Everything you need,
all in the browser.
17+ browser-based utilities — JSON formatter, Unix timestamp converter, Base64, Diff checker, QR generator, unit converter, password generator, age & D-day calculators, loan & BMI calculators, and more — all client-side, no sign-up required.
Popular Tools
View All →JSON Formatter
Format, validate, and inspect JSON payloads directly in the browser without sending data to a server.
XML Formatter
Format, validate, and minify XML documents directly in the browser without uploading data to a server.
Unix Timestamp
Convert epoch timestamps to readable dates and turn human-readable dates back into Unix seconds or milliseconds.
Base64
Quickly encode text to Base64 or decode Base64 strings back into readable content in the browser.
JWT Decoder
Decode JWT header and payload segments in the browser so you can inspect claims without sending tokens to a server.
Diff Checker
Compare two text blocks with line-level and word-level highlighting to review edits, prompts, docs, or config changes.
Multiline to Oneline
Flatten multiline CLI snippets, shell continuations, and markdown-fenced command blocks into a single copy-ready line in the browser.
QR Code
Generate QR codes from URLs or plain text instantly so you can share links, test flows, or hand off data between devices.
Age Calculator
Calculate exact age from a birth date on today or any custom reference date, including years, months, days, total days lived, and time until the next birthday.
D-Day Calculator
Calculate D-day countdowns or elapsed days between a target date and a reference date, including D-10, D-Day, and D+3 style results.
Unit Converter
Convert temperature, length, and weight units such as Celsius to Fahrenheit, meters to feet, and kilograms to pounds in one browser-based tool.
Loan Calculator
Estimate monthly payments for mortgages, car loans, amortizing loans, and interest-only loans with total repayment and total interest figures.
Update Note
View StatusDiff checker column copy selection fixed
Reordered the diff checker comparison markup so selecting one side of the diff no longer pulls text from the opposite column.
Decimal / binary / hex converter added
Added a number-base converter tool for exact integer conversion between decimal, binary, and hexadecimal formats.
Five new text tools added
Added snake_case ↔ camelCase, text-to-slug, lowercase/uppercase, remove-duplicate-lines, and sort-lines tools.
Explore
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