Developer Utilities
Tools for everyday development tasks: test a regex against real text, work out the right chmod mode for a file, or open a SQLite database and query it right in the browser.
SQLite Database Viewer
View and query SQLite databases directly in your browser with a visual query builder and SQL editor.
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Word Counter
Count words, characters, sentences and paragraphs as you type, with reading time, speaking time and keyword density. Handles accents, emoji and non-Latin scripts.
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Character Counter
Count characters with and without spaces, letters, digits, lines and UTF-8 bytes, with limit bars for X, SMS, meta descriptions, Instagram and LinkedIn.
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Diff Checker
Compare two texts or code files and see added, removed and changed lines highlighted side by side or inline, down to the character. Private and in-browser.
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Regex Tester
Test JavaScript regular expressions with live match highlighting, g/i/m/s/u/y flags, a capture-group breakdown for every match, and a replace preview. Runs off the main thread, so a runaway pattern can't freeze the tab.
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Chmod Calculator
Work out Unix file permissions: tick read/write/execute for owner, group and others, or type an octal mode like 755 or a string like rwxr-xr-x. Get the chmod command in numeric and symbolic form, including setuid, setgid and sticky bits.
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