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Free tools that run in your browser

Small, fast, single purpose utilities. Everything runs in your browser — no accounts, no uploads, no waiting.

Encoding

Base64Encode and decode Base64, UTF-8 safe. URL EncodePercent-encode or decode URLs and query values. URL ParserBreak a URL into its parts, query and all. HTML EntitiesEscape or unescape HTML special characters. JWT DecoderRead a token's header and claims. No verification.

Reference

ASCII TableEvery code 0 to 255, with the HTML entity and what it is called. HTTP StatusEvery HTTP status code, what it means, and where it is defined. MIME TypesEvery media type, its file extensions, and where it is defined.

Text & data

Text DiffCompare two pieces of text, line by line. JSONValidate and re-indent JSON, with precise errors. ReverseReverse text by characters, words or lines. SpeechRead text aloud with the voices this device has. Regex TesterTest a regular expression in JavaScript, PHP, Go, Rust, sed or grep, explained and drawn. Word CountWords, characters, lines, and how long it takes to read. URL SlugTurn a title into a clean URL slug. Case ConvertercamelCase, snake_case, kebab-case and friends.

Generators

PasswordCryptographically random passwords, generated locally. Wifi QRA QR code guests can scan to join your wifi. UUIDTime-ordered v7 or random v4 UUIDs, as many as you need. HashMD5, CRC32, SHA-1, SHA-2 and SHA-3 digests. RandomRandom whole numbers from a range you choose.

Time

UTC ClockThe time now, in UTC and in this browser's zone. World Time ZonesLine up the hours in up to 15 time zones. TimerCount down to zero, with a sound at the end. StopwatchTime something, with laps and splits. Epoch ConverterUnix timestamps to dates and back. CronRead a cron schedule in plain English, or build one, and see when it runs next.

Numbers

PercentilePercentiles and summary stats for a set of numbers. CalculatorEvaluate expressions, one per line, with variables. Number BaseConvert between binary, octal, decimal and hex. SpreadsheetA quick sheet with formulas, kept in its own link.

Money

Compound InterestSavings growth with deposits, taxes, fees and inflation. Retirement SavingsHow long savings cover spending once the paychecks stop.

Color

Color PickerPick a color, or paste one, and get every format.