Free developer utilities. They run in your browser, so what you type never leaves your device.
Format, validate and minify JSON right in your browser.
Test JavaScript regular expressions and see every match highlighted.
Decode JSON Web Tokens and check when they expire.
Beautify SQL queries for MySQL, PostgreSQL, SQL Server and more.
Compare two texts and see what was added and removed.
Write Markdown and see the result live, then copy the HTML.
Translate cron schedules into plain language.
Break a URL into protocol, host, path and query parameters.
Convert Unix timestamps to dates and dates to timestamps.
Convert JSON arrays to CSV spreadsheets and back.
Convert between JSON and YAML in both directions.
Convert numbers between binary, octal, decimal and hexadecimal.
Convert colors between HEX, RGB and HSL with a live preview.
Convert text to binary, hexadecimal, octal or decimal bytes and back.
Turn an image into a Base64 data URI for HTML or CSS.
Encode text to Base64 or decode it back, with full UTF-8 support.
Percent-encode text for URLs or decode it back.
Escape special characters as HTML entities or decode them.
Get the SHA-1, SHA-256, SHA-384 and SHA-512 hash of any text.
Sign a message with a secret key using HMAC-SHA.
Create strong random passwords with the options you need.
Generate random version 4 UUIDs, one or many at a time.
Turn links and text into QR codes you can download.
Generate placeholder text by paragraphs, sentences or words.
Pick random numbers in a range, with or without repeats.
Turn titles into clean, URL-friendly slugs.
Count words, characters, sentences and reading time.
Convert text to UPPERCASE, camelCase, snake_case, kebab-case and more.
Sort lines, remove duplicates and empty lines, shuffle and more.
Work out percentages, proportions and percentage changes.
Find the time between two dates, your age, or add days to a date.
Build Unix file permissions in numeric and symbolic form.