter A has the ASCII code 65, which is 41 in hex, so the text A becomes 41. The same idea lets you convert ASCII to binary, decimal, octal, Unicode, and more, because every character is really … Read more
To convert binary to decimal, you add up the place values wherever the binary number has a 1. Binary 1101 has a 1 in the eight, four, and one positions, so it is 8 plus 4 plus 1, which is 13. The same binary string can also be written as hexadecimal or octal, and each … Read more
To convert binary to text, you turn each group of eight bits back into the character it stands for. Computers store every letter and symbol as a number, and that number is held in binary, so a string like 01001000 01101001 is really just the word Hi written the way a machine keeps it. This … Read more
Free online converters do one job well: they take data in one format and hand it back in another. Convert a binary string into readable text, a BMP photo into a PNG, a Base64 blob into an image, a column of JSON into a CSV row. Each is a small, exact task that is slow … Read more
Color tools turn a vague idea about color into exact, usable values. A designer can say a button should be a calm green, but a browser needs a precise code, a layout needs colors that read clearly for every visitor, and an image may already hold the perfect palette waiting to be pulled out. This … Read more
JSON and CSV tools solve the same underlying problem: data that needs to be checked, converted, or reshaped before it will work. JSON and CSV are the two formats most data travels in, one built for structure and nesting, the other for plain tables, and both break in small, frustrating ways. A single missing comma … Read more
Date and time tools handle a kind of arithmetic that looks simple and is quietly full of traps. Months have different lengths, some years carry an extra day, clocks run on two competing formats, and the world is divided into time zones that do not line up neatly. A single overlooked rule can throw a … Read more
BMI, short for body mass index, is a single number worked out from a person’s height and weight. It is one of the most widely used figures in health screening, and also one of the most widely misunderstood. The primary sources on what the figure can and cannot say are the CDC’s BMI overview and … Read more
Free online calculators handle the kind of arithmetic that is slow, error-prone, or simply tedious to do by hand. Finding every prime factor of a large number, working out the 40th Fibonacci number, or checking a body mass index takes seconds with the right tool and several careful minutes without one. This guide is a … Read more
Base64 encoding is the reason you can paste an image straight into a CSS file, send a photo as an email attachment, or store a whole file inside a single line of JSON. It takes raw binary data and rewrites it using only plain text characters that survive being sent anywhere. This guide explains Base64 … Read more
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