A hub of tiny useful apps
Each tool solves one small problem. No accounts. Data stays in your browser.
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View all appsStaySplit
Split lodging costs fairly when people stay different nights (optional fixed fee).
Business-day calculator
Convert “N business days” into a real date. Add holidays. Clear rules.
Guitar Practice
Metronome, practice timer, chord cheatsheet, and simple local practice log.
Timestamp converter
Convert Unix timestamps ↔ datetime. Supports seconds/milliseconds and UTC/local display.
Epoch converter
Convert Unix epoch ↔ datetime with auto-detect (seconds/milliseconds). Shows UTC/local and a relative “from now” hint.
JSON prettifier
Prettify or minify JSON locally. Shows parse errors with line/column hints. Copy output or share a link. Browser-only MVP.
JSON prettify
Prettify or minify JSON locally. Optional key sorting. Copy output or share a link. Browser-only MVP.
CSV to JSON converter
Convert CSV to JSON locally (header option, delimiter, quoting). Copy JSON or share a link. Browser-only MVP.
New
View all appsRemove empty lines
Remove empty lines from text. Optionally trim first and keep a single blank line between paragraphs. Copy output or share a link. Browser-only MVP.
JSON Lines (JSONL) viewer
Validate and view JSONL/NDJSON line by line. Shows error line numbers. Copy output or share a link. Browser-only MVP.
Text line reverser
Reverse line order (like tac) and/or reverse characters per line. Copy output or share a link. Browser-only MVP.
Text wrap
Wrap text to a fixed line width locally. Keep words or hard-break. Copy output or share a link. Browser-only MVP.
Text find & replace
Find and replace text locally (plain text or regex). Show match count, copy output, or share a link. Browser-only MVP.
Text join
Join multiple lines into a single line. Choose a delimiter (space/comma/tab/custom), trim each line, and ignore empty lines. Copy output or share a link. Browser-only MVP.
Text word counter
Count words, characters, lines, and paragraphs in text. Options: ignore empty lines; rough mode for CJK. Copy the result or share a link. Browser-only MVP.
Text table formatter
Format a plain text table by aligning columns into a fixed-width layout (spaces). Supports auto delimiter detection (tab / 2+ spaces), optional cell trim, right-align numeric columns, configurable column gap, plus copy output and share link. Browser-only MVP.
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