Free online Developer tools
Format, validate, encode and generate data for your code.
12 tools
Base64 encoder and decoderConvert text or any file to Base64 and back. Supports the URL-safe variant, line breaks and data URI prefixes, and detects when decoded content is binary.Code to imageCreate attractive code screenshots for social media, slides, blogs or documentation. Paste your code, pick a language, theme and background, and download a crisp PNG or a scalable SVG.CSS minifier and beautifierShrink your stylesheets by removing comments, whitespace and empty rules, or do the opposite: turn minified CSS into readable, indented code. You will see the original size, the final size and the gzipped size.JavaScript minifier and beautifierCompress your JS by stripping comments and whitespace and shortening names, or format a minified script so it is readable. Powered by Terser, right in your browser.JSON formatter and validatorPaste your JSON to validate it, pretty-print it or minify it. If there is a syntax error, you will see exactly which line and column it is on.Mock data generatorCreate fictional datasets to test your app, fill a database or prepare a demo. Define the fields, the number of rows and the output format.Random number generatorPick a range and draw one or thousands of random numbers: integers or decimals, with or without repeats, sorted if you like. It uses the browser’s cryptographic generator and removes modulo bias so every number has exactly the same probability.Regex tester (regular expressions)Type a pattern and instantly see what matches in your text, with every capture group broken down. Switch to “Replace” mode to try substitutions with $1 or $<name>, and share your regex with a link.SQL formatterTurn a one-line SQL query into clear code with every clause in its place. Choose the dialect, indentation and keyword style. Everything in your browser.Unix timestamp converter (Epoch)Paste a timestamp or type a date in any format and instantly get every representation: Unix seconds and milliseconds, ISO 8601, RFC 2822, a readable date in your time zone and relative time.URL encoder and decoderTurn spaces, accents and symbols into their %XX form so a URL is valid, or get the original text back. Paste a full URL and we break it into parts so you can edit its query parameters.UUID generator (v4 and v7)Create cryptographically secure universally unique identifiers in bulk. Choose UUID v4 (fully random) or UUID v7 (time-ordered, ideal for database keys) and validate any UUID with the inspector.