All tools
developer
Cron Expression Explainer
Paste any cron expression and get a plain-English explanation instantly. Supports ranges, steps, lists and @daily/@hourly aliases.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back. Handles seconds and milliseconds automatically, shows ISO 8601, UTC and relative time.
JWT Decoder
Decode a JWT header and payload online. See algorithm, issued and expiry times and whether it has expired. Runs in your browser; nothing is uploaded.
Base64 Encode & Decode
Encode text to Base64 or decode Base64 back to text online. Handles UTF-8, emoji and accents, supports URL-safe Base64 and runs entirely in your browser.
URL Encoder & Decoder
Encode or decode URLs and query strings online. Percent-encode special characters, UTF-8 and emoji, or decode %20 sequences back to readable text.
JSON Formatter & Validator
Format, beautify, minify and validate JSON online. Pretty-print with custom indentation, sort keys, and get the exact line and column of syntax errors.
HEX to RGB Color Converter
Free online color converter: turn HEX into RGB and HSL, or RGB and HSL back into HEX. Paste any CSS color and copy the format you need.
Binary, Decimal & Hex Converter
Free online number base converter. Turn binary into decimal, decimal into hex or octal, or any base from 2 to 36. Handles huge numbers and 0x/0b prefixes.
text
Readability Checker
Free readability score calculator: Flesch Reading Ease, Flesch-Kincaid grade, Gunning Fog and ARI, plus word count and reading time.
Text Case Converter
Convert text case online: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE.
Word Counter
Free online word counter: count words, characters, sentences and paragraphs, see the most used words and estimate reading and speaking time.
Remove Duplicate Lines
Free online tool to remove duplicate lines from a list. Keep the first occurrence, ignore case or spaces, drop empty lines, optionally sort A–Z.
Lorem Ipsum Generator
Free lorem ipsum generator. Create placeholder text by paragraphs, sentences or words, with or without the classic "Lorem ipsum dolor sit amet" opening.