Tech, Text and Color Tools
Free tech tools for binary and text encoding, case conversion, word frequency, aspect ratio, screen PPI and color codes. Everything runs in your browser.
Encoding & Web
- Text to Binary ConverterTurn text into binary, hexadecimal or decimal bytes using UTF-8, or decode bytes back into text, and see the code of every character in a table.
- Binary and Hex CalculatorConvert signed integers exactly between bases 2–36, including binary, octal, decimal and hexadecimal without floating-point precision loss.
- Binary CalculatorDo exact integer arithmetic and bitwise logic in binary, octal, decimal, hex or any base up to 36, and see every result in all four bases with its bit pattern.
- Base64 Encoder & DecoderConvert text to Base64 or back to UTF-8 with standard and URL-safe alphabets, or convert an image file to a data URI and Base64 back to a downloadable image.
- URL Encoder & DecoderChoose whether you are encoding one URL value, a complete URI or a form value, then convert text with the appropriate separator and space rules.
Text Tools
- Case ConverterPaste text once and see it in every common letter case, from Title Case and Sentence case to camelCase, snake_case and kebab-case for code.
- Word Frequency CounterPaste text to rank its words by how often they occur, with each word's count and share of the total, plus total and unique word counts.
- Online NotepadWrite plain-text notes with live word and character counts, then download them as a .txt file. Saving in this browser is optional and off by default; notes are never uploaded.
- Character CounterPaste text to count visible characters, words, whitespace-free characters and bytes. Choose how your custom limit is measured, including emoji-aware character counts.
Screens & Images
- Aspect Ratio CalculatorReduce a width and height to their simplest ratio, see its decimal form and common name, or resize an image or video while keeping the same proportions.
- PPI CalculatorFind the pixel density of a monitor, laptop or phone from its resolution and diagonal size, plus dot pitch, physical width and height, and megapixels.
- Screen ResolutionYour screen resolution, device pixel ratio, browser viewport and window size, read by your own browser and updated live as you resize, zoom or rotate.
- Pixel RulerMeasure on your screen in pixels, centimeters or inches. Pixel readings are exact; for true physical centimeters and inches, calibrate against a bank card or your display's PPI.
Color
- Color ConverterEnter a color as HEX, RGB, HSL, HSV or CMYK and get every other format, its WCAG relative luminance, and its contrast ratio against white and black.
- Color PickerChoose a color with the picker, sliders or the color wheel and copy its HEX, RGB and HSL codes. Build matching color schemes or blend colors with the RGB mixer.
Network & Security
- Password GeneratorGenerate strong random passwords in your browser using the Web Crypto API. Nothing is transmitted or stored — see the entropy and estimated crack time for each result.
- IP Subnet CalculatorCalculate an IPv4 network, masks, address range and usable hosts, or an IPv6 prefix’s network, first and last address, address count and prefix list.
- Bandwidth CalculatorEstimate transfer time, work backward from a deadline, convert data units or compare website traffic and billing-period usage with an average connection speed.