Tools that solve one problem — fast
No sign-up, nothing to install. All processing happens in your browser: your data never leaves your device.
74tools
100%client-side
EN / RU / ESinterface languages
Text tools
Character CounterCount characters, words and sentences in real timeCyrillic to Latin ConverterTransliterate Cyrillic text to Latin lettersCase ConverterUPPERCASE, lowercase, Title Case, camelCase and moreText Diff CheckerCompare two texts line by line and see what changedMorse Code TranslatorText to Morse code and back, with audio playbackRoman Numeral ConverterNumbers to Roman numerals and back, 1 to 3999Sort & Deduplicate LinesSort a list alphabetically, remove duplicates and blank linesKeyword Density CheckerTop single words and phrases in your text, with frequencyText to SpeechRead any text aloud in your browser, with voice and speed controlDate to Roman NumeralsConvert a date to Roman numerals — for tattoos and weddingsUpside Down TextFlip text upside down, reverse or mirror it — copy in one tapText CleanerRemove line breaks, extra spaces and empty lines in one click
Finance
Number to WordsConvert numbers and amounts into wordsVAT CalculatorAdd or extract VAT at any ratePercentage CalculatorX% of Y, what percent one number is of another, and % changeIBAN ValidatorCheck an IBAN's structure and checksum for 70+ countriesLoan CalculatorMonthly payment, total interest and total cost of a loanTip CalculatorTip amount, total and per-person split for a billCompound Interest CalculatorGrow savings with interest and monthly contributions over timeDiscount CalculatorSale price and savings from a percent off — or find the % off
Dates & time
Days Between DatesDays, weeks and workdays between two datesUnix Timestamp ConverterConvert Unix time to a date and back, with live clockAge CalculatorExact age in years, months and days from a birth dateTime Zone ConverterConvert a time between any two time zones, with DSTHours CalculatorAdd up work hours between start and end times, minus breaksAge Difference CalculatorExact age gap between two birth dates
Developer tools
JSON FormatterFormat, validate and minify JSON onlineUUID GeneratorGenerate random UUID v4 identifiers in bulkBase64 Encode/DecodeEncode text to Base64 or decode it back, liveJWT DecoderDecode a JWT header and payload instantlyHash GeneratorMD5, SHA-1, SHA-256, SHA-512 for text and filesRegex TesterTest regular expressions live, with highlighted matchesFile to Base64 ConverterConvert an image or file to a Base64 data URICron Expression GeneratorBuild a cron schedule or decode one into plain EnglishBinary / Decimal / Hex ConverterConvert numbers between binary, octal, decimal and hexURL Encoder / DecoderPercent-encode or decode a URL or query stringCredit Card Number ValidatorCheck a card number's Luhn checksum and detect its brandHTML Entity Encoder / DecoderEscape or unescape HTML special charactersPX to REM ConverterConvert between px and rem for CSS, with a custom root sizeResistor Color Code CalculatorResistance and tolerance from 4 or 5 color bandsChmod CalculatorConvert Linux file permissions between 755 and rwxr-xr-xPPI / DPI CalculatorPixel density (PPI) from resolution and screen size
Security
Generators
QR Code GeneratorFree QR codes, no scan limits, no hidden subscriptionBarcode GeneratorCODE128, EAN-13, UPC and CODE39 barcodes as SVGFavicon GeneratorTurn any image into a full favicon set for your siteLorem Ipsum GeneratorPlaceholder text by paragraphs, sentences or wordsCSS Gradient GeneratorBuild linear and radial CSS gradients and copy the codeCSS Box Shadow GeneratorDesign a CSS box-shadow visually and copy the code
Images
Converters
Unit ConverterLength, weight, temperature, area, volume, speed and dataColor ConverterConvert a color between HEX, RGB and HSLCSV to JSON ConverterTurn CSV (with headers) into an array of JSON objectsText to Binary ConverterConvert text to binary and binary back to textJSON to CSVTurn a JSON array of objects into a CSV tableAspect Ratio CalculatorFind the aspect ratio and resize keeping proportionsCooking Measurement ConverterCups, tablespoons, grams and ml — by ingredientShoe Size ConverterUS, UK, EU and cm shoe sizes for men and womenRing Size ConverterUS, UK, EU ring sizes and diameter in mm
Health
BMI CalculatorBody mass index from weight and height, with categoryCalorie Calculator (TDEE)Daily calories (TDEE & BMR) to maintain, lose or gain weightSleep CalculatorThe best times to go to bed or wake up, by 90-minute cyclesIdeal Weight CalculatorIdeal weight by height and sex, with a healthy BMI rangeRunning Pace CalculatorPace, time or distance — enter any two, get the third