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Developer tools

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. ASCII TableEvery code 0 to 255, with the HTML entity and what it is called. HTML EntitiesEscape or unescape HTML special characters. JWT DecoderRead a token's header and claims. No verification.

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.

Numbers

RandomRandom whole numbers from a range you choose. PercentilePercentiles and summary stats for a set of numbers. CalculatorEvaluate expressions, one per line, with variables. UTC ClockThe time now, in UTC and in this browser's zone. TimerCount down to zero, with a sound at the end. StopwatchTime something, with laps and splits. Epoch ConverterUnix timestamps to dates and back. Number BaseConvert between binary, octal, decimal and hex.

Color

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

Text & data

JSONValidate and re-indent JSON, with precise errors. ReverseReverse text by characters, words or lines. SpeechRead text aloud with the voices this device has. URL SlugTurn a title into a clean URL slug. Case ConvertercamelCase, snake_case, kebab-case and friends.