Formatters, encoders, and generators for developers

The small tasks that interrupt actual work: making a minified blob readable, checking whether a pattern matches, encoding something for a URL, remembering what a cron expression means or what a 422 is. Each of these runs locally in your browser, which matters when the string you are pasting is a token or part of a customer record.

All 20 Developer Tools

Minify CSSCompress and minify CSS files.Minify JSCompress and minify JavaScript files.JSON FormatterFormat and beautify JSON data.Regex TesterTest regular expressions in real time.Base64 EncoderEncode text to Base64 format.Base64 DecoderDecode Base64 back to plain text.URL EncoderEncode special characters in URLs.URL DecoderDecode percent-encoded URLs.Lorem IpsumGenerate Lorem Ipsum placeholder text.HTTP Status CodesWhat every HTTP status code means, what causes it, and how to fix it.CSS Gradient GeneratorBuild a linear or radial CSS gradient visually and copy the CSS.Box Shadow GeneratorBuild a CSS box-shadow visually and copy the CSS.Cron Expression GeneratorBuild and understand cron expressions, with the next run times computed live.SQL FormatterFormat and beautify SQL queries for MySQL, PostgreSQL, SQL Server, and more.Chmod CalculatorCalculate the octal and symbolic chmod permission string.curl to Code ConverterConvert a curl command into Python, JavaScript, Go, PHP, and more.QR Code GeneratorGenerate QR codes for any link or text.Code BeautifierPretty-print HTML, CSS, or JavaScript code.XML FormatterPretty-print and validate XML data.HTML Entity EncoderEncode and decode HTML entities.

Which one do you need?

The tools above overlap in places. This is the quickest way to pick the right one.

An API response is an unreadable single line: JSON FormatterIndents it and reports exactly where the syntax breaks if it is invalid.
You are writing a pattern and want to see it match: Regex TesterLive matching against your own sample text beats deploying and hoping.
You need to embed binary data as text: Base64 EncoderAlso handy for reading the payload of a token by hand.
You need a schedule and cannot recall the field order: Cron Expression GeneratorBuilds the expression and explains in words what it will actually do.
You are setting Unix file permissions: Chmod CalculatorTranslates between 755 and the read/write/execute bits it stands for.
You hit a status code you do not recognise: HTTP Status CodesA reference page per code, with what actually causes it.
You have a curl command and need it in your language: curl to Code ConverterTurns a copied curl request into equivalent code.

Frequently asked questions

Is it safe to paste tokens or production data here?

These tools run in your browser — the JSON formatter, regex tester, encoders, decoders, minifiers, and hash generators never transmit what you paste. That said, treat any web page with real credentials cautiously as a habit, and prefer rotating a token you have pasted anywhere.

Does the JWT decoder verify the signature?

No. It decodes and displays the header and payload so you can inspect the claims. Verifying a signature requires the secret or public key, which is a server-side job and should never be done by pasting your key into a web page.

Does minifying change how my code behaves?

It should not. Minifiers strip whitespace, comments, and redundant syntax without altering logic. For production builds, use your bundler’s minifier so the output is part of a reproducible build — these pages are for one-off jobs and for inspecting what a minified file contains.

Why format SQL?

Generated and hand-edited SQL tends to arrive as one long line where the join conditions and nesting are impossible to follow. Formatting makes the structure visible, which is usually the fastest way to spot the mistake.